Answer:
a. The purple allele is lethal in the homozygous state
Explanation:
You cross a purple parrot with a true breeding (homozygous) white parrot and you get 1/2 purple parrots and 1/2 white parrots. This result can only happen if the purple parrot is heterozygous and the white parrot is homozygous recessive (if any of the parents had been homozygous dominant, 100% of the offspring would have had the dominant phenotype).
Then: Pp (purple) X pp (white) ---> 1/2 Pp, 1/2 pp
When you cross two purple parrots you get 1/3 white parrots and 2/3 purple parrots. The 2:1 phenotypic ratio is typical of a lethal allele in the homozygous state.
In a cross of two purple parrots: Pp
X Pp, one would expect the genotypic ratios 1 PP : 2 Pp : 1pp and the phenotypic ratios 3 Purple : 1 white.
But the PP genotype is lethal, so those individuals die and the only purple parrots we see are the heterozygous ones.
Final answer:
The best explanation for the observed 2:1 ratio of purple to white parrots when two purple parrots are crossed is that the white allele is lethal in the homozygous state, causing the absence of white homozygous offspring.
Explanation:
The crossing of the rare purple plumed parrot with a true breeding white parrot yielding 50% white and 50% purple parrots indicates that purple is a dominant trait while white is recessive. This is further supported by the second cross between two purple parrots yielding 1/3 white and 2/3 purple parrots, which suggests that white allele is lethal in the homozygous state. When heterozygous parents with the lethal allele are crossed, we would expect a 2:1 ratio of purple to white parrots because the white homozygous (recessive lethal) parrots do not survive.
What term is used to describe all the alleles at every locus for all individuals within a population?
Answer: GENE POOL is used to describe all the alleles at every locus for all individuals within a population.
Explanation: The gene pool consists of the sum total of all the genes in a particular population. It includes all the genetic information encoded in these genes.
The Hardy-Weinberg law provides equation to relate genotype frequencies and allele frequencies in a randomly mating population;
p² + 2pq + q² = 1 for two alleles such as A and a, where p and q are probabilities of allele frequencies. That is,
p = homozygous dominant
pq = heterozygous
q = homozygous recessive
The gene pool is commonly used during population studies. Therefore, population genetics is the branch of genetics that describes inheritance on the population level in mathematical terms.
If you were setting up an experiment to disprove spontaneous generation in a liquid medium, which of the following would be essential to the experiment?A) supplying the liquid with nutrientsB) starting with a liquid that contains microorganismsC) adding antibiotics to the liquidD) using a sterile liquid and eliminating exposure to microorganismsE) adding carbon dioxide to the liquid
Answer:
D) using a sterile liquid and eliminating exposure to microorganisms
Explanation:
The theory of spontaneous generation states that living species could generate from a nonliving matter and that such activities is often seen in life. Take for example, it was hypothesized that specific forms like fleas may have generated from nonliving matter like dust, or that maggots generated from dead and nonliving flesh.
Francesco Redi disproved the
Theory of spontaneous generation for large organisms by proving that maggots must have generated from meat mainly when flies happen to lay eggs in the meat.
From the Francesco Redi experiment, we can infer that using a sterile liquid and eliminating exposure to microorganisms will surely disprove spontaneous generation in a liquid medium.
Calculate the sample standard deviation and sample variance for the following frequency distribution of heart rates for a sample of American adults. If necessary, round to one more decimal place than the largest number of decimal places given in the data.
Answer:
Let's complete the question using these data
Heart Rates in Beats per Minute
Class Frequency
61-66 2
67-72 11
73-78 11
79-84 3
85-90 8
Sample variance = 56.6924
Sample std dev = 7.5
Explanation:
First, let's find the average
The average
(2 x 63.5 + 11 x 69.5 + 11 x 75.5 + 3 x 81.5 + 8 x 87.5)
___________________________
(2+11+11+3+8)
2666.5
= _______
35
= 76.18571
variance = 1927.54/34
= 56.6923529
Sample variance = 56.6924
std dev = sqrt( variance)
= sqrt(56.6924)
= 7.529
Sample std dev = 7.5
To calculate the sample standard deviation and sample variance, find the mean of the data, calculate the squared deviations from the mean multiplied by their respective frequencies, sum up the squared deviations, divide by the sum of the frequencies minus one to get the sample variance, and take the square root of the sample variance to obtain the sample standard deviation.
Explanation:To calculate the sample standard deviation and sample variance for the given frequency distribution, we need to first calculate the mean of the data. Then, we will calculate the deviations of each observation from the mean, square those deviations, and multiply them by their respective frequencies. Next, we sum up the squared deviations and divide it by the sum of the frequencies minus one to calculate the sample variance. Finally, we take the square root of the sample variance to obtain the sample standard deviation.
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________ are particularly polarizable. ________ are particularly polarizable. Small polar molecules Large nonpolar molecules Large polar molecules Small nonpolar molecules Large molecules, regardless of their polarity,
Answer:
____Large molecules, regardless of their polarity____ are particularly polarizable.
Explanation:
All the large molecules are called polar molecules because they have many bonds including ionic bond, Van der Waals forces or hydrogen bond and flexibility in conformation. This property also increase the boiling point of large molecules.
Dispersion forces, also known as London dispersion forces or Van der Waals forces, are the primary intermolecular forces between all molecules. Larger molecules, regardless of their polarity, are particularly polarizable and have stronger dispersion forces. Small nonpolar molecules have weaker dispersion forces.
Explanation:Dispersion forces are the primary intermolecular forces between all molecules, including polar and nonpolar molecules. These forces are also known as London dispersion forces or Van der Waals forces. Larger molecules, regardless of their polarity, are particularly polarizable and have stronger dispersion forces. Small nonpolar molecules, on the other hand, have weaker dispersion forces.
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For Type A individuals, exposure to stress is especially likely to inhibit organs such as the ________ from removing cholesterol and fat from the blood.
Answer:
For Type A individuals, exposure to stress is especially likely to inhibit organs such as the _liver_ from removing cholesterol and fat from the blood.
The study of psychoneuroimmunology suggests that when a stressful situation is encountered, several biological reactions occur, including all of the following EXCEPT:a) hormone secretion. b) rise in heart rate and blood pressure. c) increased respiration and sweating. d) lightheadedness or unconscious episodes.
Answer: d) lightheadedness or unconscious episodes.
Explanation:
There are several ways the body responds to stress but one method used by psychologists to measure this response is Hans Selye's general adaptation syndrome. This occurs in 3 stages:
1. The alarm reaction. This occurs when the stressor is first presented resulting in the RELEASE OF HORMONES from the adrenal gland into the blood stream. The hormone in turn cause sympathetic nervous system activation and increase energy levels, INCREASE RESPIRATION, increase muscle tension, reduce sensitivity to pain, slow down the digestive system, and cause a RISE IN BLOOD PRESSURE.
2. The stage of resistance- this occurs till the stress is removed.
3. The stage of exhaustion
Answer: Option D ( lightheadness and unconscious episodes)
Explanation: When stressful situation is encountered by the body, the body system initiates some biological reactions which are symptomatic (being felt). The symptoms include:
1. Hormonal secretion: the body secrets counter-regulatory hormones (e.g epinephrine) to regulate the stress.
2. Increased heart beat and blood pressure due to constriction of vessels by stress.
3. Increased biochemical activities which will requires more intake of oxygen to breakdown glucose to produce energy (ATP) and heat is lost through sweat.
As a result of stress, the anterior pituitary releases ________, which stimulates release of hormones from the adrenal cortex that retain sodium and water, increase blood sugar, and begin breaking down fats.
A) thyroidstimulatinghormone
B) growthhormone
C) ACTH
D) ADH
Answer: The answer is ACTH (adrenocorticotropic hormone)
Explanation:
ACTH, known as Adrenocorticotropic hormone, is a hormone secreted by the Anterior Pituitary gland. Its function is primarily to stimulates the adrenal cortex gland, which in turns release its own hormones generally known as Corticosteriods such as
- Aldosterone
- deoxycorticosterone etc
These corticosteriods exert several functions ranging from
- transport of electrolytes and distribution of water in tissues to
- metabolism of carbohydrates to release blood sugars; and break down of proteins and fats
Under stress, the anterior pituitary gland releases ACTH, which promotes the adrenal cortex to produce cortisol to maintain bodily functions, including retaining sodium and water, increasing blood sugar, and initiating fat breakdown.
Explanation:When the body is under stress, the anterior pituitary gland reacts by releasing ACTH (Adrenocorticotropic hormone). This hormone then stimulates the adrenal cortex which in turn produces cortisol. The release of cortisol into the bloodstream results in several reactions such as retaining sodium and water to increase blood volume, increasing blood sugar for energy, and the breaking down of fats for additional sources of energy. Therefore, the correct answer is C) ACTH.
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To study the effect of price on Brett's demand for rock climbing lessons economists hold his monthly income constant. This is an example of a(n) _______ assumption.
Question: To study the effect of price on Brett's demand for rock climbing lessons, we hold his monthly income constant. This is an example of a(n) _______ assumption.
a) e pluribus unum
b) ceteris paribus
c) carpe diem
d) carpe vinum
Answer:
To study the effect of price on Brett's demand for rock climbing lessons, we hold his monthly income constant. This is an example of a "ceteris paribus" assumption
Explanation:
The term is used in order to describe the phrase "all other things remaining constant". The concept is significant as in the real life it is difficult to separate variables which also effects and change the result of what we are reviewing. Example of these is the Law of the Gravity which says about the bathroom scale thrown out the window will fall to the ground.
To study the effect of price on Brett's demand for rock climbing lessons economists hold his monthly income constant. This is an example of a ceteris paribus assumption. Option 4.
Ceteris paribus is a Latin phrase meaning "all other things being equal" or "holding other things constant." This assumption is commonly used in economics to isolate the effect of one variable by controlling for other variables that might impact the outcome. For example, to determine how a change in price affects demand, economists would assume that all other factors, such as consumer income and tastes, remain unchanged.In the context of your question, by keeping Brett's income constant, economists can clearly see how changes in the price of rock climbing lessons alone affect his demand for these lessons. This isolated effect helps in understanding the direct relationship between price and quantity demanded without the interference of other changing factors.
To study the effect of price on Brett's demand for rock climbing lessons economists hold his monthly income constant. This is an example of a(n) _______ assumption.
carpe vinumepluribus unumcarpe diemceteris paribusIn North American society, categories such as age, ethnicity, gender, sexual orientation, disabilities, and religion are all considered ____________.
Answer:
social constructs
Explanation:
however it is not true that gender is actually a social construct
Self-insurance refers to: the practice of setting aside funds to pay for medical care expenses instead of paying premiums to an insurance company. Approximately, _______ of all employees who participate in group insurance plans work for firms that self-insure.
Final answer:
Self-insurance is a strategy where funds are set aside for medical expenses, offering an alternative to paying health insurance premiums to insurance companies. It requires significant financial stability and allows for customized healthcare coverage. A significant portion of employees in group insurance plans are with firms that self-insure.
Approximately, 60% of all employees who participate in group insurance plans work for firms that self-insure.
Explanation:
Self-insurance refers to the practice of setting aside funds to pay for medical care expenses instead of paying premiums to an insurance company. This method is an alternative to traditional health insurance plans where health insurance premiums are paid to insurance companies, which then manage the risks associated with healthcare costs. Employers especially find self-insurance an attractive option as it allows them to directly control their healthcare expenses, understand the specific health needs of their workforce, and tailor coverage accordingly. Despite its advantages, self-insurance requires significant financial stability and risk management strategies to be effective.
Regarding the proportion of employees who participate in group insurance plans and work for firms that self-insure, it's notable that a significant number choose this option. By managing their own insurance funds, firms can potentially gain savings on premiums and have greater flexibility in benefits administration.
Self-insurance refers to the practice of setting aside funds to pay for medical care expenses instead of paying premiums to an insurance company. Approximately, 60% of all employees who participate in group insurance plans work for firms that self-insure.
Self-insurance allows organizations to directly cover their employees' healthcare expenses, bypassing traditional insurance premiums.
By assuming the financial risk themselves, companies can potentially reduce costs by avoiding insurance company administrative fees and profit margins. It also provides greater flexibility in designing healthcare benefits tailored to employees' needs.
However, self-insurance also exposes companies to the risk of large medical claims, which could significantly impact their financial stability. Despite this risk, many organizations opt for self-insurance due to potential cost savings and the ability to have more control over healthcare benefits provided to employees.
How much blood does the human body contain? A. 1-3 pints B. 8-10 pints C. 12-14 pints D. 17-20 pints
Answer: The answer is . 8-10 pints
Explanation:
The body of the adult human contains Between 8-10 pints of blood.
The volume of blood in an average adult also account for its body weight.
I need help with this Punnett square Practice
Answer: First answer= 2:2; Second answer= 100%; 3rd answer= 9:3:3:1; 4th picture answer= 37.5%; 5th picture answer= 1:1:1:1
Explanation: phenotype refers to physical appearance, gynotype refers to genetic composition.
A Punnett square is a diagram used in genetics to predict the possible combinations of alleles in the offspring two individuals. It helps understand genetic inheritance patterns for traits. Punnett squares are valuable tool genetics.
Explanation:A Punnett square is a diagram used in genetics to predict the possible combinations of alleles in the offspring of two individuals. It is named after Reginald Punnett, who first described in 1906. Overall, Punnett squares are a valuable tool in genetics that help us understand how traits are inherited from parents to offspring.
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The _____ nervous system contain(s) the sensory and motor neurons connecting the CNS to the rest of the body.
Answer: The correct answer is peripheral
Explanation:
The Peripheral nervous system consists of the following:
- sensory neurons, which leads all parts of the body to the central nervous system
- motor neurons that runs the central nervous system to all parts of the body.
Thus, Peripheral nervous system is the answer
The Peripheral Nervous System (PNS) contains the sensory and motor neurons connecting the CNS to the rest of the body, acting as a communication relay between the CNS and the body's extremities.
Explanation:The Peripheral Nervous System (PNS) is the one that contains the sensory and motor neurons connecting the CNS (Central Nervous System) to the rest of the body.
The PNS basically serves as a communication relay going back and forth between the CNS and the extremities of the body. Sensory neurons send signals to the CNS from sensory organs, while motor neurons transmit commands from the CNS to the muscles and organs.
An example of this might be feeling a hot object and pulling your hand away. The sensory neuron registers the heat and sends a signal to the CNS, which then sends a command via the motor neuron to your muscles to pull your hand away.
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A state of physical, emotional, and mental exhaustion attributable to long-term involvement in emotionally demanding situations is called _____.
Answer: The answer is burnout
Explanation:
Burnout is a state of physical, emotional, and mental exhaustion attributable to long-term involvement in emotionally demanding situations at the place of work, residence etc
A researcher has introduced molecules of human myoglobin and human hemoglobin into a solution containing oxygen. Which of the following statements is true of human hemoglobin and myoglobin?
(Complete questions below).
ANSWER
→When introduced into an oxygen-containing solution, a single molecule of human myoglobin will bind to more oxygen molecules than a human hemoglobin molecule will.
Explanation:
Myoglobin(MB) and haemoglobin (HB) are oxygen binding pigments in mammals while Hb transports oxygen and other gases in the blood streams,Myoglobin stores maximum oxygen in the muscles. Thus this explains while it is possible to seize breath with no effects for few seconds.The oxygen storing capacity of myoglobin made it a higher binding oxygen pigments than haemoglobin. Hb does not store oxygen but transports it in the body.
Structurally,.Heamoglobin is made up of 4-Heme group; while myoglobin has 1 Heme group.The strong affinity and storage capacity for oxygen is due to non- bonding of distal HIistidine group (His 64) with iron atom.(iron ii) which gives enough flexibility for interactive reactions of Histidine with oxygen for maximum oxygen binding and storage,(the proximal histindine group(His-63) is bonded directly to the iron atom therefore no flexibity for bonding and stroge with oxygen..
Therefore 1 molecule of MB will bind to more oxygen molecules(MB02) , than 1 Hb molecule.,(Hb08) even at low concentration.
Complete Question.
A researcher has introduced molecules of human myoglobin and human hemoglobin into a solution containing oxygen. Which of the following statements is true of human hemoglobin and myoglobin?
Because myoglobin does not interact with oxygen molecules, only human hemoglobin will bind to oxygen molecules in this solution.
When introduced into an oxygen-containing solution, a single molecule of human myoglobin will bind to more oxygen molecules than a human hemoglobin molecule will.
When introduced into an oxygen-containing solution, human hemoglobin will bind oxygen molecules more tightly than human myoglobin.
Compared to human hemoglobin, human myoglobin will likely bind to oxygen molecules more quickly when introduced into an oxygen-containing solution.
When introduced into an oxygen-containing solution, human myoglobin and hemoglobin will behave similarly and will bind to the same number of oxygen molecules (with the same affinity).
What term means that an antimicrobial drug can injure/kill the target cell or organism without injuring the person receiving the drug?
Answer:
as the ability of a drug to injure a target cell/organism without injuring other cells/organisms in close contact
Applies to antimicrobial drugs, selective toxicity indicates the ability of an antibiotic to kill or suppress microbial pathogens w/o causing injury to host cell, so want selective toxicity in drugs
Explanation:
We can represent atoms by listing the number of protons, neutrons, and electrons-for example, 2p, 2n, 0, 2e - for helium. Which of the following represents the 18O isotope of oxygen?a. 6p+, 8n0, 6e-b. 8p+, 10n0, 8e-c. 9p+, 9n0, 9e-d. 7p+, 2n0, 9e-e. 10p+,8n0, 9e-
Answer:
B. 8 e-, 8p+, 10n0
Explanation:
For the Oxygen-18 isotope,
Mass number = atomic number + number of neutron
For an electrically neutral atom, the number of proton is the atomic number.
Mass number = number of proton + number of neutron
The mass of proton is the same as the mass of neutron but the mass of a electron is negligble.
For isotopes, atoms with the same atomic number but different neutron numbers, hence different mass numbers.
Mass number of O-18 = 18
Atomic number of oxygen = 8
Number of neutron = 18 - 8
= 10
Number of proton = 8
Number of electron = 8
Therefore, 8 e-, 8p+, 10n0
The 18O isotope of oxygen is represented by 8 protons, 10 neutrons, and 8 electrons. The 18O isotope of oxygen is represented by 8p+, 10n0, 8e-.
Explanation:The 18O isotope of oxygen can be represented as follows: 8p+, 10n0, 8e-. Here, 8 represents the number of protons and electrons, and 10 represents the number of neutrons. Isotopes of an element have the same number of protons (and hence the same atomic number), but a different number of neutrons. So, in the case of 18O, the atomic mass is 18 (sum of protons and neutrons), and there are 8 protons, thus leaving 10 neutrons.
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A risk factor for osteoporosis is a. early menopause. b. ovarian cysts. c. late menopause. d. endometriosis.
Answer:
The correct answer is a. early menopause.
Explanation:
Estrogen is the hormone that helps in the protection of bones from being lost or degraded. This hormone is released in the ovary by follicle. The level of estrogen decreases sharply when a woman reached its menopause.
This decrease in estrogen levels in females can lead to osteoporosis in women. So early menopause increases the chances of bone loss in woman and bone loss increases the chances of fractures in women. One in two women who are above 50 in America breaks a bone due to osteoporosis. Therefore the correct answer is a. early menopause.
Early menopause is a risk factor for osteoporosis. This is due to reduced levels of estrogen, a hormone critically involved in maintaining bone mass. Reduced estrogen levels lead to decreased calcium in the blood, which is then pulled from the bones, potentially leading to osteoporosis.
Explanation:A risk factor for osteoporosis is early menopause. As estrogen levels begin to wane in the years leading up to and following the onset of menopause, this crucial hormone's role in maintaining bone density becomes evident. Estrogen is involved in calcium metabolism, and without sufficient estrogen, levels of calcium in the blood decrease. To compensate, calcium is drawn from the bones, potentially reducing bone density and thus increasing the risk of osteoporosis.
Early menopause means a woman goes through this process sooner, leaving a longer period of her life when loss of bone mass can occur which increases the likelihood of developing osteoporosis. It's also important to mention that hormone replacement therapy (HRT) can be used to combat this, although it does come with potential negative side effects.
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Brandon is interested in the field of nursing, but does not currently have a lot of time or the financial resources for training. Which of the following nursing careers would be best for him to pursue at this time?
Answer:
License vocational nurse
Explanation:
A license vocational nurse also known as a license practical nurse works under the supervision of a qualified registered nurse or a physician providing bedside care to patients. They as well collect samples for testing in the laboratory, also they can as well deliver ,care and feed infants.
A licensed practical nurse can also supervise nursing assistants or aides.
Answer:A licenced Vocational Nurse
Explanation:
A licensed vocational nurse's duties revolve around basic patient care. LVNs monitor their patients' vital signs and keep their charts up to date. They assist patients in basic hygiene and personal care, including bathing and dressing them and helping them eat if necessary.
Which of the following features of Salmonella prevent it from being phagocytosed?
a. Flagella
b. Invasins
c. Fimbriae
Answer:
a. Flagella
Explanation:
Salmonella spp. is a motile enterobacteria with peritrichous flagella surrounding round the body of the bacterial organism. It is a type of bacterial infection that affects the walls of the gastrointestinal tracts. Movement in the gastrointestinal tracts is aided by the use of whip-like structure known as flagella and the use it as a defense mechanism from their host cells when they are about to be phagocytosized.
Phagocytosis is the action of using the plasma membrane to engulf a large partice, substance or organism in the cell.
Shulte chose several areas in the lower Chesapeake Bay as his experimental sites. At each site, he constructed artificial reefs of two different heights. He also left portions of each site unrestored to serve as points of comparison. Oysters were allowed to colonize the reefs and the unrestored bay bottom safe from harvesting. His hypothesis was that oysters would survive better in the plankton-rich upper waters away from the smothering sediments and hypoxic waters of the bay bottom.A) Reef type is the independent variable.B) Adult oyster density is a dependent variable.C) Spat density is a dependent variable.D) High-relief and low-relief reefs are treatments.
Answer:
All options are correct.
Explanation:
The scientific experiments require proper procedure and experimental set up to perform the experiments. The results and observation was used for the interpretation of the experiment.
The experiments include both the dependent variable, independent variable control and set-up. Here, Shutle used the adult oyster and reef types as dependent and independent variable. Reefs are used as treatments and Oyster density changes and included in the category of density dependent variable.
Thus, all given options are correct.
Restoration efforts by the Chesapeake Bay Foundation aim to increase oyster population density using experimental oyster reefs and disease-resistant strains, though interstate cooperation is required due to upstream pollution.
Oyster restoration efforts in the Chesapeake Bay have been crucial due to the sharp decline in oyster populations. Organizations like the Chesapeake Bay Foundation have focused on increasing oyster population density to improve reproduction rates. Utilizing disease-resistant oyster strains from the Virginia Institute of Marine Science, these restoration initiatives involve constructing experimental oyster reefs to combat problems such as pollution. However, efforts by states like Virginia and Delaware are challenged by pollution from upstream states, necessitating larger inter-state cooperation for a successful restoration. Moreover, understanding the impact of environmental factors on oyster health, such as anthropogenic noise, provides insights that can guide aquaculture practices and coastal development.
A particular plant species can reproduce both sexually and asexually. When samples of this plant are grown in an environment where a harmful bacterial pathogen is abundant, the plants that survive are likely to have been produced primarily through what type of reproduction?
Answer:
The plant should reproduce by sexual reproduction.
Explanation:
In asexual reproduction, the chances of variation becomes limited which decreases the chances of evolution of a species but in sexual reproduction the chances of variation in species increases which increases the evolution rate in sexually reproducing organisms.
So if a plant growing in an environment where harmful bacteria pathogen is abundant then the plant should reproduce sexually which will allow the production of genetically different offspring which will have a new allele that can resist the bacterial infection which is not possible in asexual reproduction due to lack of or slow variation.
Carbohydrates are stored in a plant's roots, but may also be released into the surrounding soil, where they feed the microbial community.
A. True
B. False
Answer:
A
Explanation:
Starch, an example of a class of carbohydrates known as polysaccharide is produced in the leaves by photosynthesis and transported to the roots of the plant for storage. Micro-organisms in the surrounding soil feed on starch released into the soil from the root
Answer:
A: true
Explanation:
Carbohydrates stored as starch in the roots of plants can also be released to the surroundings for microorganisms to feed.
Professor Stetson is conducting a study on memory with a sample of college students. Before they agree to participate, Professor Stetson tells them about the study and what they will do if they choose to participate. This is an example of:
Answer:
informed consent
Explanation:
When during a study the participants are told in detail about the procedure of the study along with possible risks, benefits and potential consequences and after gaining this knowledge a participant agrees to be a part of the study then it is said to be an informed consent.The medical and research ethics have made it mandatory to get informed consent from the participants before they enrol in any experimental procedure.The informed consent can be given either directly by the participant or if the participant is not in the condition to grant it then the parents or legal guardians can also provide it.Therefore, in the given case Professor Stetson is asking for an informed consent from the participants.Scientists have modified a clathrin molecule so that it still assembles but forms an open-ended lattice instead of a closed spherical cage. How would this clathrin molecule affect endocytosis in cells? Choose one: A Vesicles would be larger, increasing the cargo endocytosed. B. All movement of molecules into and out of the cell would cease. C. Vesicles cannot form properly without a clathrin cage, thus inhibiting endocytosis. D. Endocytosis would be unaffected, since adaptors and receptors can still interact.
Answer:
Vesicles cannot form properly without a clathrin cage, thus inhibiting endocytosis.
Explanation:
Clathrin is important for the vesicle fusion. These vesicles are important for the transport and secretion of the proteins from one cell compartment to the next compartment.
The clathrin proteins helps in the vesicle formation and form the close cage in the vesicle. This shape is important for the vesicles formation. The mutation in clathrin will disrupt the shape of the vesicle from the cage to the liner structure. This disrupts the endocytosis process and the protein transport will also blocked.
Thus, the correct answer is option (C).
Approximately 21% of the human genome is comprised of nucleotides containing C. Given this information, calculate the percentage of the human genome that is comprised of nucleotides containing G, T, and A.
(a) _____% of the human genome is comprised of G.
(b) _____% of the human genome is comprised of T.
(c) _____% of the human genome is comprised of A.
Enter your answer as three numbers separated by commas (example: 12, 26, 32).
Answer:
(a) 21% of the human genome is comprised of G.
(b) 29% of the human genome is comprised of T.
(c) 29% of the human genome is comprised of A.
Explanation:
According to Chargaff's rule, a DNA molecule has the same amount of pyrimidines (T and C) as purines (A and G), and G pairs with C and A pairs with T.
If 21% of the genome contains C, then 21% also contains G.
Therefore 21% + 21% = 42% of the genome is comprised of G+C.
The other 58% is comprised of A+T, and because they pair with each other, 29% will correspond to A and 29% will correspond to T,
Some volcanoes have explosive eruptions, like the one at Mount St. Helens in 1980. Eruptions like these can cause abrupt changes to Earth's surface. Which of these could result from an explosive volcanic eruption? A. Part of the volcano is blasted away. B. Volcanic ash covers the surrounding area. C. A flow of ash and debris rushes down the volcano's slope. D. all of these
Answer:
D
Explanation:
alpha helix and beta sheet secondary structure is located mainly in the interior of folded proteins whereas irregular loops occur on the outside_________________.
Answer:
of folded proteins
Explanation:
In Secondary structures; the irregular loops seems to be positioned on the outside of folded proteins while the Alpha and beta sheets is categorically positioned at the centre or interior of the protein.
The loops are positioned on the outside of folded proteins in order for the peptide bonds to be open to form H bonds with water.
When ejecting a protein sample into a well of the SDS-PAGE gel with a pipetter, why should you only push down on the pushbutton to the first stop and not the second stop?Select one:
a. Pushing down to the second stop will eject more sample than required.
b. The pushbutton should only be pushed down to the second stop when loading the sample into the pipetter.c. Pushing down to the second stop when loading the samples will not affectthe SDS-PAGE results.d. Pushing down to the second stop could denature the protein sample.e. Pushing down to the second stop will result in ejection of air from the pipet tip, which could blow the content intended for that particular well to the surrounding wells
Answer:
.e. Pushing down to the second stop will result in ejection of air from the pipette tip, which could blow the content intended for that particular well to the surrounding wells
Explanation:
The pipette has two stops the first and the second stop. The first stop is the one that changes in other words the amount that is set. The second stop is for extra push to remove all the liquid from the tip. When the pipette is pushed to the second stop some air is ejected.
This is the main reason when loading samples on wells during SDS-PAGE ,we stop at the first stop or else the contents will go to the neighboring wells.
With regard to the destruction of tropical forests, the focus is often on biodiversity and the impact to these ecosystems. What is a direct benefit to humans that helps explain why these forests need to be preserved?
Answer:
The diversity could contain novel drugs for consumers.
Explanation:
The biodiversity may be defined as the different types of the living organisms are present on this planet. The biodiversity depends on the factors like temperature and light.
The biodiversity shows unequal distribution on the earth. The biodiversity of the forests might provide the different types of flowers, fruits and wood that can directly be used by the other organisms. Different types of plant diversity may provide the different types of drug used for the disease treatment.
Thus, the answer is the diversity could contain novel drugs for consumers.
The given question is not complete as it lacks the option that are necessary to answer the question, however the appropriate options are as follows:
A) Natural and undisturbed areas are important wildlife habitats.
B) This diversity could contain undocumented insect species.
C) The diversity could contain novel drugs for consumers.
D) The plant diversity provides shade, which lowers global warming.
Answer:
The correct answer would be - option c. diversity could contain novel drugs for consumers.
Explanation:
Biodiversity is the total living organisms present in a particular ecosystem in loosely terms. The destruction of the tropical forest will be directly affected and their will be negative impact on the ecosystem.
These forests are need to be preserved because these forests are help in maintaining the ecosystem and provide several products. The one iof the direct benefits to the humans are these diversity could have various drugs that help consumers.
Thus, the correct answer is option C.