What role does helicase play in DNA replication? A.Helicase bonds together pieces of DNA as new strands form. B.Helicase connects the floating nucleotides to the template strands. C.Helicase breaks the hydrogen bonds and unwinds a section of DNA. D.Helicase checks the base pairs in each new strand of DNA.
Answers
The role of helicase in DNA replication is option C. Helicase breaks the hydrogen bonds and unwinds a section of DNA.
What role does helicase play in DNA replication?DNA helicase is an ATP-dependent catalytic enzyme that unwinds the dsDNA for providing leading as well as lagging strand replication. It runs ahead of the replication fork and continuously unwinds the dsDNA, providing the template for DNA polymerase to work.Unwinding the double-stranded nucleic acid (DNA/RNA) is a major function of any helicase subclass enzyme. In DNA replication, the helicase works by creating a complex with other proteins such as DNA primase, polymerase, or single-stranded-binding proteins. During replication, the helicase unwinds the dsDNA as we discussed above. Apart from this, several other functions are also performed by the helicase which is enlisted below,During DNA repair, the helicase unwinds or opens the dsDNA for repairing damaged DNA strands. During the translation, it breaks the hydrogen bonds between the DNA-RNA hybrid.The correct option exists C because Helicase stands for the enzyme that unwinds the DNA by breaking hydrogen bonds between the two strands and creating a replication fork.
Hence, option C. Helicase breaks the hydrogen bonds and unwinds a section of DNA.
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Related Questions
A doctor notices that a patient is having difficulty absorbing nutrients. Which area in the diagram of the alimentary canal above is the likely location of the problem?
A) A the mucosa
B) B the mucosa
C) C the serosa
D) D the serosa
Answers
Answer:
I think that the answer is A
A patient is having difficulty absorbing nutrients. A) A the mucosa
A condition called malabsorption syndrome means your body isn't able to take in many of the nutrients from the food you eat. This digestive problem can lead to symptoms such as bloating and diarrhea.
What is it called when can't absorb nutrients?Malabsorption is difficulty in the digestion or absorption of nutrients from food. Malabsorption can affect growth and development, or it can lead to specific illnesses. Some of the causes of malabsorption include: Cystic fibrosis (the number one cause in the United States) Chronic pancreatitis.
What causes body to not absorb nutrients?Factors that may cause malabsorption syndrome include: damage to the intestine from infection, inflammation, trauma (injury), or surgery. prolonged use of antibiotics. other conditions such as celiac disease, Crohn's disease, chronic pancreatitis, or cystic fibrosis.
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Which of the following describes what happens in the second step of photosynthesis?
A.Electrons bond hydrogen atoms to oxygen molecules to form a carbohydrate molecule.
B.Electrons bond hydrogen atoms to carbon dioxide molecules to form a carbohydrate molecule.
C.Electrons bond hydrogen atoms to carbon monoxide atoms to form a carbohydrate molecule.
D.Electrons bond hydrogen atoms to carbon dioxide atoms to form a carbohydrate molecule.
Answers
Answer:
B. Electrons bond hydrogen atoms to carbon dioxide molecules to form a carbohydrate molecule.
Explanation:
In the second step of photosynthesis electrons bond hydrogen atoms to carbon dioxide molecules to form a carbohydrate molecule.
The second phase of photosynthesis takes place in the stroma. Six carbon dioxide molecules enter the cycle and bond with hydrogen atoms to produce one molecule of glucose or sugar.
This type of reproduction produces a new cell or organism that is an exact genetic copy of its parent:
Answers
Answer:
asexual reproduction
Explanation:
Asexual reproduction is a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes.
The term life cycle includes the entire process of:
adults defending their young
providing a conducive environment
adults producing gametes
fertilization
the growth of the offspring to adulthood
Answers
Answer:
The term life cycle includes the entire process of: the growth of the offspring to adulthood
Where is the female part of a plant located?
A.in the pollen
B.in the roots
C.in the stem
D.inside the flower
Answers
Answer:
A.in the pollen
Explanation:
Pistil is the female reproductive part of a flower. However, it is located in the pollen.
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Which is an example of codominance?
PLZZZZZZ HELPP LAST QUESTION!!!!!
A.A dog with white fur and a dod with black fur mate and produce a dog with both white and black fur.
B. A purple flowerd tree and a white flower tree mate and produce a pink flowerd tree.
C. A sheep with white fur and a sheep with black fur mate and produce a sheep with gray fur.
D. A person with blue eyes and a person with brown eyes mate and have a child with brown eyes.
Answers
Answer:
Should be A.
Explanation:
Codominance is when they have both, not a mixture of the traits or a single dominate trait.
The example of codominance is a dog with white fur and a dog with black fur mate and produce a dog with both white and black fur. Thus, the correct option is A.
What is Codominance?Codominance is a type of inheritance in which two versions or alleles of the same gene are expressed separately in an individual to yield different traits in the organism.
In codominance, a heterozygous condition is observed in which both the alleles at a gene locus are fully expressed in the phenotype of the organism.
An example of codominance is a dog with white fur and a dog with black fur mate and produce a dog with both the white and black fur.
Therefore, the correct option is A.
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Specific heat is the amount of heat required to raise the temperature of a material by 1°C per what unit?
A. volume
B. joule
C. mass
D. pressure
E. density
Answers
Answer:
The answer would be C: Unit of Mass
Answer:
C. mass
Explanation:
Specific heat is defined as the amount of heat energy required to elevate the temperature of a material by 1°C per unit mass.
It is a physical property of a material. The standard international unit of heat capacity is joule per kelvin per kilogram (J/K/Kg).
If a substance has a high specific heat then it simply means that it will take very long to get heated but once heated it will take very long time to cool down either.
Water has highest specific heat.
What happens when an oceanic and a continental plate collide? the continental plate sinks below the oceanic plate the oceanic plate sinks below the continental plate mid-oceanic ridges are formed the two plates break from the force
Answers
Answer:
The oceanic plate sinks below the continental plate
Explanation:
When there's a collision between an oceanic and continental tectonic plates, we have a convergent plate boundary. The continental plate is less dense, it is higher, and it is thicker, while the oceanic is denser, lower positioned, and less thick. This results in the oceanic plate to sink below the continental plate, in a process known as subduction. As the oceanic plate moves below the continental plate the area around the boundary is lifting up, resulting in the formation of mountain chains. There's also a great deal of volcanic activity along the boundary, often resulting in the formation of volcanic island chains, and the earthquakes are also very common as there's lot of adjustment going on in the crust.
Answer:
The oceanic plate sinks below the continental plate
Explanation:
Fungi can't produce their own energy but instead take in nutrients from their environment. This makes fungi
A. heterotrophs.
B. chemotrophs.
C. mixotrophs.
D. autotrophs
Answers
Fungi, like animals, are heterotrophs and get their food from the environment.
Plants, on the other hand, are autotrophs. Autotrophs are organisms that make their own food from photosynthesis or chemosynthesis.
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Which of the following would you need in order to compare the effect of two different fertilizers on plant growth?
a. a way to measure plant growth
b. a cardboard box to cover one plant
c. a variety of plant species
d. a selection of soil types
Answers
Answer:
a wayto measure plant growth
The carrier molecules of the electron transport system are located in the
Answers
Answer:
Inner mitochondrial membrane
Explanation:
What part of your brain controls your emotions
Answers
emotions Are carried out by the limbic system, which is located in the temporal lobe.
Answer:
limbic system
Consider the following process;
1. Sensory nerves signal that you are hungry.
2 You eat.
3. Food is broken down into nutrients.
4. Nutrients enter your blood.
Which of these body system does not work with your nervous system in this process?
A. The Digestive System
B. The Muscular System
C. The Skeletal System
D. The Immune System
Answers
Final answer:
In the process of digesting food, the Immune System does not work directly with the nervous system; the Digestive, Muscular, and Cardiovascular systems do.
Explanation:
When considering the process of feeling hunger, eating food, digesting it, and absorbing nutrients, several body systems work in conjunction with the nervous system. The Digestive System breaks down food into nutrients. The Muscular System is involved in the physical act of eating and the movements required for digestion. The Cardiovascular System is essential for delivering the absorbed nutrients to cells throughout the body. Among the options provided, The Immune System is the one that does not directly interact with the nervous system in this digestive process.
Therefore, the correct answer is D. The Immune System.
Which of the following is true? Select one: a. More ATP is generated from the metabolism of a glucose molecule than a fatty acid molecule b. More ATP is generated from the metabolism of an amino acid molecule than a fatty acid molecule c. More ATP is generated from the metabolism of a fatty acid than a glucose molecule d. The metabolism of a fatty acid molecule, glucose molecule, or amino acid molecule generates the same amount of ATP. e. The metabolism of a fatty acid molecule and glucose molecule generate the same amount of ATP, but an amino acid molecule generates less ATP
Answers
Answer:
The only true statement in the options given is this: MORE ATP IS GENERATED FROM THE METABOLISM OF A FATTY ACID THAN A GLUCOSE MOLECULE.
Explanation:
Glucose is the primary source of fuel for the living cells. Cells break down glucose to obtain energy which they use to carry out their life activities. The other major macro nutrients apart from glucose are fatty acids and proteins. When glucose is not available for cells' use, fatty acid and protein can be converted to glucose through the process of gluconeogenesis.
All though all the three macro molecules can produce energy, fat is the one that produce the highest amount of energy; each gram of fat supplies about 9 calories while glucose supply 4 calories and protein supply less than 4 calories.
Thus, more ATP is generated from the metabolism of fatty acid than a glucose and protein molecules.
The presence of iron oxides in rocks, formed during a specific time period, can be used as evidence of oxygen in the atmosphere during that time period.
Question 18 options:
True
False
Answers
Answer:
True
Explanation:
Iron oxides can only form naturally in the presence of oxygen as shown the formulae below:
2Fe(II) + O2 → 2FeO
4Fe(III) + 3O2 → 2Fe2O3
The presence of naturally occurring iron oxides can, therefore, be a significant indicator of the presence of oxygen in the atmosphere.
Why do people have swollen lymph nodes when they are sick?
Answers
Answer:
More white blood cells are produced.
Explanation:
What is the function of the nucleus in the euglena cells you observed?
Answers
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The nucleus in Euglena cells is responsible for housing the genetic material, which includes DNA that serves as instructions for cell function, as well as controlling metabolism and reproduction. It is enclosed by the nuclear envelope, which regulates the exchange of materials with the rest of the cell.
The nucleus of a Euglena cell, much like in other eukaryotic cells, serves a critical role in maintaining the life processes of the organism. Its primary function is to house most of the genetic material, which includes the cell's DNA. This DNA acts as a set of instructions for the cell, dictating how to synthesize the necessary molecules for cell function, including proteins and RNA. Additionally, the nucleus commands the metabolism and reproduction of the cell. The DNA within the nucleus tells the Euglena cell how to build the molecules it requires for survival and directs the overall activity within the organism. The nuclear envelope, a double membrane structure, encloses the nucleus and controls what substances enter and exit the nucleus through nuclear pores, ensuring proper cellular regulation. Understanding the nucleus's function provides insight into how eukaryotic cells manage their biological processes and maintain homeostasis.
The oxygen consumed during cellular respiration is involved directly in which process or event?
Answers
The oxygen consumed during cellular respiration is directly involved in the electron transport chain. During this final stage of cellular respiration, oxygen acts as the final electron acceptor and combines with electrons and hydrogen ions to form water, releasing energy that is used to produce ATP.
Explanation:The oxygen consumed during cellular respiration is directly involved in the process known as the electron transport chain, which is the final stage of cellular respiration that occurs in the mitochondria. In this process, oxygen accepts electrons that have been passed through a series of proteins in the mitochondrial membrane. This series of reactions occurs inside the mitochondria and is known as oxidative phosphorylation. Oxygen acts as the final electron acceptor and combines with the electrons and hydrogen ions to form water, releasing energy in the process. This energy is then used to produce ATP, the molecule that provides energy for cellular functions.
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What would most likely cause the cycle to continue? An explanation inspires new questions and the process of making new observations. A fact inspires new questions and the process of making new observations. A careful systematic process is used in experiments to gather observations and data. A fact is established and more data is needed to convince scientists that it is true.
Answers
Answer:
An explanation inspires new questions and the process of making new observations.
Explanation:
Answer:
The correct answer is option an explanation inspires new questions and the process of making new observations
Explanation:
New things are being discovered and invented in a scientific field due to the "skeptical nature of humans" that is asking the questions.
The basis of scientific revolution is that a new question can be derived from the explanation of the earlier answered scientific hypothesis as the explanations consists of the data obtained after the assumptions, observations and related experiments. This generates new ideas of 'if and but conditions" in the mind which leads to the formation of a new hypothesis thus continuing the cycle of a a scientific research.
Thus, option an explanation inspires new questions and the process of making new observations is the correct option.
A friend tells you that he is going on a low-carb diet to lose weight because he thinks that carbs contain more energy than fats or protein. what would you tell your friend about his plan?a friend tells you that he is going on a low-carb diet to lose weight because he thinks that carbs contain more energy than fats or protein. what would you tell your friend about his plan?
Answers
Final answer:
While fats contain the most energy per gram, low-carb diets can lead to significant short-term weight loss. However, it's crucial to maintain nutritional balance and consider the long-term sustainability and health implications of such a diet.
Explanation:
He may be under the misconception that carbohydrates contain more energy than fats or protein. In actuality, fats contain the most energy at about 9 calories per gram, while carbohydrates and proteins both contain about 4 calories per gram. However, there is some merit to a low-carb diet for weight loss.
Research has shown that low-carbohydrate diets, like Atkins or keto, can lead to significant weight loss, sometimes more so than low-fat diets or those higher in carbs. This is in part because low-carb diets can reduce appetite, leading to a lower calorie intake without the need for calorie counting.
One critical aspect to consider is the nutritional balance and sustainability of this diet. A diet rich in protein and low in carbohydrates can be low in calories if food choices are limited, which may not be sustainable in the long term. It's also important to ensure that by cutting carbs, your friend doesn't miss out on other vital nutrients.
Lastly, studies indicate that while low-carb diets may offer quick results for weight loss initially, their long-term efficacy and health benefits compared to other balanced diets are still under debate. Encouraging a balanced diet including carbohydrates, proteins, and fats alongside a healthier lifestyle might be more beneficial over the long term.
Which correctly identifies the location of the asteroid belt?
Question 1 options:
A
B
C
D
Answers
Answer:
the correct choice is B
located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets.
Answer: Option (2)
Explanation: In the given image, the asteroid belt lies in the B position i.e. between the orbits of Mars and Jupiter.
Asteroid belts contains infinite number of asteroids, that ranges in size from a few meter to hundreds of kilometers. They normally moves at a speed of about 80,000 km/hr and continuous collision between them takes place. Some of them even have satellites and most of them that are found to exist on earth are derived actually from that asteroid belt.
The, the correct answer is option (2).
Mosquitoes can often transmit viruses from one organism to another, acting as _______ of the virus.
A. parasites
B. symbionts
C. vectors
D. bacteriophage
Answers
Answer:
the answer is c
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What is the term for the programmed death of cells?
a. carcinogen
b. apoptosis
c. cyclin
d. kinase
Answers
the term for the programmed death of cells is apoptosis.
Answer:
Apoptosis
Explanation:
When a cell has become old or is unwanted due to defect, it self destructs via a programmed cell death procedure called apoptosis. This is essential in balancing the fast replacement of newer cells to those that are old or diseased. It occurs through several biochemical steps. The first thing that happens is blebbing of the cell mebrane (buldging out), the cell then shrinks and the nucleus becomes fragmented releasing its contents. There will be condensation of the cnromatin material and the last step is DNA fragmentation. A cell then becomes dead and is picked up by a macrophage for further breakdown.
Fats obtained from a variety of foods are essential nutrients but may be harmful to the body in some forms. Are healthy fats that have at least one double bond in the fatty acid chain. Most are artificially hydrogenated fats that have detrimental effects on health.
Answers
Answer:
Saturated fats
Explanation:
Because if you eat too much it could make you sick.
Fats obtained from a variety of foods are essential nutrients but may be harmful to the body in some forms b) unsaturated fat are healthy fats that have at least one double bond in the fatty acid chain. Most c) trans fat are artificially hydrogenated fats that have detrimental effects on health.
Unsaturated fats are healthy fats that have at least one double bond in the fatty acid chain. These fats are generally found in foods like fish, nuts, and vegetable oils and are considered beneficial for heart health.
The majority of trans fats are synthetically hydrogenated fats with harmful health consequences. They have been connected to an elevated risk of heart disease and are commonly present in processed meals.Trans fats have the ability to increase LDL ("bad") cholesterol and decrease HDL ("good") cholesterol levels.Another kind of fat that is solid at room temperature and is typically derived from animal sources is saturated fat. Heart disease is also linked to a high consumption of saturated fats.complete question:
Fats obtained from a variety of foods are essential nutrients but may be harmful to the body in some forms. _____ are healthy fats that have at least one double bond in the fatty acid chain. Most ______ are artificially hydrogenated fats that have detrimental effects on health.
-saturated fat
-unsaturated fat
-trans fat
Which statement(s) are true about metamorphosis: multiple choice.
it is a highly complex genetic process
it is completely governed by preexisting genetic information received by the zygote
it is a form of accelerated evolution
Answers
Which lipid consists of two fatty acid chains and a phosphate group?
Answers
Answer:
Phospholipids consist of a glycerol molecule, two fatty acids, and a phosphate group.
Explanation:
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Answer:
Phospholipids consist of a glycerol molecule, two fatty acids, and a phosphate group that is modified by an alcohol. The phosphate group is the negatively-charged polar head, which is hydrophilic. The fatty acid chains are the uncharged, nonpolar tails, which are hydrophobic.
Explanation:
When one part of a car fails the rest of the car doesn’t run properly?
Answers
Answer: depends
Explanation:
Depending what part of the car doesn't run properly because if it's the transmission/engine then yes it will not work, if its q window or something minor then no the car will be perfectly fine :)
An acute staphylococcal infection with blister-like lesions containing millions of virulent bacteria is known as
Answers
Answer:
Impetigo.
Explanation:
Impetigo is the condition caused by bacterial infection and shows yellow crust on the patient's arms, legs and face. Antibiotics are useful in the treatment of impetigo.
Impetigo is caused by the bacteria Staphylococcus aureus. Acute infection with bacteria can cause large blister like lesions in the armpits or groin. These lesion contain millions of virulent bacteria.
A double-stranded DNA molecule is being transcribed, only part of which is shown below. If the molecule is translated from left to right, one of the nucleotides shown in bold would be the first transcribed in this small molecule. Which of the following is the correct mRNA produced from the transcription of this DNA molecule? 5'-AUGAUCGGAUCGAUCCAU-3' 3'-UACUAGCCUAGCUAGGUA-5' 5'-UACUAGCCUAGCUAGGUA-3' 3'-AUGAUCGGAUCGAUCCAU-5'
Answers
3’UACUAGCC...
In transcription, DNA is transcribed into mRNA using a template strand of DNA. Here, the template strand is 3'-UACUAGCCUAGCUAGGUA-5' and the resulting mRNA sequence is 5'-AUGAUCGGAUCGAUCCAU-3'. This process is consistent with the complementary base pairing system observed in transcription, where Uracil (U) is used in mRNA instead of Thymine (T) in DNA.
Explanation:The process in question here is the transcription of DNA to mRNA; a core aspect of molecular biology. Looking at the provided double-stranded DNA molecule, and if we are considering the molecule to be translated from left to right, the DNA strand used as a template for transcription would be: 3'-UACUAGCCUAGCUAGGUA-5'. In this case, the A base pairs with U, U with A, G with C, and C with G, resulting in an mRNA sequence that mirrors the DNA sequence: 5'-AUGAUCGGAUCGAUCCAU-3'. This is due to the fact that, within transcription, DNA and RNA operate on a complementary base pairing system, with a notable difference: thymine (T) in DNA is replaced by Uracil (U) in mRNA.
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When doing blood testing for a viral infection, the procedure can be made more efficient and less expensive by combining partial samples of different blood specimens. If samples from three people are combined and the mixture tests negative, we know that all three individual samples are negative. Find the probability of a positive result for three samples combined into one mixture, assuming the probability of an individual blood sample testing positive for the virus is 0.03.
Answers
Answer:
The best way to approach this type of problem is to use the "complement method" ...
P(positive result) = 1 - P(negative result)
= 1 - (1 - 0.03)^3
= 1 - 0.97^3 = 0.087327 or 8.7%
Explanation:
Answer:
[tex]0.087[/tex]
Explanation:
Given -
Probability of positive blood sample for an individual is equal to 0.03
Number of sample is equal to three
Now , probability of getting a positive result for three sample combined into one single mixture is equal to
[tex]1 - (P)^ 3[/tex]
where P represents the probability of getting all individual negative test result
Substituting the given values in above equation, we get
[tex]P_{mixture} = 1 - (1-0.03)^3\\P_{mixture} = 1- (0.97)^3\\P_{mixture} = 0.087[/tex]