An allele is an alternative form of a gene (in diploids, one member of a pair) that is located at a specific position on a specific chromosome. Diploid organisms, for example, humans, have paired homologous chromosomes in their somatic cells, and these contain two copies of each gene.
Which of the following statements about the nuclear envelope is false?
a) Nuclear pores are made up of a group of proteins that are collectively called the nuclear pore complex.
b) The nuclear envelope is continuous with the Golgi apparatus.
c) The nuclear envelope is composed of two lipid bilayers.
d) Molecules pass into and out of the nucleus through nuclear pores.
Answer:
b) The nuclear envelope is continuous with the Golgi apparatus.
Explanation:
The nuclear envelope is a nuclear membrane composed of two lipid bilayers: inner and outer membrane and perinuclear space between them. Its outer membrane is continuous with the endoplasmic reticulum. Nuclear pores that are part of this envelope allow the movement of molecules in and from the nucleus (e.g. mRNA formed during transcription should be transported into cytosol through the pores).
The cytoplasm that surrounds the nucleus of a neuron is called the
The cytoplasm that surronds the nucleus of a neuron is called the perikaryon.
The cytoplasm that surrounds the nucleus of a neuron is called the - perikaryon.
The nervous system has neurons and neuroglial cells. Neurons are used in transmitting information by electrical impulses. Neurons are structural and functional units of the nervous system.
Neurons:
It has mainly the cell body, the axon, and dendrites.The cell body has a nucleus and Nissl granules.Nissl granules are Ribosomes that take part in protein synthesis.the cell body is around the nucleus that contains cytoplasm.The nucleus is karyon so the cell body or cytoplasm that surrounds the nucleus is around and hence it is Perikaryon.Thus, the cytoplasm that surrounds the nucleus of a neuron is called the - perikaryon.
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Consider a mutation in which the change is from uac to uau. Both codons specify the amino acid tyrosine. Which type of point mutation is this?
The correct answer is: silent mutation
There are a few types of genetic mutation that can change genetic code. Those mutations can be classified:
1. Substitution-only one base is changed
• Nonsense mutations-when substitution leads to the formation of a stop codon instead of a codon
• Missense mutations-when one nucleotide is substituted and a different codon is formed
• Silent mutations-when a nucleotide is substituted and the same amino acid is produced
2. Insertion- extra base pairs are inserted
3. Deletion- section of DNA is deleted
This is a missense mutation, which is a type of point mutation where a single nucleotide is replaced, resulting in a change in the codon sequence. Despite the change, both the original and mutated codon still specify the same amino acid.
Explanation:This is an example of a point mutation called a missense mutation. In this mutation, a single nucleotide is replaced with another, resulting in a change in the codon sequence. Despite the change in the codon, both the original codon (UAC) and the mutated codon (UAU) still specify the same amino acid, tyrosine.
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Dna is located in the nucleus of the cell and makes up the_________
Dna is located in the nucleus of the cell and make up the chromosomes.
Every cell has a nucleus that carries DNA. In the DNA, thread-like structures are formed and are known as chromosomes. The chromosome are coiled up and tightly wrap around proteins.
DNA is in the nucleus of the cell and forms the organism's genetic material. It contains the information needed for growth, development, and reproduction. The genetic material is organized into structures called chromosomes.
Explanation:DNA, which stands for deoxyribonucleic acid, is located in the nucleus of the cell and makes up the genetic material of the organism. It is a molecule that contains information that an organism needs for growth, development, functioning, and reproduction. This genetic material is organized into structures called chromosomes. For example, in humans, DNA is organized into 23 pairs of chromosomes.
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Fiber is composed of long polysaccharide chains and offers many health benefits. Match the definition with the type of fiber.
A part of plants consumed in food:
Added to food and is the form in fiber supplements:
Does not dissolve in water:
Soluble and viscous (forms a gel when wet):
Insoluble fiber
Soluble fiber
Functional fiber
Dietary fiber
Dietary fiber refers to the part of plants consumed in food. Functional fiber is the form added to food and found in fiber supplements. Insoluble fiber does not dissolve in water, while soluble fiber becomes viscous or gel-like when wet.
Explanation:The question is about different types of fiber and their characteristics.
Dietary fiber is a part of plants consumed in food.
Functional fiber is added to food and is the form in fiber supplements.
Insoluble fiber does not dissolve in water, whereas
soluble fiber is soluble and viscous, meaning it forms a gel when wet. These various forms of fiber all play a role in maintaining healthy physiological functions.
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Dietary fiber is the type of fiber that is a part of plants consumed in food. Soluble fiber dissolves in water and forms a gel-like substance in the digestive system, while insoluble fiber does not dissolve in water and adds bulk to the stool. Functional fiber refers to fiber added to food and found in fiber supplements.
Explanation:The type of fiber that is a part of plants consumed in food is called dietary fiber. It is found naturally in foods such as fruits, vegetables, whole grains, and legumes.
Soluble fiber is the type of fiber that dissolves in water. It forms a gel-like substance in the digestive system, which can help to lower cholesterol and control blood sugar levels. Examples of foods rich in soluble fiber include oats, barley, beans, and fruits.
Insoluble fiber is the type of fiber that does not dissolve in water. It adds bulk to the stool and helps to prevent constipation. Foods high in insoluble fiber include whole wheat bread, brown rice, nuts, and vegetables.
Functional fiber refers to fiber added to food and found in fiber supplements. It is not naturally present in foods, but is added for its beneficial effects on health.
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Which of the following best describes the ploidy level of a fertilized embryo sac? A) All cells are diploid. B) All cells are triploid. C) All cells are polyploid. D) The ploidy level varies among species. E) There are haploid, diploid, and triploid cells.
e. There are haploid, diploid, and triploid cells.
A gene that codes for resistance to glyphosate, a biodegradable weed killer, has been inserted into certain plants. as a result, these plants will be more likely to
These weeds will be more likely to survive than others if glyphosate is present
Answer:
The options in the question are missing, the options are:
(1) produce chemicals that kill weeds growing near them
(2) die when exposed to glyphosate
(3) convert glyphosate into fertilizer
(4) survive when glyphosate is applied to them
The answer is 4
Explanation:
According to the question, glyphosate is a weed killer (herbicide) i.e. it kills plants when applied to them. However, when a gene that codes for resistance to glyphosate is inserted into the genome of certain plants, the gene confers resistance to glyphosate on the plants.
This resistance makes the plants with the resistant genes to survive whenever glyphosate is applied to them as the herbicide will no longer be effective against the plants with the resistant gene.
In the lungs, oxygen diffuses into the bloodstream, and carbon dioxide diffuses out through _[blank]_.
veins
alveoli
arteries
kidneys
the answer is avoli, because they are the smallest part of the lungs so the carbon dioxide goes back through the blood stream to be reoxygenated by the pulmonary system.
Answer:
The alveoli
Explanation:
How many hydrogen bonds are found between a-t
The correct answer is two hydrogen bonds between adenine and thymine (the bond is thus weaker and longer) and three between cytosine and guanine.
A hydrogen bond is a bond formed between a hydrogen (H) atom and electronegative atom or group, such as nitrogen (N), oxygen (O), or fluorine (F).
Hydrogen bond is found in the double helical structure of DNA between its base pairs. Guanine is complementary linked with cytosine and adenine with thymine. Thanks to hydrogen bonds one complementary strand is connected to the other and replication is enabled.
Consider the following family history: Bob has a genetic condition that affects his skin. Bob’s wife, Eleanor, has normal skin. No one in Eleanor’s family has ever had the skin condition. Bob and Eleanor have a large family. Of their eleven children, all six of their sons have normal skin, but all five of their daughters have the same skin condition as Bob. Based on Bob and Eleanor’s family history, what inheritance pattern does the skin condition most likely follow? View Available Hint(s) Consider the following family history: Bob has a genetic condition that affects his skin. Bob’s wife, Eleanor, has normal skin. No one in Eleanor’s family has ever had the skin condition. Bob and Eleanor have a large family. Of their eleven children, all six of their sons have normal skin, but all five of their daughters have the same skin condition as Bob. Based on Bob and Eleanor’s family history, what inheritance pattern does the skin condition most likely follow? autosomal dominant X-linked dominant Y-linked autosomal recessive X-linked recessive
The inheritance pattern of the skin condition in Bob's family is most likely X-linked dominant, as all daughters have it (inheriting the X chromosome from Bob) but none of the sons do.
Explanation:Based on Bob and Eleanor's family history, the inheritance pattern of the skin condition is most likely X-linked dominant. This is because all of the daughters, who would have received Bob's X chromosome, have the condition while none of the sons do. This implies that the condition is carried on the X chromosome, and is dominant because it manifests in all the daughters who possess a single copy of the mutated gene. In X-linked dominant conditions, a father cannot pass the trait to his sons (as he contributes the Y chromosome), but can pass it to all of his daughters.
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The skin condition in the family follows an X-linked dominant inheritance pattern. This is evident because only the daughters, who each inherited an X chromosome from Bob, have inherited this skin condition. Understanding such inheritance patterns helps predict the likelihood of offspring inheriting a genetic disorder.
Explanation:Based on the provided family history, the skin condition in this family follows an X-linked dominant inheritance pattern. In such a pattern, an abnormal allele for a genetic condition present on the X chromosome is dominant over a normal allele. Here, Bob, who has the condition, has passed on this abnormal gene to all his daughters, because each of his daughters receives his X chromosome. His sons, on the other hand, receive his Y chromosome, so they don't inherit the condition.
For a pattern to be classified as X-linked dominant, it is sufficient for an affected father to pass on the condition to all his daughters. This pattern differs from autosomal dominant inheritance, where the offspring of either sex can inherit the condition when one parent is heterozygous and the other is homozygous for the normal gene.
The study of such inheritance patterns, which form a key part of human genetics, can help predict the likelihood of a couple's offspring inheriting a genetic disease or disorder.
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Which of the following stimuli is the most powerful respiratory stimulant to increase respiration?
A) arterial pH
B) an increase in blood pH
C) rising carbon dioxide levels
D) a rise in body temperature
Rising carbon dioxide level in the blood is mainly due to increased respiration in tissues. The carbon dioxide excreted by cells dissolves in blood plasma producing carbonic acid that lowers blood pH. A homeostatic response of the body will be increase respiration rate to expel the excess carbon dioxide from the body so as to maintain a normal 7.35-7.45 pH.
Which of these statements about the hip joint is false? It permits circumduction.
it permits circumduction
The false statement about the hip joint is: b. It has a biaxial design.
However, stating that the hip joint has a biaxial design is incorrect. The hip joint is a ball-and-socket joint, which means it allows movement in multiple directions, not just two. It permits movements such as adduction, abduction, flexion, extension, internal rotation, and external rotation.
a. The hip joint permits adduction, which is the movement of the thigh toward the midline of the body.
c. The hip joint permits flexion, which is the movement of bending the thigh toward the abdomen.
d. The hip joint permits extension, which is the movement of straightening the thigh backward.
Therefore, the correct statement would be that the hip joint has a multiaxial or triaxial design rather than a biaxial one. Additionally, all hip joints in humans permit circumduction due to their structure and the muscles that act upon them.
The complete question is:
Which of these statements about the hip joint is false?
a. It permits adduction.
b. It has a biaxial design.
c. It permits flexion.
d. It permits extension.
Definition: This is the end result of mitosis. One mother cell produces two exact copies or daughter cells.
I believe the answer would be genetic continuity.
Answer:
Genetic continuity
Explanation:
Genetic continuity, in one part, refers to the process of asexual cell division (mitosis) in ensuring that daughter cells have the same number of chromosomes and genes as the parent cells.
On the other part, it refers to the process that keeps the number of chromosome constant from generation to generation in sexually reproducing organisms.