Answer:
Microtubules.
Explanation:
The main cytoskeleton of the cell is micro tubules, micro filaments and intermediate filaments. This structure helps to provide the stability and maintains the cell shape.
Microtubules are made of the polymers of tubulin. The microtubules are hollow shape like protein that forms the main part of the cyoskeleton. The microtubules maintains the cell shape and allows the movement of the cellular organelles of the cell.
Thus, the correct answer is microtubules.
b. the mutation remains with the cell and is passed on in division
c. the protein is psubstituted with a mutation
d. the mutation becomes part of the protein
Answer:
Test Crosses. A test cross is utilized to decide the genotype of a person with a attribute.
Explanation:
Brainliest?
Answer:
In the α helix structure, there is a hydrogen bonding between oxygen atom in a carbonyl of one amino acid and the hydrogen atom of the amino group that is situated four residues farther along the polypeptide chain
Explanation:
The common secondary structure of protein are: α helix and β pleated sheet
α helix is a rod like structure.It is a right handed coil of amino acid residue on a polypeptide chain, which may be 4 units or 40 units long. The coil is held together by hydrogen bond between oxygen atom in a carbonyl of one amino acid and the hydrogen atom of the amino group that is situated four residues farther along the polypeptide chain. This means that every complete turn of the helix is only 3.6 residues.
In an alpha helix, hydrogen bonds are formed between the carbonyl oxygen of one amino acid and the hydrogen attached to the nitrogen atom of another amino acid that is four residues away in the same polypeptide chain. This results in the characteristic spiral structure of an alpha helix.
In an alpha helix, a type of secondary structure in proteins, there is a specific pattern of hydrogen bonding that helps maintain its spiral shape. The hydrogen bond is formed between the carbonyl oxygen (C=O) of one amino acid and the hydrogen (H) attached to the nitrogen atom (N-H) of another amino acid that is four residues away in the same polypeptide chain. This repeated pattern of hydrogen bonding results in the characteristic spiral structure of the alpha helix. In terms of polypeptide numbering, if the amino acid at position n in the chain forms a hydrogen bond, then it does so with the amino acid at position n+4. This bonding pattern, along with the characteristics of the specific amino acids involved, contributes to the overall stability and function of the protein.
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b. clay
c. sand
d. loam
The type of soil that holds the most water is clay. Therefore, the correct option is B.
Compared to sand or silt particles, soil particles are smaller and have a larger surface area. As a result, clay soils are able to hold more water. Because clay has the ability to retain moisture by capillary action, fine particles within the soil can hold water in the spaces between them. This capillary action allows clays to absorb and hold water for longer periods of time, which allows them to hold more water than other types of soil. Clay soil has smaller gaps between particles and is better at holding water than sand and silt soils, which have larger particles and more room for water to pass through.
Therefore, the correct option is B.
Learn more about Clay soil, here:
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b.an increase in oxygen levels in the blood
c.a decrease in the rate of cellular respiration
d.an increase in carbon dioxide levels in the blood?
Answer: The correct answer is D) An increase in carbon dioxide level in the blood.
During exercise, contraction of muscles take place very quickly as they work harder during exercise. As more oxygen is required to burn calories efficiently, the demand for oxygen supply increases.
When we start exercising, body temperature increases as the rate of cellular respiration also increases.
An increase in carbon dioxide in the blood causes increase in heart rate as there is more demand of oxygen for efficient contraction of the muscles.