Consider the observation that serine is the amino acid residue that can be replaced by another amino acid with the least effect on protein structure and function. Which of the following is the most reasonable rationalization of this observation?

a. Serine is the amino acid residue that can be replaced with the least effect on protein structure and function.
b. Replacement of tryptophan causes the greatest effect on protein structure and function.
c. Replacements such as Lys→ and Leu → usually have very little effect on protein structure and function.

The question has incorrect option, however the question can be answered by the general explanation. On the basis of the general explanation the answer is as follows:

The correct answer is - Serine has a small side chain that can fit in any relatively polar environment.

Explanation:

Serine is an amino acid that have a small side chain in comparison of other amino acid and can be replaced by another amino acid with very least effect on the structure and function of a particular protein as they can fit in any relatively polar environment.

Serine have hydroxyl group in their side chain. It is polar amino acid that can easily establish itself in any polar condition and cause least changes in protein structure and function.

Thus, the correct answer is - Serine has a small side chain that can fit in any relatively polar environment.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )