Suppose that a glutamine residue in the active site of an enzyme was mutated to alanine. as expected, the alanine mutant was inactive, suggesting that the glutamine residue was critical to the catalytic mechanism. which mutation is most likely to restore wild-type level of activity to the alanine mutant? a. a to mb. a to nc. a to fd. a to ke. a to e

it would be a gas formation

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.