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

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.