Choose the one most appropriate answer for each.
-active site
A)amount of energy to start a reaction
B)coenzyme that carries electrons
C)attachment of a phosphate group by a high-energy bond
D)an excess of end-product molecules alters the shape of the first enzyme in the pathway and shuts off that metabolic pathway
E)part of an enzyme that binds to the substrate
F)by binding a regulatory molecule, it changes the activity of a metabolic pathway
G)affects rates of chemical reactions by reducing activation energy
H)important energy currency in metabolism
I)enzyme that participates in the neutralization of hydrogen peroxide
J)a measure of the degree of energy change after a concentrated form of energy has been dispersed

Question

Quizplus · Accepted Answer

The active site of an enzyme is the part of the enzyme that specifically binds to the substrate and allows for the chemical reaction to occur.

Answer: G
 The active site of an enzyme lowers the activation energy required for a chemical reaction, allowing it to occur more quickly.

Answer: F
 Some enzymes have regulatory sites on them where specific molecules can bind and alter the enzyme's activity in a metabolic pathway.

Answer: I
 Catalase is an enzyme that participates in the neutralization of hydrogen peroxide, a toxic byproduct of cellular respiration.

Answer: H
 Adenosine triphosphate (ATP) is an important energy currency in metabolism, providing the energy necessary for cellular reactions.

Choose the One Most Appropriate Answer for Each