Mechanism of Enzyme Action

Q.

What is the enzyme action?

Q. The rate of a chemical or physical reaction refers to the amount of product formed per unit time.

1. False
2. True

Q. According to the induced fit hypothesis, which of the active site of enzymes brings about the catalytic changes of the substrate?

1. Buttressing group
2. Catalytic group
3. Allosteric group
4. Either buttressing or catalytic group

Q. Enzymes get consumed during a chemical reaction

1. False
2. True

Q. Which of the following representation shows the correct steps in catalytic reaction of an enzyme?

1. E + S $\to$ E + P
2. E + S $\to$ ES $\to$ E + P
3. E + S $\to$ EP $\to$ E + P
4. E + S $\to$ ES $\to$ EP $\to$ E + P

Q.
I. Segment representing the energy of activation
II. Segment representing the amount of free energy released by the reaction
III. Transition state

Which one is correct?

1. 1-II, 2-I, 3-III
2. 1-I, 2-II, 3-III
3. 1-III, 2-II, 3-I
4. 1-I, 2-III, 3-II

Q. Each enzyme can catalyse only a specific chemical reaction

1. True
2. False

Q.

In a feedback mechanism, the activity of an enzyme is inhibited by _____.

1. enzyme
2. external factors
3. substrate

4. end product