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Enzyme Quiz AP

Last updated about 5 years ago

12 questions

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Question 1

1.

Under which conditions is enzyme A most productive?

at 40'C and a pH of 5

at 50' C and a pH of 9

at 45' C and a pH of 5

at 45' C and a pH of 9

Question 2

2.

Which of the following is true?

Graph A represents an exergonic reaction that is non-spontaneous with a negative delta G

Graph A represents an exergonic reaction that is spontaneous with a negative delta g. 

Question 3

3.

On BOTH graphs below, please draw in the enzyme-catalyzed versions of those reactions.

Question 4

4.

Which of the following are true about an enzyme-catalyzed reaction happening at Vmax?

product formation can be increased by adding substrate

all available enzyme is actively engaged

product formation can be increased by adding enzyme

all available substrate is actively engaged in the reaction

Question 5

5.

Which of the following is(are) true for anabolic reactions. There may be more than one answer.

They do not depend on enzymes

They release energy as they degrade polymers into monomers

Question 6

6.

Which of the following is(are) true about enzyme catalyzed reactions?

The reaction rate is faster than the same reaction in the absence of the enzyme

The free energy change of the reaction is opposite from the reaction in the absence of the enzyme

Question 7

7.

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following?

denaturization of the enzyme

saturation of the enzyme activity

competitive inhibition

allosteric inhibition

Question 8

8.

The following graph is based on the reaction A + B --> C + D
Which of the following represents the difference between the free energy content of the reactants and the free energy content of the products?

a

Question 9

9.

Competitive inhibitors block the entry of substrate into the active site of an enzyme. On which of the following properties of an active site does this primarily depend?

the enzyme's ability to stretch reactants and move them toward a transition state

the enzyme forming covalent bonds with the reactants

Question 10

10.

A series of enzymes catalyze the reaction X → Y → Z → A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. The information above tells us that which of the following is true?

The presence and action of A will lower Vmax for the enzyme catalyzed metabolic reaction of X--> Y

Question 11

11.

A group of AP Biology students is testing the effect of the amount of peroxidase enzyme on oxygen production. In cells, peroxidase breaks down hydrogen peroxide into water and oxygen gas. Identify an appropriate control group for this experiment.

the amount of peroxidase enzyme should be constant, making this the control group.

the group in the highest temperature condition will serve as the control since it will slow the
most extreme effects of heat

the amount of substrate is the control group since it will be kept the same to allow for a valid
experiment

Question 12

12.

The graph below shows the accumulation of product over time. Calculate the rate of enzyme-catalyzed reaction for the (2S) line on the graph. You must show all work in order to receive credit. You may use the writing tools or the text tools.

Graph A represents an exergonic reaction, that is non-spontaneous with a positive delta G

Graph A represents an endergonic reaction, that is non-spontaneous with a positive delta G.  

Graph A represents an endergonic reaction that is spontaneous with a negative delta G

They are usually spontaneous

They consume energy to build up polymers from monomers

They usually have a positive delta G

The reaction always goes in the direction toward chemical equilibrium

A and B only

A, B and C

b

c

d

e

the enzyme becoming too saturated because of the concentration of substrate

the enzyme providing an appropriate microenvironment conducive to a reaction's occurrence

the ability of an enzyme to form a template for holding and joining molecules

The presence and action of A will result in a lower rate of reaction, but not affect Vmax,  for the enzyme catalyzed metabolic reaction of X--> Y

X is a substrate

Y is both a substrate and a product

A is a competitive inhibitor

the group with the same total volume, with water in place of catalyze enzyme.