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Enzyme C1.11-17 HL only

Authored by Rita Na

Biology

12th Grade

Enzyme C1.11-17 HL only
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41 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of an intracellular enzyme-catalyzed reaction?

The breakdown of food in the stomach

The reaction of oxygen and glucose in the lungs

The breakdown of glucose in glycolysis

The synthesis of protein in the ribosomes

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If metabolic reactions were 100% efficient in energy transfer, what would be the most likely consequence?

There would be no need for mammals and birds to eat

Heat generation by metabolic reactions would increase

Heat generation by metabolic reactions would be eliminated

All metabolic reactions would occur at the same rate

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes the difference between cyclical and linear pathways in metabolism?

Cyclical pathways, like the Krebs cycle, are a series of reactions where the final product is the initial reactant, while linear pathways, like glycolysis, are a series of reactions that proceed in a stepwise manner

Cyclical pathways, like glycolysis, are a series of reactions that proceed in a stepwise manner, while linear pathways, like the Krebs cycle, are a series of reactions where the final product is the initial reactant

Cyclical pathways, like glycolysis, involve reactions that repeat in a cycle, while linear pathways, like the Krebs cycle, involve reactions that proceed in a stepwise manner

Cyclical pathways, like the Krebs cycle, involve reactions that occur in the mitochondria, while linear pathways, like glycolysis, occur in the cytoplasm

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What distinguishes non-competitive inhibition from competitive inhibition?

In non-competitive inhibition, the inhibitor binds to the enzyme's active site, while in competitive inhibition, the inhibitor binds to an allosteric site

In non-competitive inhibition, the inhibitor binds to an allosteric site on the enzyme, causing a change in the enzyme's shape that prevents substrate binding, while in competitive inhibition, the inhibitor and substrate compete for the enzyme's active site

In non-competitive inhibition, the inhibitor permanently binds to the enzyme's active site, while in competitive inhibition, the inhibitor's binding is reversible

In non-competitive inhibition, the inhibitor binds to the substrate, while in competitive inhibition, the inhibitor binds to the enzyme's active site

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of isoleucine in the regulation of metabolic pathways?

Isoleucine is a product of a metabolic pathway that can act as a competitive inhibitor, binding to the enzyme's active site and preventing substrate binding

Isoleucine is a product of a metabolic pathway that can act as an allosteric activator, binding to the enzyme and encouraging substrate binding

Isoleucine is a product of a metabolic pathway that can act as a non-competitive inhibitor, binding to an allosteric site on the enzyme and preventing substrate binding

Isoleucine is a product of a metabolic pathway that can act as a feedback inhibitor, binding to the enzyme and decreasing the pathway's activity when isoleucine levels are high

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which of the following reactions release free energy?

Exergonic reactions

Endergonic reactions

Both of the above

None of the above

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the consequence of metabolic reactions not being 100% efficient?

There is no consequence

They generate heat

They do not generate heat

They are 100% efficient

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