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Course: AP BIOLOGY
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AP BIOLOGY

1. Chemistry of Life

0/22

2. Cells

0/34

3. Cellular Energetics

0/24

4. Cell Communication and Cell Cycle

0/18

5. Heredity

0/14

6. Gene Expression and Regulation

0/29

7. Natural Selection

0/33

8. Ecology

0/20

AP Biology - Plants and Human Body Systems

0/19

AP Biology - Laboratory review

0/4

AP Biology - Diagnostic exam

0/1

AP Biology - Practice Test 1

0/1

AP Biology - Practice Test 2

0/1
Quiz

3.1 Enzymes — Feedback inhibition practice

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Practise how an end product regulates an earlier enzyme in a metabolic pathway.

Review Enzymes before attempting these four feedback-inhibition questions.

  • Questions count: 4
  • Passing grade: B+
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1.
In feedback inhibition, the molecule that inhibits the first enzyme is usually
the end product of the pathway
the first substrate
ATP synthase
water
2.

Feedback inhibition is when

the substrate inhibits the enzyme
enzymes are destroyed
the pathway speeds up
the end product of a pathway inhibits an enzyme early in the pathway
3.
In feedback inhibition:
the end product inhibits an enzyme early in the pathway
the substrate inhibits the last enzyme
an enzyme is permanently destroyed
ATP activates all enzymes
4.
Which statement best describes Feedback inhibition?
Regulation in which the end product of a pathway inhibits an enzyme early in that pathway.
The reactant that binds to an enzyme's active site.
The region of an enzyme whose shape and chemistry allow it to bind a specific substrate.
The model in which the active site changes shape slightly to grip the substrate more tightly once it binds.
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Part of 3. Cellular Energetics — see every lesson and quiz in this unit.
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