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Feedback Inhibition of Biochemical Pathways

View the animation below, then complete the quiz to test your knowledge of the concept.

1In feedback inhibition, the inhibitor of the biochemical pathway is typically
A)the substrate of the enzyme inhibited.
B)the product of the enzyme inhibited.
C)a substance that is produced towards the middle of the biochemical pathway.
D)the final product of the biochemical pathway.
E)a product of another biochemical pathway.

2What does the inhibitor bind to during feedback inhibition?
A)active site of the enzyme being inhibited
B)allosteric site of the enzyme being inhibited
C)both A and B
D)neither A nor B
E)either A or B, depending on the biochemical pathway

3Consider the biochemical pathway used to synthesize the amino acid proline. A high increase in the level of proline will most likely lead to
A)a decrease in proline production.
B)a further increase in proline production.
C)no change in the rate of proline production.
D)increased breakdown of proline.
E)proline being converted to praline.

4If the end product of a biochemical pathway becomes available in the environment, it is crucial for the cell to continue making the product.

5A biochemical pathway consists of a specific sequence of enzyme-catalyzed reactions.

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