Multiple Choice
________ is when the product of a biochemical pathway activates the production of itself.
a) Negative feedback inhibition.
b) Positive feedback.
c) Substrate feedback inhibition.
d) Product feedback inhibition.
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12. Microbial Metabolism
Negative & Positive Feedback
Multiple Choice
Which of the following is TRUE about feedback inhibition?
a) Feedback inhibition has no physiological importance.
b) Multiple products are required for feedback inhibition.
c) Feedback inhibition of a pathway can only be accomplished by the products of that pathway.
d) Feedback inhibition involves products binding to the active site to prevent enzyme activity.
A
Feedback inhibition has no physiological importance.
B
Multiple products are required for feedback inhibition.
C
Feedback inhibition of a pathway can only be accomplished by the products of that pathway.
D
Feedback inhibition involves products binding to the active site to prevent enzyme activity.
Verified step by step guidance1
Understand the concept of feedback inhibition: Feedback inhibition is a regulatory mechanism where the end product of a metabolic pathway inhibits an enzyme involved in its synthesis, thus controlling the pathway's activity.
Evaluate option a: Feedback inhibition is crucial for maintaining homeostasis and regulating metabolic pathways, so the statement that it has no physiological importance is false.
Evaluate option b: Feedback inhibition typically involves a single end product inhibiting the pathway, not multiple products, making this statement false.
Evaluate option c: This statement is true because feedback inhibition is usually accomplished by the end product of the pathway inhibiting an enzyme earlier in the pathway.
Evaluate option d: Feedback inhibition generally involves the end product binding to an allosteric site, not the active site, to inhibit enzyme activity, making this statement false.
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