Glycolysis – Section 1

1. Glycolytic pathway regulation involves

A. allosteric stimulation by ADP
B. allosteric inhibition by ATP
C. feedback, or product, inhibition by ATP
D. all of the above

Correct Answer: D. all of the above

2. During catabolism, only about 40% of the energy available from oxidizing glucose is used to synthesize ATP. Remaining 60%

A. is lost as heat
B. is used to reduce NADP
C. remains in the products of metabolism
D. is stored as fat.

Correct Answer: A. is lost as heat

3. Why does the glycolytic pathway continue in the direction of glucose catabolism?

A. There are essentially three irreversible reactions that act as the driving force for the pathway
B. High levels of ATP keep the pathway going in a forward direction
C. The enzymes of glycolysis only function in one direction
D. Glycolysis occurs in either direction

Correct Answer: A. There are essentially three irreversible reactions that act as the driving force for the pathway

4. The released energy obtained by oxidation of glucose is stored as

A. a concentration gradient across a membrane
B. ADP
C. ATP
D. NAD+

Correct Answer: C. ATP

5. A kinase is an enzyme that

A. removes phosphate groups of substrates
B. uses ATP to add a phosphate group to the substrate
C. uses NADH to change the oxidation state of the substrate
D. removes water from a double bond

Correct Answer: B. uses ATP to add a phosphate group to the substrate

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