1. Which of the following is not involved in the citric acid cycle? Select one:

Question

1. Which of the following is not involved in the citric acid cycle? Select one:

a. oxaloacetate b. citrulline c. alpha keto glutarate d. succinyl-CoA e. CoASH

2. All the decarboxylation steps of the citric acid cycle:

Select one:

a. Involve FAD

b. Require NAD+

c. Take place after the substrate is reduced to four carbons

d. Require molecular oxygen

e. All of the above

3. The conversion of 1 mole of acetyl CoA to 2 moles of CO2 via the citric acid cycle also yields _____ moles of NADH, _____ moles of FADH2, and _____ moles of ATP (or GTP).

Select one:

a. 3; 2; 0

b. 3; 1; 1

c. 4; 1; 1

d. 4; 2; 1

e. 3; 2; 2

4. The reaction in the citric acid cycle that provides substrate-level phosphorylation:

Select one:

a. requires succinyl CoA

b. adds OH to the carbon skeleton of the substrate

c. requires ADP or GDP

d. requires succinyl-CoA synthetase.

e. all of the above

5. How many ATP are obtained by substrate-level phosphorylation during a complete oxidation of a single glucose molecule (net yield, include Glycolysis, PDH reaction and the Krebs' cycle)?

Select one:

a. 1

b. 2

c. 4

d. 6

e. 32

6. In eukaryotic cells, glycolysis extracts _______ energy from glucose as compared with the Krebs cycle

Select one:

a. more

b. less

c. the same amount of

7. Which is FALSE: During the oxidation of pyruvate through the PDH reaction and the Krebs Cycle-

Select one:

a. three oxygen atoms and nine hydrogen atoms are added to the substrates in various steps

b. the number of hydrogen pairs transferred to electron carriers equals the number of hydrogen atoms that are present in pyruvate

c. the number of oxygen atoms released as CO2 exceeds the number of oxygen atoms present in pyruvate

d. the number of carbon atoms released as CO2 equals the number of carbon atoms present in pyruvate

e. all the answers are correct

8.The _______________ of alpha keto glutarate to succinyl-CoA is catalyzed by ____________

Select one:

a. dehydration; pyruvate dehydration complex

b. oxidative decarboxylations; pyruvate dehydrogenase complex

c. decarboxylations; alpha keto glutarate dehydrogenase complex

d. transacylation; pyruvate transacylase

e. none of the above.

Explanation / Answer

1) Citruline is not involved in the citric acid cycle.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.