Homework answers / question archive / The University of Oklahoma, Norman CHEM 3653 Quiz-18: 1)The TCA cycle metabolite that inhibits PFK1 in glycolysis is ……………

The University of Oklahoma, Norman CHEM 3653 Quiz-18: 1)The TCA cycle metabolite that inhibits PFK1 in glycolysis is ……………

Chemistry

Share With

---

 

1. 1. phosphorylation to fructose-6-phosphate by fructokinase.
   2. phosphorylation to fructose-1-phosphate by fructokinase.

c. phosphorylation to fructose-6-phosphate by hexokinase.

d. phosphorylation to fructose-1-phosphate by galactokinase.

e. Fructose is isomerized to glucose, which enters the pathway.

 

5. In two turns of the citrate cycle, how many electrons are transferred from the citrate cycle intermediates to NAD+ and FAD?
   1. 4
   2. 8
   3. 12

d. 16

 

 

6. Which enzyme(s. in the citrate cycle catalyze(s. the oxidative decarboxylation reaction(s)? (Choose all the correct answers)
   1. pyruvate dehydrogenase
   2. citrate synthase

c. isocitrate dehydrogenase

d. alpha-ketoglutarate dehydrogenase

e. No correct answer.

 

7. How many cytosolic NADH are produced during glycolysis, pyruvate dehydrogenase and TCA cycle?
   1. 0
   2. 1

c. 2

4. 3
5. 4
6. 6

 

8. Which one of the following proteins is not an integral membrane protein?
   1. NADH-Q oxidoreductase
   2. Q-Cytochrome oxidoreductase
   3. Succinate dehydrogenase

d. Cytochrome C

e. Cytochrome C oxidase