MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is a potent regulator of glycolysis and gluconeogenesis? |
| A. | Fructose 2, 6-bisphosphate |
| B. | Fructose 1, 6-bisphosphate |
| C. | Fructose 6-phosphate |
| D. | Glucose 1, 6-bisphosphate |
| Answer» B. Fructose 1, 6-bisphosphate | |
| 2. |
Which of the following statements is true regarding acetyl co-A? |
| A. | It stimulates pyruvate dehydrogenase |
| B. | It stimulates pyruvate carboxylase |
| C. | It inhibits pyruvate carboxylase |
| D. | It stimulates hexokinase |
| Answer» C. It inhibits pyruvate carboxylase | |
| 3. |
The second control point in gluconeogenesis is the reaction catalyzed by ___________ |
| A. | Pyruvate kinase |
| B. | Pyruvate dehydrogenase |
| C. | FBPase-1 |
| D. | PFK-1 |
| Answer» D. PFK-1 | |
| 4. |
Three reactions of glycolysis are so exergonic, which are not catalyzed by? |
| A. | Hexokinase |
| B. | PFK-1 |
| C. | Pyruvate kinase |
| D. | Pyruvate dehydrogenase |
| Answer» E. | |
| 5. |
How many steps are catalyzed by the same enzymes in both glycolysis and gluconeogenesis? |
| A. | 6 |
| B. | 7 |
| C. | 8 |
| D. | 9 |
| Answer» C. 8 | |
| 6. |
When blood sugar levels fall, glycolysis is halted in liver to allow ___________ |
| A. | Homeostasis |
| B. | Anaerobic respiration |
| C. | Aerobic respiration |
| D. | Gluconeogenesis |
| Answer» E. | |
| 7. |
WHICH_OF_THE_FOLLOWING_STATEMENTS_IS_TRUE_REGARDING_ACETYL_CO-A??$ |
| A. | It stimulates pyruvate dehydrogenase |
| B. | It stimulates pyruvate carboxylase |
| C. | It inhibits pyruvate carboxylase |
| D. | It stimulates hexokinase |
| Answer» C. It inhibits pyruvate carboxylase | |
| 8. |
Which_of_the_following_is_a_potent_regulator_of_glycolysis_and_gluconeogenesis?$ |
| A. | Fructose 2, 6-bisphosphate |
| B. | Fructose 1, 6-bisphosphate |
| C. | Fructose 6-phosphate |
| D. | Glucose 1, 6-bisphosphate |
| Answer» B. Fructose 1, 6-bisphosphate | |
| 9. |
Which of the following statements is true about PFK-1? |
| A. | It is stimulated by AMP and ADP |
| B. | It is stimulated by citrate and ATP |
| C. | It is inhibited by AMP and ADP |
| D. | It is stimulated by citrate and ADP |
| Answer» B. It is stimulated by citrate and ATP | |
| 10. |
The second control point in gluconeogenesis is the reaction catalyzed by |
| A. | Pyruvate kinase |
| B. | Pyruvate dehydrogenase |
| C. | FBPase-1 |
| D. | PFK-1 |
| Answer» D. PFK-1 | |
| 11. |
What are the effects of increased concentration of citrate? |
| A. | Increases the inhibitory effect of ATP |
| B. | Decreases the inhibitory effect of ATP |
| C. | Increases the activity of ATP |
| D. | Increases the activity of AMP |
| Answer» B. Decreases the inhibitory effect of ATP | |
| 12. |
Three reactions of glycolysis are so exergonic, which are not catalyzed by |
| A. | Hexokinase |
| B. | PFK-1 |
| C. | Pyruvate kinase |
| D. | Pyruvate dehydrogenase |
| Answer» E. | |
| 13. |
How many steps are catalyzed by different enzymes in glycolysis and gluconeogenesis? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 14. |
How many steps are catalyzed by same enzymes in both glycolysis and gluconeogenesis? |
| A. | 6 |
| B. | 7 |
| C. | 8 |
| D. | 9 |
| Answer» C. 8 | |
| 15. |
When blood sugar levels fall, glycolysis is halted in liver to allow |
| A. | Homeostasis |
| B. | Anaerobic respiration |
| C. | Aerobic respiration |
| D. | Gluconeogenesis |
| Answer» E. | |
| 16. |
Gluconeogenesis responds to which of the following? |
| A. | Hormonal control |
| B. | pH control |
| C. | Temperature control |
| D. | Blood control |
| Answer» B. pH control | |