MCQOPTIONS
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MCQOPTIONS
This section includes 17 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 the most influential in setting the flux through glycolysis? |
| A. | Hexokinase |
| B. | PFK-1 |
| C. | PFK-2 |
| D. | Both hexokinase and PFK-1 |
| Answer» B. PFK-1 | |
| 2. |
Metabolic control analysis does not suggest that ___________ |
| A. | When the blood glucose level rises, insulin acts in muscle to increase glucose transport into cells by bringing GLUT4 to the plasma membrane |
| B. | When the blood glucose level rises, insulin acts in muscle to induce the synthesis of PFK-1 |
| C. | When the blood glucose level rises, insulin acts in muscle to activate glycogen synthase by covalent alteration |
| D. | When the blood glucose level rises, insulin acts in muscle to induce the synthesis of hexokinase |
| Answer» C. When the blood glucose level rises, insulin acts in muscle to activate glycogen synthase by covalent alteration | |
| 3. |
Some regulated enzymes rebalance the level of metabolites in response to the change in flux, this activity is ___________ |
| A. | Regulation |
| B. | Control |
| C. | Metabolism |
| D. | Anabolism |
| Answer» B. Control | |
| 4. |
Some regulated enzymes control the flux through a pathway, this activity is ___________ |
| A. | Regulation |
| B. | Control |
| C. | Metabolism |
| D. | Anabolism |
| Answer» C. Metabolism | |
| 5. |
An expression for the experimentally determined change in flux through a pathway in response to a regulatory hormone or second messenger. |
| A. | Response coefficient |
| B. | Elasticity coefficient |
| C. | Flux control coefficient |
| D. | Metabolic control |
| Answer» B. Elasticity coefficient | |
| 6. |
Which of the following is a measure of the effect of an enzyme’s concentration on flux through a multi-enzyme pathway? |
| A. | Response coefficient |
| B. | Elasticity coefficient |
| C. | Flux control coefficient |
| D. | Metabolic control |
| Answer» D. Metabolic control | |
| 7. |
Flux control coefficient measures the ____________ |
| A. | Steady state change |
| B. | pH change |
| C. | Temperature change |
| D. | Hormonal change |
| Answer» B. pH change | |
| 8. |
METABOLIC_CONTROL_ANALYSIS_DOES_NOT_SUGGESTS_THAT?$ |
| A. | When the blood glucose level rises, insulin acts in muscle to increase glucose transport into cells by bringing GLUT4 to the plasma membrane |
| B. | When the blood glucose level rises, insulin acts in muscle to induce the synthesis of PFK-1 |
| C. | When the blood glucose level rises, insulin acts in muscle to activate glycogen synthase by covalent alteration |
| D. | When the blood glucose level rises, insulin acts in muscle to induce the synthesis of hexokinase |
| Answer» C. When the blood glucose level rises, insulin acts in muscle to activate glycogen synthase by covalent alteration | |
| 9. |
Which of the following is the most influential in setting the flux through glycolysis? |
| A. | Hexokinase |
| B. | PFK-1 |
| C. | PFK-2 |
| D. | Both hexokinase and PFK-1 |
| Answer» B. PFK-1 | |
| 10. |
Some regulated enzymes rebalance the level of metabolites in response to the change in flux, this activity i? |
| A. | Regulation |
| B. | Control |
| C. | Metabolism |
| D. | Anabolism |
| Answer» B. Control | |
| 11. |
Some regulated enzymes control the flux through a pathway, this activity is |
| A. | Regulation |
| B. | Control |
| C. | Metabolism |
| D. | Anabolism |
| Answer» C. Metabolism | |
| 12. |
Which of the following statements about the control of glycogen synthesis from blood glucose in myocytes is incorrect? |
| A. | Insulin affects three of five steps in this pathway |
| B. | The effects on transport and hexokinase activity increase the flux towards glycogen |
| C. | The change in glycogen synthase activity increases the flux towards glycogen |
| D. | Hexokinase enzyme is involved |
| Answer» D. Hexokinase enzyme is involved | |
| 13. |
An expression for the experimentally determined change in flux through a pathway in response to a regulatory hormone or second messenger |
| A. | Response coefficient |
| B. | Elasticity coefficient |
| C. | Flux control coefficient |
| D. | Metabolic control |
| Answer» B. Elasticity coefficient | |
| 14. |
Which of the following is a measure of how responsive the enzyme is to changes in the concentration of a metabolite? |
| A. | Response coefficient |
| B. | Elasticity coefficient |
| C. | Flux control coefficient |
| D. | Metabolic control |
| Answer» C. Flux control coefficient | |
| 15. |
Which of the following is a measure of the effect of an enzyme’s concentration on flux through a multi-enzyme pathway?$ |
| A. | Response coefficient |
| B. | Elasticity coefficient |
| C. | Flux control coefficient |
| D. | Metabolic control |
| Answer» D. Metabolic control | |
| 16. |
What is the relation between elasticity coefficient, flux coefficient and response coefficient? |
| A. | R = C.ε |
| B. | R = <sup>C</sup>⁄<sub>ε</sub> |
| C. | R = <sup>ε</sup>⁄<sub>C</sub> |
| D. | ε = C.R |
| Answer» B. R = <sup>C</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>‚âà√≠¬¨¬µ</sub> | |
| 17. |
Flux control coefficient measures the |
| A. | Steady state change |
| B. | pH change |
| C. | Temperature change |
| D. | Hormonal change |
| Answer» B. pH change | |