MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How many molecules of carbon dioxide are required in the Calvin cycle to produce 3 molecules of glucose? |
| A. | 9 |
| B. | 18 |
| C. | 6 |
| D. | 15 |
| Answer» C. 6 | |
| 2. |
How many molecules of ADP are produced as a result of six Calvin cycles? |
| A. | 18 |
| B. | 24 |
| C. | 12 |
| D. | 32 |
| Answer» B. 24 | |
| 3. |
How many molecules of NADP are produced as a result of six Calvin cycles? |
| A. | 9 |
| B. | 18 |
| C. | 12 |
| D. | 24 |
| Answer» D. 24 | |
| 4. |
How many molecules of ATP are required for each Calvin cycle? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 5. |
How many molecules of NADPH are required for each Calvin cycle? |
| A. | 3 |
| B. | 1 |
| C. | 4 |
| D. | 2 |
| Answer» E. | |
| 6. |
Regeneration during the Calvin cycle requires 3 ATP molecules. True or false? |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
Which of these molecules is regenerated during the Calvin cycle? |
| A. | NADPH |
| B. | ATP |
| C. | RuBP |
| D. | CO<sub>2</sub> |
| Answer» D. CO<sub>2</sub> | |
| 8. |
How many turns of the Calvin cycle are required for the formation of 3 glucose molecules? |
| A. | 15 |
| B. | 16 |
| C. | 12 |
| D. | 18 |
| Answer» E. | |
| 9. |
Which of these statements is false about reduction in the Calvin cycle? |
| A. | It is the third step of the cycle |
| B. | It leads to the formation of glucose |
| C. | It utilizes NADPH for reduction |
| D. | It utilizes ATP for phosphorylation |
| Answer» B. It leads to the formation of glucose | |
| 10. |
How many molecules of PGA are produced on carboxylation? |
| A. | 3 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |
| 11. |
What is the product of carboxylation? |
| A. | 2-PGA |
| B. | 3-PGA |
| C. | RuBP |
| D. | Rubisco |
| Answer» C. RuBP | |
| 12. |
Which of these substances catalyse carboxylation? |
| A. | RuBP carboxylase |
| B. | Pyruvate carboxylase |
| C. | Propionyl-CoA carboxylase |
| D. | Acetyl-CoA carboxylase |
| Answer» B. Pyruvate carboxylase | |
| 13. |
Which of these undergoes carboxylation during Calvin cycle? |
| A. | NADPH |
| B. | ATP |
| C. | RuBP |
| D. | PGA |
| Answer» D. PGA | |
| 14. |
Which is the most crucial step of the Calvin cycle? |
| A. | Oxidation |
| B. | Reduction |
| C. | Carboxylation |
| D. | Regeneration |
| Answer» D. Regeneration | |
| 15. |
Which of these is not a stage of the Calvin cycle? |
| A. | Carboxylation |
| B. | Reduction |
| C. | Regeneration |
| D. | Oxidation |
| Answer» E. | |