MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Cell Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The posttranslational modification involving nitric oxide is called __________________ |
| A. | N-nitrosylation |
| B. | P-nitrosylation |
| C. | N-glycosylation |
| D. | S-nitrosylation |
| Answer» E. | |
| 2. |
Viagra is specific for which isoform of cGMP phosphodiesterase? |
| A. | PDE2 |
| B. | PDE4 |
| C. | PDE5 |
| D. | PDE8 |
| Answer» D. PDE8 | |
| 3. |
The development of Viagra is related to the discovery of nitric oxide as a ____________________ |
| A. | secondary messenger |
| B. | gaseous compound |
| C. | primary messenger |
| D. | cyclin inhibitor |
| Answer» B. gaseous compound | |
| 4. |
Which of the following compounds is metabolized into nitric oxide? |
| A. | Phosphoglycerine |
| B. | Nitroglycerine |
| C. | Sulforaphane |
| D. | Serotonin |
| Answer» C. Sulforaphane | |
| 5. |
The nitric oxide binds to and stimulates guanylyl cyclase. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Binding of acetylcholine to outer surface of endothelial cells, signals _____________________ |
| A. | increase in cytosolic Ca<sup>2+</sup> concentration |
| B. | decrease cytosolic Ca<sup>2+</sup> concentration |
| C. | increase in acidity |
| D. | increase in basicity |
| Answer» B. decrease cytosolic Ca<sup>2+</sup> concentration | |
| 7. |
The diffusible agent produced by binding of acetylcholine to endothelial cells is __________________ |
| A. | vimentin |
| B. | nitric oxide |
| C. | hydrogen peroxide |
| D. | hydrogen sulfide |
| Answer» C. hydrogen peroxide | |
| 8. |
Acetylcholine has the function of ________________________ |
| A. | muscle relaxation |
| B. | fertilizing agent |
| C. | promoting cell adhesion |
| D. | promoting cell division |
| Answer» B. fertilizing agent | |
| 9. |
Nitric oxide is formed from which of the amino acid? |
| A. | L-lysine |
| B. | R-lysine |
| C. | R-arginine |
| D. | L-arginine |
| Answer» E. | |
| 10. |
Nitric oxide is an intracellular messenger. |
| A. | True |
| B. | False |
| Answer» B. False | |