MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
G-protein coupled receptors contain ________ transmembrane alpha helices. |
| A. | 2 |
| B. | 5 |
| C. | 7 |
| D. | 9 |
| Answer» D. 9 | |
| 2. |
Which messenger molecules are derived from arachidonic acid? |
| A. | eicosanoids |
| B. | terpenoids |
| C. | corticoids |
| D. | steroids |
| Answer» B. terpenoids | |
| 3. |
Steroids are derived from ________________ |
| A. | estrogen |
| B. | cholesterol |
| C. | proteins |
| D. | carbohydrates |
| Answer» C. proteins | |
| 4. |
The process by which extracellular messages translate into intracellular changes is termed _________________ |
| A. | cell signaling |
| B. | cell adhesion |
| C. | signal transduction |
| D. | cell transformation |
| Answer» D. cell transformation | |
| 5. |
To which of the following residues of the protein, the protein kinases do not add phosphate groups? |
| A. | serine |
| B. | cytosine |
| C. | threonine |
| D. | tyrosine |
| Answer» C. threonine | |
| 6. |
Protein kinases and phosphatases act by altering ______________ of the signaling proteins. |
| A. | basicity |
| B. | conformation |
| C. | acidity |
| D. | size |
| Answer» C. acidity | |
| 7. |
The primary messenger molecules bind to the transmembrane receptors. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Endocrine messengers are also called ___________________ |
| A. | hormones |
| B. | receptors |
| C. | antibody |
| D. | antigen |
| Answer» B. receptors | |
| 9. |
Paracrine messenger molecules are usually ________________ |
| A. | large |
| B. | stable |
| C. | unstable |
| D. | amphoteric |
| Answer» D. amphoteric | |
| 10. |
Cell signaling is a process by which cells communicate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
In which type of signaling, the cell that expresses messenger molecules also produces receptors? |
| A. | autocrine |
| B. | heterocrine |
| C. | paracrine |
| D. | endocrine |
| Answer» B. heterocrine | |
| 12. |
How many types of cell signaling are there? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |