MCQOPTIONS
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MCQOPTIONS
This section includes 15 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 not a downstream component? |
| A. | Ras |
| B. | MEK |
| C. | ERK |
| D. | PIP3 |
| Answer» E. | |
| 2. |
Which of the following is involved in proline rich motif binding? |
| A. | SH2 |
| B. | SH3 |
| C. | PTB |
| D. | PH |
| Answer» C. PTB | |
| 3. |
Scaffold protein in insulin signal transduction ___________ |
| A. | KSR |
| B. | IRS-1 |
| C. | MEKK1 |
| D. | AKAP |
| Answer» C. MEKK1 | |
| 4. |
PTB domains bind to ___________ |
| A. | Phosphorylated tyrosine |
| B. | Phosphoryated threonine |
| C. | Phosphorylated serine |
| D. | Phosphorylated cysteine |
| Answer» B. Phosphoryated threonine | |
| 5. |
The specificity of signaling pathways does not include ___________ |
| A. | Migration of signal proteins into membrane rafts |
| B. | Assembly of large multiprotein complexes |
| C. | Phosphorylation of target proteins at Ser, Thr/Tyr residues |
| D. | Flippase-catalyzed movement of phospholipids from the inner to the outer leaflet |
| Answer» E. | |
| 6. |
WHICH_OF_THE_FOLLOWING_IS_INVOLVED_IN_PROLINE_RICH_MOTIF_BINDING??$ |
| A. | SH2 |
| B. | SH3 |
| C. | PTB |
| D. | PH |
| Answer» C. PTB | |
| 7. |
Which_of_the_following_is_not_a_downstream_component?$ |
| A. | Ras |
| B. | MEK |
| C. | ERK |
| D. | PIP3 |
| Answer» E. | |
| 8. |
Which of the following is involved in phospho-tyrosine binding? |
| A. | SH2 |
| B. | SH3 |
| C. | PTB |
| D. | PH |
| Answer» B. SH3 | |
| 9. |
Which of the following are stimulated to become membrane associated upon binding of insulin to the insulin receptor? |
| A. | PH-domain |
| B. | PTB |
| C. | SH3 |
| D. | SH2 |
| Answer» B. PTB | |
| 10. |
Which of the following converts GTP to cGMP to start its enzymatic cascade? |
| A. | Receptor guanylyl cyclase |
| B. | Receptor adenylyl cyclase |
| C. | Calmodulin |
| D. | Protein kinase-A |
| Answer» B. Receptor adenylyl cyclase | |
| 11. |
Which of the following is involved in extrinsic cell death pathway? |
| A. | Heterotrimeric G protein complex |
| B. | TRADD |
| C. | IRS-1 |
| D. | Protein-kinase A |
| Answer» C. IRS-1 | |
| 12. |
Scaffold protein in insulin signal transduction |
| A. | KSR |
| B. | IRS-1 |
| C. | MEKK1 |
| D. | AKAP |
| Answer» C. MEKK1 | |
| 13. |
PTB domains bind to |
| A. | Phosphorylated tyrosine |
| B. | Phosphoryated threonine |
| C. | Phosphorylated serine |
| D. | Phosphorylated cysteine |
| Answer» B. Phosphoryated threonine | |
| 14. |
Which of the following directly phosphorylate tyrosines to start a kinase protein enzymatic cascade? |
| A. | Receptor tyrosine kinase |
| B. | Receptor guanylyl cyclases |
| C. | Receptor serine kinase |
| D. | Receptor threonine kinase |
| Answer» B. Receptor guanylyl cyclases | |
| 15. |
The specificity of signaling pathways does not include |
| A. | Migration of signal proteins into membrane rafts |
| B. | Assembly of large multiprotein complexes |
| C. | Phosphorylation of target proteins at Ser, Thr/Tyr residues |
| D. | Flippase-catalyzed movement of phospholipids from the inner to the outer leaflet |
| Answer» E. | |