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. |
Plasma membrane protein predicted to have seen 7 transmembrane helices segment binds __________ |
| A. | Progesterone |
| B. | Thyroid stimulating hormone |
| C. | Insulin |
| D. | Follicle stimulating hormone |
| Answer» B. Thyroid stimulating hormone | |
| 2. |
Which drug is used to terminate early pregnancies? |
| A. | RU486 |
| B. | Metformin |
| C. | Glucophage |
| D. | Victoza |
| Answer» B. Metformin | |
| 3. |
What is the drug antagonist of estrogen? |
| A. | Tanoxifen |
| B. | Metformin |
| C. | Glucophage |
| D. | Victoza |
| Answer» B. Metformin | |
| 4. |
Mode of action of steroid hormones involve ______________ |
| A. | Stimulation of DNA replication |
| B. | Stimulation of m-RNA transcription |
| C. | Inhibition of protein synthesis |
| D. | Secondary messenger |
| Answer» C. Inhibition of protein synthesis | |
| 5. |
Steroid hormones receptor binds to _____________ |
| A. | Hormone response elements in m-RNA |
| B. | Hormone response elements in DNA |
| C. | Hormone response elements in proteins |
| D. | Ribosomes to stimulate translation |
| Answer» C. Hormone response elements in proteins | |
| 6. |
Steroid regulatory proteins mediate the act by binding at ___________ |
| A. | Zinc finger motif |
| B. | Leucine zipper motif |
| C. | Helix turn helix motif |
| D. | Histone helix motif |
| Answer» B. Leucine zipper motif | |
| 7. |
Which is an example of negative regulator? |
| A. | CAP |
| B. | Lac 1 gene |
| C. | Nuclear receptors |
| D. | Phosphorylated STAT proteins |
| Answer» C. Nuclear receptors | |
| 8. |
Which is an example of a positive regulator? |
| A. | CAP |
| B. | Lac 1 gene |
| C. | Trp operon |
| D. | Met operon |
| Answer» B. Lac 1 gene | |
| 9. |
THE_DRUG_USED_TO_TERMINATE_EARLY_PREGNANCIES_IS?$ |
| A. | RU486 |
| B. | Metformin |
| C. | Glucophage |
| D. | Victoza |
| Answer» B. Metformin | |
| 10. |
Plasma membrane protein predicted to have seen 7 transmembrane helices segment binds |
| A. | Progesterone |
| B. | Thyroid stimulating hormone |
| C. | Insulin |
| D. | Follicle stimulating hormone |
| Answer» B. Thyroid stimulating hormone | |
| 11. |
The drug antagonist of estrogen i? |
| A. | Tanoxifen |
| B. | Metformin |
| C. | Glucophage |
| D. | Victoza |
| Answer» B. Metformin | |
| 12. |
Mode of action of steroid hormones involve |
| A. | Stimulation of DNA replication |
| B. | Stimulation of m-RNA transcription |
| C. | Inhibition of protein synthesis |
| D. | Secondary messenger |
| Answer» C. Inhibition of protein synthesis | |
| 13. |
Steroid hormones receptor binds to |
| A. | Hormone response elements in m-RNA |
| B. | Hormone response elements in DNA |
| C. | Hormone response elements in proteins |
| D. | Ribosomes to stimulate translation |
| Answer» C. Hormone response elements in proteins | |
| 14. |
Which out of the following statements is true about gene regulation in bacteria? |
| A. | Repressor protein blocks transcription by binding to operator sequence |
| B. | Activator proteins bind near promoters and increase the efficiency of transcription |
| C. | Enhancers commonly regulate transcription |
| D. | Genes with related functions are often grouped together and have a single start codon |
| Answer» B. Activator proteins bind near promoters and increase the efficiency of transcription | |
| 15. |
Steroid regulatory proteins mediate the act by binding at |
| A. | Zinc finger motif |
| B. | Leucine zipper motif |
| C. | Helix turn helix motif |
| D. | Histone helix motif |
| Answer» B. Leucine zipper motif | |
| 16. |
An example of positive regulator |
| A. | CAP |
| B. | Lac 1 gene |
| C. | Trp operon |
| D. | Met operon |
| Answer» B. Lac 1 gene | |
| 17. |
How do steroid hormones produce their effects in cells? |
| A. | By activating key enzymes in metabolic pathway |
| B. | By binding to intracellular receptors and promoting transcription of specific genes |
| C. | By promoting degradation of specific m-RNAs |
| D. | By activating translation of certain m-RNAs |
| Answer» C. By promoting degradation of specific m-RNAs | |