MCQOPTIONS
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MCQOPTIONS
This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Molecular Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the case of thymine dimer which type of ring compound is formed? |
| A. | Cyclohexane |
| B. | Cyclobutane |
| C. | Cyclopropane |
| D. | Cycloheptane |
| Answer» C. Cyclopropane | |
| 2. |
To which base OXOG base pairs? |
| A. | A, C |
| B. | A, G |
| C. | G, C |
| D. | A, T |
| Answer» B. A, G | |
| 3. |
What is the product by mutation by oxidation of DNA? |
| A. | 2,7-dihydro-8-oxoguanine |
| B. | 1,7-dihydro-7-oxoguanine |
| C. | 7,8-dihydro-8-oxoguanine |
| D. | 7,4-dihydro-8-oxoguanine |
| Answer» D. 7,4-dihydro-8-oxoguanine | |
| 4. |
Which site of guanine is the site for mutation? |
| A. | C-4 |
| B. | C-6 |
| C. | C-1 |
| D. | C-2 |
| Answer» C. C-1 | |
| 5. |
Which base is generated by the deamination of guanine? |
| A. | Xanthine |
| B. | Cytosine |
| C. | Hypoxanthine |
| D. | Thymine |
| Answer» B. Cytosine | |
| 6. |
WHICH_SITE_OF_GUANINE_IS_THE_SITE_FOR_MUTATION??$ |
| A. | C-4 |
| B. | C-6 |
| C. | C-1 |
| D. | C-2 |
| Answer» C. C-1 | |
| 7. |
To which base OXOG base pairs?$ |
| A. | A, C |
| B. | A, G |
| C. | G, C |
| D. | A, T |
| Answer» B. A, G | |
| 8. |
What_is_the_product_by_mutation_by_oxidation_of_DNA?$ |
| A. | 2,7-dihydro-8-oxoguanine |
| B. | 1,7-dihydro-7-oxoguanine |
| C. | 7,8-dihydro-8-oxoguanine |
| D. | 7,4-dihydro-8-oxoguanine |
| Answer» D. 7,4-dihydro-8-oxoguanine | |
| 9. |
In the following compound which is one of the intercalating agents? |
| A. | Ethidium |
| B. | 5-bromouracil |
| C. | Purine |
| D. | Clastrogen |
| Answer» B. 5-bromouracil | |
| 10. |
Bleomycin is the anticancer agent. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
5-bromouracil is the analog of which base? |
| A. | Thymine |
| B. | Guanine |
| C. | Cytosine |
| D. | Uracil |
| Answer» B. Guanine | |
| 12. |
In case of thymine dimer which type of ring compound is formed? |
| A. | Cyclohexane |
| B. | Cyclobutane |
| C. | Cyclopropane |
| D. | Cycloheptane |
| Answer» C. Cyclopropane | |
| 13. |
Which laboratory mutagen is prone to mutation of DNA? |
| A. | N-methyl, N1-nitro, N-nitrosoguanidine |
| B. | N-methyl, N2-nitro, N-nitrosoguanidine |
| C. | N1-methyl, N1-nitro, N-nitrosoguanidine |
| D. | N-methyl, N-nitro, N-nitrosoguanidine |
| Answer» B. N-methyl, N2-nitro, N-nitrosoguanidine | |
| 14. |
Which base is generated by the deamination of 5-methylcytosine? |
| A. | Thymine |
| B. | Adenine |
| C. | Guanine |
| D. | Uracil |
| Answer» B. Adenine | |
| 15. |
In vertebrate DNA, which base is frequently present in place of cytosine on which methyl transferase acts? |
| A. | Hypoxanthine |
| B. | 5-methylcytosine |
| C. | Xanthine |
| D. | Adenine |
| Answer» C. Xanthine | |
| 16. |
Bases in the mRNA undergo depurination. |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
Which base is generated due to the deamination of adenine? |
| A. | Guanine |
| B. | Cytosine |
| C. | Uracil |
| D. | Hypoxanthine |
| Answer» E. | |
| 18. |
With which base uracil pairs in the opposite strand upon replication? |
| A. | Adenine |
| B. | Guanine |
| C. | Cytosine |
| D. | Thymine |
| Answer» B. Guanine | |
| 19. |
Which base undergoes spontaneous damage under physiological conditions? |
| A. | Thymine |
| B. | Cytosine |
| C. | Uracil |
| D. | Guanine |
| Answer» C. Uracil | |