MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
How many types of skin cancers can develop by overexposure to ultraviolet rays? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 2. |
Xeroderma pigmentosum is caused by ______________________ |
| A. | UV radiations |
| B. | X-rays |
| C. | Gamma radiations |
| D. | Beta-rays |
| Answer» B. X-rays | |
| 3. |
The NHEJ pathway is used to rectify __________________ in the DNA. |
| A. | nucleotide substitutions |
| B. | double-strand breaks |
| C. | single-strand breaks |
| D. | mismatched basepairs |
| Answer» C. single-strand breaks | |
| 4. |
Which of the following does not introduce double-strand breaks in the DNA? |
| A. | Gamma rays |
| B. | Cancer drugs |
| C. | Free radicals |
| D. | Inherited mutations |
| Answer» E. | |
| 5. |
A mismatched base pair can cause ________________ in the double helix. |
| A. | change in geometry |
| B. | change in location |
| C. | change in size |
| D. | change in alkalinity |
| Answer» B. change in location | |
| 6. |
Which repair system operates to repair DNA strands that are actively transcribed? |
| A. | Double-strand breakage repair |
| B. | Nucleotide excision repair |
| C. | RNA repair |
| D. | Messenger RNA repair |
| Answer» C. RNA repair | |
| 7. |
Which repair system operates to remove the altered bases generated by reactive chemicals present in the diet? |
| A. | Base excision repair |
| B. | Nucleotide excision repair |
| C. | Mismatch repair |
| D. | Double-stranded breakage repair |
| Answer» B. Nucleotide excision repair | |
| 8. |
How many pathways of nucleotide excision repair exist? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 9. |
Mutations in the DNA may be passed to the next generation. |
| A. | True |
| B. | False |
| Answer» B. False | |