MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The enzyme photolyase is used in what method of repair? |
| A. | Base excision |
| B. | Photo reactivation |
| C. | Nucleotide excision |
| D. | None of the mentioned |
| Answer» C. Nucleotide excision | |
| 2. |
Recombinational repair is often due to ____________ |
| A. | Incorporation of many incorrect nucleotides by DNA pol |
| B. | Many cystidine dimer and associated large gaps in a strand |
| C. | Many thymidine dimer formations and associated large gaps in a strand |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 3. |
A point mutation that replaces a purine with another purine, or a pyrimidine with another pyramidine ____________ |
| A. | Nonsense mutation |
| B. | Silent mutation |
| C. | Transition mutation |
| D. | Transversion |
| Answer» D. Transversion | |
| 4. |
An alteration in a nucleotide sequence that changes a triplet coding for an amino acid into a termination codon is ____________ |
| A. | Nonsense mutation |
| B. | Mutagenesis |
| C. | Mutation |
| D. | Mutagen |
| Answer» B. Mutagenesis | |
| 5. |
The DNA polymerase involved in base excision repair is ____________ |
| A. | DNA polymerase |
| B. | DNA polymerase |
| C. | DNA polymerase |
| D. | DNA polymerase |
| Answer» C. DNA polymerase | |
| 6. |
What is the function of enzyme involved in base excision repair? |
| A. | Addition of correct base |
| B. | Addition of correct nucleotide |
| C. | Removal of incorrect base |
| D. | Removal of phosphodiester bond |
| Answer» D. Removal of phosphodiester bond | |
| 7. |
If the mutation has a negligible effect on the function of a gene, it is known as a ____________ |
| A. | Silent mutation |
| B. | Frame shift mutation |
| C. | Substitution mutation |
| D. | Insertion mutation |
| Answer» B. Frame shift mutation | |