MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
Which of the following statements is correct according to Chargaff s rules? |
| A. | All DNA molecules contain the same proportions of A, C, G and T |
| B. | Single-stranded RNA molecules contain the same amount of A and U |
| C. | In double-stranded DNA, the amount of T equals the amount of C |
| D. | In double-stranded DNA, the amount of G equals the amount of C |
| Answer» E. | |
| 2. |
What is the approximate fraction of genetic variation in the nuclear genome that is expected to have a harmful effect on gene function? |
| A. | 50% |
| B. | 25% |
| C. | 10% |
| D. | 1% |
| Answer» E. | |
| 3. |
Which of the following is the start codon in protein translation? |
| A. | AUG |
| B. | UAA |
| C. | UAG |
| D. | UGA |
| Answer» B. UAA | |
| 4. |
Which of the following is a consensus sequence? |
| A. | Promoter sequence |
| B. | Enhancer sequence |
| C. | Terminator sequence |
| D. | All of the mentioned |
| Answer» E. | |
| 5. |
During translation of proteins, the aminoacyl tRNA arrives at ____________ |
| A. | Ribosomal A site |
| B. | Ribosomal P site |
| C. | Ribosomal T site |
| D. | Ribosomal S site |
| Answer» B. Ribosomal P site | |
| 6. |
Application of non-ionizing ultraviolet radiation causes _________ |
| A. | formation of pyrimidine dimers |
| B. | deletion of pyrimidine bases |
| C. | formation of methyl guanine |
| D. | formation of methyl thymine |
| Answer» B. deletion of pyrimidine bases | |
| 7. |
Hybrid vigour results from ____________ |
| A. | dominance |
| B. | co-dominance |
| C. | over dominance |
| D. | incomplete dominance |
| Answer» D. incomplete dominance | |
| 8. |
Hybrid vigour is referred to __________ |
| A. | superior phenotype of a hybrid |
| B. | increased fertility of a hybrid |
| C. | increased mortality of a hybrid |
| D. | decreased function of a hybrid |
| Answer» B. increased fertility of a hybrid | |
| 9. |
An example of extensively polyploid organism is _________ |
| A. | Xenopus laevis |
| B. | Homo sapiens |
| C. | Drosophila melanogaster |
| D. | Equus caballus |
| Answer» B. Homo sapiens | |
| 10. |
The nucleosome is composed of how many histone proteins? |
| A. | 7 |
| B. | 9 |
| C. | 8 |
| D. | 10 |
| Answer» C. 8 | |
| 11. |
In FISH technology, which fluorescence confirms a BCR/ABL translocation? |
| A. | Red signal |
| B. | Green signal |
| C. | Yellow signal |
| D. | Orange signal |
| Answer» D. Orange signal | |