MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
With respect to topoisomerases which of the following is true? |
| A. | Only of one type |
| B. | Never changes linking number |
| C. | Requires ATP |
| D. | Introduces knots |
| Answer» D. Introduces knots | |
| 2. |
Which of the following is known to relax supercoiled DNA? |
| A. | Nuclease |
| B. | DNase I |
| C. | Endonuclease |
| D. | Topoisomerase |
| Answer» E. | |
| 3. |
The nucleosome is seen to have negative supercoils. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Which of the following organism has been found to have a positively supercoiled DNA? |
| A. | Saurida tumbil |
| B. | Monarda didyma |
| C. | Thermus aquaticus |
| D. | Cyanobacteria |
| Answer» D. Cyanobacteria | |
| 5. |
What is Lk and Lk0 dependent upon? |
| A. | Histone concentration |
| B. | G : A ratio |
| C. | Composition of DNA |
| D. | Length of DNA |
| Answer» E. | |
| 6. |
If Lk < Lk0 then DNA is ____________ |
| A. | Relaxed |
| B. | Negatively coiled |
| C. | Positively coiled |
| D. | Lk > 0 |
| Answer» C. Positively coiled | |
| 7. |
How is the extent of supercoiling measured? |
| A. | Lk + Lk<sup>0</sup> |
| B. | Lk<sup>0</sup> Lk |
| C. | Lk Lk<sup>0</sup> |
| D. | Lk + Lk<sub>1</sub> |
| Answer» D. Lk + Lk<sub>1</sub> | |