MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
Recombinant plasmids are added to a bacterial culture that has been pretreated with _________________ ions. |
| A. | iodine |
| B. | magnesium |
| C. | calcium |
| D. | ferric |
| Answer» D. ferric | |
| 2. |
Which observation was made by Avery, Macleod, and McCarty? |
| A. | DNA is a duplex molecule |
| B. | DNA can be taken up from medium |
| C. | DNA can denature at high temperatures |
| D. | DNA is more stable than RNA |
| Answer» C. DNA can denature at high temperatures | |
| 3. |
The first recombinant DNA molecule was synthesized in the year ______________ |
| A. | 1962 |
| B. | 1972 |
| C. | 1982 |
| D. | 1992 |
| Answer» C. 1982 | |
| 4. |
Which enzyme is used to join together two different types of DNA molecules? |
| A. | ligase |
| B. | endonuclease |
| C. | exonuclease |
| D. | protease |
| Answer» B. endonuclease | |
| 5. |
EcoR1 exhibits a two-fold rotational symmetry. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Which of the following enzymes in bacteria are responsible for restricting the growth of viruses? |
| A. | restriction endonuclease |
| B. | topoisomerase |
| C. | gyrase |
| D. | protease |
| Answer» B. topoisomerase | |
| 7. |
Who developed the chemical techniques to synthesize polynucleotides? |
| A. | Barbara McClintock |
| B. | James Watson |
| C. | Fredrick Sanger |
| D. | H. Gobind Khorana |
| Answer» E. | |