MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Deoxyribonucleoside triphosphates, being need in the chain termination methods are |
| A. | dATP |
| B. | dGTP and dCTP |
| C. | dTTP |
| D. | all of these |
| Answer» E. | |
| 2. |
Number of times the two DNA strands are interwined in circular DNA and is known as |
| A. | helix frequency |
| B. | linking number |
| C. | twisting number |
| D. | none of these |
| Answer» C. twisting number | |
| 3. |
In DNA replication, one new strand is synthesized complementary to an old (parent) strand and is referred as |
| A. | mutational |
| B. | semiconservative |
| C. | discontinuous |
| D. | antiparallel |
| Answer» C. discontinuous | |
| 4. |
The size of a linear DNA fragment in a gel can be estimated by |
| A. | fluorescence in UV light |
| B. | the sedimentation coefficient |
| C. | the time it takes the gel to run |
| D. | comparison with a molecular weight standard such as Hind III digested phage lambda |
| Answer» E. | |
| 5. |
Proteins which help to open the double helix for DNA synthesis are |
| A. | DNA helicases |
| B. | single stranded binding proteins |
| C. | ligase |
| D. | DNA topoisomerase |
| Answer» B. single stranded binding proteins | |
| 6. |
The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is |
| A. | DNA polymerase |
| B. | strandase |
| C. | helicase |
| D. | none of these |
| Answer» D. none of these | |
| 7. |
An enzyme that recognizes foreign DNA, and results in a cut in that DNA is called |
| A. | transposase |
| B. | helicase |
| C. | reverse transcriptase |
| D. | restriction endonuclease |
| Answer» E. | |