MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 14 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. |
In higher salt concentration the DNA helix assumes the right-handed conformation. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
What is the factor responsible for the left-handed helical conformation in Z form of DNA? |
| A. | Syn conformation at pyrimidine |
| B. | Anti conformation at pyrimidine |
| C. | Syn conformation at purine |
| D. | Anti conformation at purine |
| Answer» D. Anti conformation at purine | |
| 3. |
In the Z form of DNA the fundamental repeating unit is __________ |
| A. | Purine – pyrimidine nucleotide |
| B. | Purine – pyrimidine dinucleotide |
| C. | Purine – pyrimidine tri-nucleotide |
| D. | Purine – pyrimidine tetra-nucleotide |
| Answer» E. | |
| 4. |
In a right handed DNA the glycosidic bond is in syn configuration. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
How many bases are there in per turn of the A form of DNA? |
| A. | 11 bp |
| B. | 10 bp |
| C. | 12 bp |
| D. | 8 bp |
| Answer» B. 10 bp | |
| 6. |
WHAT_IS_THE_FACTOR_RESPONSIBLE_FOR_THE_LEFT_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬®_HANDED_HELICAL_CONFORMATION_IN_Z_FORM_OF_DNA??$# |
| A. | Syn conformation at pyrimidine |
| B. | Anti conformation at pyrimidine |
| C. | Syn conformation at purine |
| D. | Anti conformation at purine |
| Answer» D. Anti conformation at purine | |
| 7. |
In_higher_salt_concentration_the_DNA_helix_assumes_the_right_–_handed_conformation________$# |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
In the Z form of DNA the fundamental repeating unit is _________? |
| A. | Purine – pyrimidine nucleotide |
| B. | Purine – pyrimidine dinucleotide |
| C. | Purine – pyrimidine tri-nucleotide |
| D. | Purine – pyrimidine tetra-nucleotide |
| Answer» E. | |
| 9. |
In a right handed DNA the glycosidic bond is in syn configuration ____________ |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Which of the following is not a character of B form of DNA? |
| A. | Longer and thinner |
| B. | Right – handed helix |
| C. | Narrow minor groove |
| D. | Flat major groove |
| Answer» E. | |
| 11. |
Which of the following is not a character of A DNA? |
| A. | Short and broad |
| B. | Left handed helix |
| C. | Narrow minor groove |
| D. | Broad and shallow major groove |
| Answer» C. Narrow minor groove | |
| 12. |
How many bases are there in per turn of the B form of DNA? |
| A. | 8 bp |
| B. | 9 bp |
| C. | 10 bp |
| D. | 11 bp |
| Answer» D. 11 bp | |
| 13. |
What is the condition required to observe A form of DNA? |
| A. | Low humidity |
| B. | High humidity |
| C. | Low temperature |
| D. | High temperature |
| Answer» B. High humidity | |
| 14. |
What is the condition required to observe B form of DNA? |
| A. | Low humidity |
| B. | High humidity |
| C. | Low temperature |
| D. | High temperature |
| Answer» C. Low temperature | |