Q. No.The protein synthesizing machinery of a cell has evolved around:
1.
DNA
2.
RNA
3.
Protein itself
4.
Viroids
Viruses grown on radioactive sulfur contain:
| 1. | Radioactive proteins but not DNA |
| 2. | Radioactive DNA but not proteins |
| 3. | Radioactive proteins and DNA |
| 4. | Nonradioactive DNA and protein |
In a strand of nucleic acid, two nucleotides are linked together by:
1. 3’ – 5’ phosphodiester bond
2. 5’ – 3’ phosphodiester bond
3. 2’ – 5’ phosphodiester bond
4. 3’ – 1’ phosphodiester bond
The daughter DNA that was extracted from the culture one generation after the transfer from 15N to 14N medium had:
| 1. | Low density |
| 2. | Intermediate density |
| 3. | High density |
| 4. | One had low and another had high density |
A failure in cell division after DNA replication results in:
| 1. | Point mutation | 2. | Aneuploidy |
| 3. | Polyploidy | 4. | Apoptosis |
What is another name for thymine?
| 1. | 5 – bromouracil | 2. | 3 – bromouracil |
| 3. | 3 – methyl uracil | 4. | 5 – methyl uracil |
Griffith’s transformation experiment in Streptococcus pneumoniae demonstrated that:
1. Heat-killed virulent bacteria failed to produce disease in mice
2. Live non-virulent bacteria failed to produce disease in mice
3. Heat-killed virulent bacteria transformed non-virulent bacteria into virulent form
4. Live virulent bacteria alone produced fatal infection in mice
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 124589
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 124589
What facilitates the opening of the helix during the elongation step of transcription?
| 1. | RNA polymerase | 2. | Helicase |
| 3. | Topoisomerase | 4. | Gyrase |
The repressor of the lac operon is:
| 1. | Lactose itself | 2. | A steroid |
| 3. | Synthesized constitutively | 4. | A product of structural gene |
The base pairing in a double stranded DNA is correctly described as:
| 1. | Similar | 2. | Identical |
| 3. | Complementary | 4. | Synergistic |
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