Q. No.A failure in cell division after DNA replication results in:
1.
Point mutation
2.
Aneuploidy
3.
Polyploidy
4.
Apoptosis
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What is another name for thymine?
| 1. | 5 – bromouracil | 2. | 3 – bromouracil |
| 3. | 3 – methyl uracil | 4. | 5 – methyl uracil |
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In Griffith's experiment, which of the following bacterial strains was capable of causing pneumonia in mice?
| 1. | Live R |
| 2. | Bacteria strain with polysaccharide coat |
| 3. | Heat Killed S |
| 4. | Live R with capsule and Heat Killed S |
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What facilitates the opening of the helix during the elongation step of transcription?
| 1. | RNA polymerase | 2. | Helicase |
| 3. | Topoisomerase | 4. | Gyrase |
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The repressor of the lac operon is:
| 1. | Lactose itself | 2. | A steroid |
| 3. | Synthesized constitutively | 4. | A product of structural gene |
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The base pairing in a double stranded DNA is correctly described as:
| 1. | Similar | 2. | Identical |
| 3. | Complementary | 4. | Synergistic |
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Any mistakes during DNA replication by the enzyme would result into:
| 1. | Cancer | 2. | Apoptosis |
| 3. | Cell fragmentation | 4. | Mutation |
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In a transcription unit, RNA polymerase binds to:
| 1. | Ori | 2. | Promoter |
| 3. | Operator | 4. | Structural gene |
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The distance between a base pair in the DNA double helix is approximately:
| 1. | 2.0 nm | 2. | 0.34 nm |
| 3. | 20 nm | 4. | 3.4 nm |
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