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Q. No.Which histone is represented by the letter X in the given diagram?
1.
H 1
2.
H 2 A
3.
H 2 B
3.
H 3
Subtopic: DNA Packaging |
87%
From NCERT
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The "Southern" technique involves:
| 1. | the detection of DNA fragments on membranes by specific radioactive antibodies. |
| 2. | the detection of proteins on membranes using a radioactive DNA probe. |
| 3. | the detection of DNA fragments on membranes by a radioactive DNA probe. |
| 4. | the detection of proteins on membranes using specific radioactive antibodies. |
Subtopic: DNA Fingerprinting |
82%
From NCERT
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Which of the following statements is correct about the role of regulatory proteins in transcription in prokaryotes?
| 1. | They only increase the expression |
| 2. | They only decrease the expression |
| 3. | They interact with RNA polymerase but do not affect the expression |
| 4. | They can act both as activators and as repressors |
Subtopic: Gene Regulation: Lac Operon |
70%
From NCERT
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Any mistakes during DNA replication by the enzyme would result into:
| 1. | Cancer | 2. | Apoptosis |
| 3. | Cell fragmentation | 4. | Mutation |
Subtopic: DNA Replication |
91%
From NCERT
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Subtopic: Transcription |
94%
From NCERT
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Watson and Crick based their model of DNA on X-ray diffraction data produced by:
1. Hershey and Chase
2. Marie Curie and Pierre Curie
3. Franklin and Wilkins
4. Meselson and Stahl
1. Hershey and Chase
2. Marie Curie and Pierre Curie
3. Franklin and Wilkins
4. Meselson and Stahl
Subtopic: DNA Double Helix |
88%
From NCERT
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Subtopic: Genetic Code: I | Genetic Code: II |
95%
From NCERT
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DNA-dependent RNA polymerase catalyzes polymerization in:
| 1. | Only in 3’ – 5’ direction |
| 2. | Only in 5’ – 3’ direction |
| 3. | In both directions |
| 4. | In neither directions |
Subtopic: Transcription |
85%
From NCERT
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Which of the following helps in the termination of transcription?
| 1. | Sigma factor | 2. | Translocase |
| 3. | Ubiquitin | 4. | Rho factor |
Subtopic: Transcription |
94%
From NCERT
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Which of the following is true for both transcription and DNA replication?
| 1. | The principle of complementarity governs the processes |
| 2. | Only if the two strands act as a template |
| 3. | Only a segment of both strands is involved |
| 4. | Adenine base pairs with thymine |
Subtopic: DNA Replication | Transcription |
80%
From NCERT
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