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Q. No.
Assertion (A):
Only one of the two DNA strands serves as a template for transcription.
Reason (R):
The other strand is called the coding strand.
1.
Both (A) and (R) are True and (R) correctly explains (A)
2.
Both (A) and (R) are True but (R) does not correctly explain (A)
3.
(A) is True, (R) is False
4.
(A) is False, (R) is False
Subtopic: Transcription |
78%
From NCERT
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What facilitates the opening of the helix in order to allow continued elongation of transcription?
1. RNA polymerase
2. DNA polymerase
3. DNA helicase
4. DNA ligase
Subtopic: Transcription |
From NCERT
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Consider the following two statements:
Griffith discovered
A: DNA, and not protein, is the genetic material.
B: The process of bacterial transformation.
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Neither A nor B are correct.
Subtopic: Search for Genetic Material |
68%
From NCERT
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Consider the following two statements:
| A: | The genetic code is degenerate. |
| B: | The genetic code is ambiguous. |
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Subtopic: Genetic Code |
69%
From NCERT
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Consider the following two statements:
DNA is a better molecule for storage of genetic information than RNA because
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
DNA is a better molecule for storage of genetic information than RNA because
| A: | DNA is capable of making its own replica, while RNA cannot make its own replica. |
| B: | DNA is structurally more stable and chemically more inert than RNA. |
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Subtopic: DNA vs RNA as Genetic Material |
67%
From NCERT
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Which of the following experiments in molecular biology unequivocally showed that DNA is the genetic material in bacteriophages?
1. Meselson-Stahl experiment
2. Hershey-Chase experiment
3. Delbrück-Luria experiment
4. Beadle-Tatum experiment
1. Meselson-Stahl experiment
2. Hershey-Chase experiment
3. Delbrück-Luria experiment
4. Beadle-Tatum experiment
Subtopic: Search for Genetic Material |
91%
From NCERT
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Which subunit of the RNA polymerase holoenzyme allows it to initiate the process of transcription?
| 1. | Rho | 2. | Sigma |
| 3. | Omega | 4. | Epsilon |
Subtopic: Transcription |
88%
From NCERT
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In a tRNA molecule, the attachment site for an amino acid is located:
1. At its 3' end
2. At its 5' end
3. In the anticodon loop
4. In the DHU loop
1. At its 3' end
2. At its 5' end
3. In the anticodon loop
4. In the DHU loop
Subtopic: Genetic Code |
60%
From NCERT
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When chromatin is observed under electron microscope, which of the following appears as ‘beads on string’ structure?
1. Nucleosome
2. Solenoid
3. Filament
4. Supercoiled filament
1. Nucleosome
2. Solenoid
3. Filament
4. Supercoiled filament
Subtopic: DNA Packaging |
95%
From NCERT
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Which of the following, if used in Avery, Macleod and McCarty experiment, will affect transformation?
1. RNase
2. DNase
3. Protease
4. Lipase
1. RNase
2. DNase
3. Protease
4. Lipase
Subtopic: Search for Genetic Material |
92%
From NCERT
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