Consider the two statements:
Assertion (A):
When Griffith injected a mixture of heat-killed S and live R bacteria, the mice died.
Reason (R):
Mice infected with the S strain (virulent) die from pneumonia infection but mice infected with the R strain do not develop pneumonia.
1.
Both (A) and (R) are True and (R) is the correct explanation of (A).
2.
Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.
(A) is True but (R) is False.
4.
Both (A) and (R) are False.
Subtopic: Search for Genetic Material |
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Regarding DNA replication:
I: It is semi-conservative.
II: It is semi-discontinuous.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: It is semi-conservative.
II: It is semi-discontinuous.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: DNA Replication |
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Subtopic: Transcription |
81%
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The repressor of the lac operon is synthesised:
| 1. | all the time |
| 2. | only when lactose is present |
| 3. | only when lactose is absent |
| 4. | only when glucose is present in high amount |
Subtopic: Gene Regulation: Lac Operon |
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Consider the two statements:
| Assertion (A): | Transcription and translation can be coupled in bacteria. |
| Reason (R): | The peptide bond formation in prokaryotes is catalysed by a ribozyme. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A) |
Subtopic: Transcription |
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In a transcription unit, the location of promoter is described as:
| 1. | at the 3' end, downstream of the structural gene |
| 2. | at the 3' end, upstream of the structural gene |
| 3. | at the 5' end, upstream of the structural gene |
| 4. | at the 5' end, downstream of the structural gene |
Subtopic: Transcription |
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The ribozyme that catalyses peptide bond formation in prokaryotes is a part of:
| 1. | the larger subunit of the bacterial ribosome |
| 2. | the smaller subunit of the bacterial ribosome |
| 3. | the 5’ UTR of the mRNA |
| 4. | the 3’ UTR of the mRNA |
Subtopic: Translation |
63%
From NCERT
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Histones are:
1. positively charged basic proteins
2. negatively charged basic proteins
3. positively charged acidic proteins
4. negatively charged acidic proteins
1. positively charged basic proteins
2. negatively charged basic proteins
3. positively charged acidic proteins
4. negatively charged acidic proteins
Subtopic: DNA Packaging |
92%
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For DNA replication, deoxyribonucleoside triphosphates:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | act as substrates |
| II: | provide energy for polymerisation reaction |
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: DNA Replication |
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The predominant site for the control of gene expression in prokaryotes is:
1. Transcription initiation
2. Processing of hnRNA
3. Translational level
4. Post translational modification
1. Transcription initiation
2. Processing of hnRNA
3. Translational level
4. Post translational modification
Subtopic: Gene Regulation: Introduction | Gene Regulation: Lac Operon |
80%
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