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Q. No.Consider the given two statements:
Assertion (A):
There is, approximately, a uniform distance between the two strands of the double helix of DNA.
Reason (R):
A purine on one strand comes opposite to a pyrimidine on the other strand of the double helix of DNA.
1.
Both (A) and (R) are True but (R) does not correctly explain (A)
2.
(A) is False but (R) is True.
3.
(A) is True but (R) is False.
4.
Both (A) and (R) are True and (R) correctly explains (A).
Subtopic: DNA Double Helix |
77%
From NCERT
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Consider the given two statements:
| Assertion (A): | Euchromatin is said to be transcriptionally inactive chromatin. |
| Reason (R): | In a typical nucleus, euchromatin is the region of chromatin that is loosely packed and stains light. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: DNA Packaging |
87%
From NCERT
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Consider the given two statements:
| Assertion: | Viruses grown in the presence of radioactive phosphorus will contain radioactive protein but not radioactive DNA. |
| Reason: | DNA contains phosphorus but protein does not. |
| 1. | Both Assertion and Reason are true and Reason correctly explains the Assertion. |
| 2. | Assertion is true but Reason is false. |
| 3. | Both Assertion and Reason are true but Reason does not correctly explain the Assertion. |
| 4. | Assertion is false but Reason is true. |
Subtopic: Search for Genetic Material:I |
86%
From NCERT
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Consider the given two statements:
| Assertion (A): | Among the two nucleic acids, the DNA and the RNA, DNA is a better genetic material. |
| Reason (R): | DNA chemically is less reactive and structurally more stable when compared to RNA. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Search for Genetic Material: II |
95%
From NCERT
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Consider the given two statements:
| Assertion (A): | RNA can directly code for the synthesis of proteins and can easily express the characters. |
| Reason (R): | DNA is dependent on RNA for synthesis of proteins. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A) . |
Subtopic: Search for Genetic Material: II |
76%
From NCERT
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Consider the given two statements:
| Assertion (A): | Deoxyribonucleoside triphosphates provide energy for polymerisation reaction during DNA replication. |
| Reason (R): | Energetically replication of DNA is a very expensive process. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: DNA Replication: II |
From NCERT
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Consider the given two statements:
| Assertion (A): | On one strand, the template with polarity 3' - 5', the DNA replication is discontinuous, while on the other, the template with polarity 5' -3', it is continuous. |
| Reason (R): | The DNA-dependent DNA polymerases catalyse polymerisation only in one direction that is, 5' - 3'. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: DNA Replication: II |
70%
From NCERT
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Consider the given two statements:
| Assertion (A): | If both strands of DNA act as a template, they would code for RNA molecule with different sequences. |
| Reason (R): | Complementarity does not mean identical. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
Subtopic: Transcription:II |
53%
From NCERT
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Consider the given two statements:
| Assertion (A): | It is the presence of a promoter in a transcription unit that also defines the template and coding strands. |
| Reason (R): | The promoter is said to be located towards 5'-end (upstream) of the structural gene (the reference is made with respect to the polarity of coding strand). |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: Transcription:II |
From NCERT
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Consider the given two statements:
| Assertion (A): | Transcription and translation can be coupled in bacteria. |
| Reason (R): | In bacteria, mRNA does not require any processing to become active, and transcription and translation take place in the same compartment. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Transcription: IV |
90%
From NCERT
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