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Q. No.Consider the two statements:
I. Ori’s sites in DNA are A-T rich.
II. A-T base pairs have two hydrogen bonds.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II is not a correct explanation of I
3. I is correct and II is incorrect
4. I is incorrect and II is correct
Subtopic: DNA Double Helix |
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During transcription, a DNA sequence is read by an RNA polymerase, which produces:
1. a complementary, antiparallel RNA strand called a primary transcript.
2. an identical, antiparallel RNA strand called a primary transcript.
3. a complementary, parallel RNA strand called a primary transcript.
4. an identical, antiparallel RNA strand called a final transcript.
1. a complementary, antiparallel RNA strand called a primary transcript.
2. an identical, antiparallel RNA strand called a primary transcript.
3. a complementary, parallel RNA strand called a primary transcript.
4. an identical, antiparallel RNA strand called a final transcript.
Subtopic: Transcription |
79%
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Consider the two statements:
I. In bacteria, translation initiation occurs as soon as the 5' end of an mRNA is synthesized, and translation and transcription are coupled.
II. This is not possible in eukaryotes because transcription and translation are carried out in separate compartments of the cell
1. Both I and II are correct and II explains I
2. Both I and II are correct but II is not a correct explanation of I
3. I is correct and II is incorrect
4. I is incorrect and II is correct
I. In bacteria, translation initiation occurs as soon as the 5' end of an mRNA is synthesized, and translation and transcription are coupled.
II. This is not possible in eukaryotes because transcription and translation are carried out in separate compartments of the cell
1. Both I and II are correct and II explains I
2. Both I and II are correct but II is not a correct explanation of I
3. I is correct and II is incorrect
4. I is incorrect and II is correct
Subtopic: Transcription |
51%
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Consider the two statements:
I. Transcripts of eukaryotic genes cannot be translated by bacteria.
II. Eukaryotic genes contain introns.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
I. Transcripts of eukaryotic genes cannot be translated by bacteria.
II. Eukaryotic genes contain introns.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
Subtopic: Transcription |
66%
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In Hershey and Chase experiment:
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: | Radioactive sulfur-35 was used to label the DNA contained in the T2 phage |
| II: | Radioactive phosphorus-32 was used to label the protein sections of the T2 phage |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Search for Genetic Material |
73%
From NCERT
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The molecule shown in the given figure:
| I. | serve as substrate for DNA replication |
| II. | provide energy for polymerisation reaction |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: DNA Replication: I |
76%
From NCERT
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| Assertion (A): | VNTRs are the basis of DNA fingerprinting by RFLP |
| Reason (R): | VNTRs are polymorphic and are inherited |
| 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: DNA Fingerprinting |
74%
From NCERT
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You start with 15N15N (heavy) DNA of E.coli. After TWO generations in the 14N medium, you expect E. coli cells will contain:
| 1. | 25% 15N15N DNA, 50% 15N14N DNA, and 25% 14N14N DNA. |
| 2. | 50% 15N15N DNA and 50% 14N14N DNA. |
| 3. | 50% 15N15N DNA and 50% 15N14N DNA. |
| 4. | 50% 15N14N DNA and 50% 14N14N DNA. |
Subtopic: DNA Replication |
64%
From NCERT
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If a molecule that can act as a genetic material should be able to generate its replica, which of the following molecules can act as a genetic material?
| I. Proteins | II. DNA | III. RNA |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: DNA vs RNA as Genetic Material |
89%
From NCERT
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The untranslated regions:
| I: | are present at only the 5’ end of the mature mRNA in eukaryotes |
| II: | are not required during translation and hence are spliced out of the mature mRNA |
| 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: Translation |
61%
From NCERT
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