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
Subtopic: Gene Regulation: Introduction | Gene Regulation: Lac Operon |
80%
From NCERT
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Consider the two statements:
| Statement I: | DNA has evolved from RNA with chemical modifications that make it more stable. |
| Statement II: | DNA being double stranded and having complementary strands further resists changes by evolving a process of repair. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement II is incorrect; Statement I is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: DNA vs RNA as Genetic Material |
89%
From NCERT
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The bacteriophage φ X 174 has:
1. 5386 nucleotides
2. 48502 base pairs
3. 4.6 X 106 base pairs
4. 3.3 X 109 base pairs
Subtopic: The DNA |
84%
From NCERT
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In eukaryotes, during post-transcriptional modification of hnRNA:
| 1. | methyl guanosine triphosphate is added to the 5’ end and adenylate residues are added at the 3‘ end |
| 2. | methyl guanosine triphosphate is added to the 3’ end and adenylate residues are added at the 5‘ end |
| 3. | methyl adenosine triphosphate is added to the 5’ end and guanylate residues are added at the 3‘ end |
| 4. | methyl adenosine triphosphate is added to the 3’ end and guanylate residues are added at the 5‘ end |
Subtopic: Transcription |
84%
From NCERT
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A gene is said to be polymorphic if it has more than one variant and the frequency of the least common variant is at least:
1. 0.01
2. 0.1
3. 0.5
4. 1.0
1. 0.01
2. 0.1
3. 0.5
4. 1.0
Subtopic: The DNA |
60%
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The sequence on the template strand of DNA which will be responsible for the insertion of the first amino acid into a protein will be:
1. TAC
2. AUG
3. CAT
4. ACT
1. TAC
2. AUG
3. CAT
4. ACT
Subtopic: Translation | Genetic Code |
From NCERT
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Consider the two statements:
| Statement I: | In eukaryotes, RNA polymerase II transcribes hnRNA. |
| Statement II: | There is a single RNA polymerase that catalyses transcription of all types of RNA in bacteria. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is incorrect; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Transcription |
86%
From NCERT
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Subtopic: Human Genome Project |
74%
From NCERT
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What percent of the human DNA actually codes for proteins?
1. Less than 2%
2. Around 20%
3. Between 35% and 40%
4. More than 98%
1. Less than 2%
2. Around 20%
3. Between 35% and 40%
4. More than 98%
Subtopic: Human Genome Project |
94%
From NCERT
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If a sample of single stranded DNA contains 23 % adenine bases of total, what is the expected percentage of guanine bases in this sample of DNA?
| 1. | 23 |
| 2. | 27 |
| 3. | 46 |
| 4. | Cannot be determined on the basis of information given |
Subtopic: DNA Double Helix |
From NCERT
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