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Q. No.The accessibility of promoter regions of bacterial DNA in many cases regulated by the interaction of proteins with sequences termed
1. Regulators
2. structural genes
3. Inhibitor genes
4. Operators
Subtopic: Gene Regulation: Lac Operon |
53%
From NCERT
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Splicing is necessary for preparing a mature transcript and its movement to cytoplasm. It requires
1. scRNA and proteins
2. snRNA and proteins
3. scRNA and snRNA
4. scRNA only
1. scRNA and proteins
2. snRNA and proteins
3. scRNA and snRNA
4. scRNA only
Subtopic: Transcription |
79%
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The DNA strand showing replication using Okazaki fragments also shows
1. Continuous growth in 5' → 3' direction
2. Discontinuous growth on 5' → 3' parental strand
3. Discontinuous growth on 3' → 5' parental strand
4. Involvement of one primer only
1. Continuous growth in 5' → 3' direction
2. Discontinuous growth on 5' → 3' parental strand
3. Discontinuous growth on 3' → 5' parental strand
4. Involvement of one primer only
Subtopic: DNA Replication |
72%
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Prokaryotic transcription mechanism requires involvement of only one polymerase type and
(a) It occurs in cytoplasm only
(b) It is often coupled with translation
(c) It does not require splicing but capping is essential
1. All are correct
2. Both (b) & (c)
3. Both (a) & (c)
4. Only (c) is incorrect
(a) It occurs in cytoplasm only
(b) It is often coupled with translation
(c) It does not require splicing but capping is essential
1. All are correct
2. Both (b) & (c)
3. Both (a) & (c)
4. Only (c) is incorrect
Subtopic: Transcription |
57%
From NCERT
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Pribnow box is a consensus of ________ bases, forming a binding site for E. coli RNA polymerase at promotor
1. TATAAT
2. AGGAGG
3. CAAT
4. GC
1. TATAAT
2. AGGAGG
3. CAAT
4. GC
Subtopic: Transcription |
74%
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In tailing, adenylate residues are added at 3'end
1. With the help of gyanyl transferase
2. In a template independent manner
3. With the help of methyl transferase
4. Of hn-RNA of E.coli
1. With the help of gyanyl transferase
2. In a template independent manner
3. With the help of methyl transferase
4. Of hn-RNA of E.coli
Subtopic: Transcription |
71%
From NCERT
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For every single amino acid incorporated in peptide chain _______ ATP and ________GTP molecules are used.
1. 1, 4
2. 1, 6
3. 1, 2
4. 1, 3
1. 1, 4
2. 1, 6
3. 1, 2
4. 1, 3
Subtopic: Translation |
60%
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In t-RNA
1. CCA - OH is present at 5-end
2. T\(\Psi\)C loop for attaching the amino acid
3. DHU loop for binding with AA - activating enzyme
4. There are three recognition sites
1. CCA - OH is present at 5-end
2. T\(\Psi\)C loop for attaching the amino acid
3. DHU loop for binding with AA - activating enzyme
4. There are three recognition sites
Subtopic: Translation |
52%
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Repetitive sequences are stretches of DNA with repeated bases many times in a genome, but
(a) These sequences are of no transcriptional function
(b) These are associated with euchromatin region
(c) These helps to identify a person on the basis of its DNA specificity
1. All are correct
2. Only (b) is incorrect
3. Both (a) & (b) are correct
4. Both (b) & (c) are incorrect
(a) These sequences are of no transcriptional function
(b) These are associated with euchromatin region
(c) These helps to identify a person on the basis of its DNA specificity
1. All are correct
2. Only (b) is incorrect
3. Both (a) & (b) are correct
4. Both (b) & (c) are incorrect
Subtopic: DNA Packaging |
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Subtopic: DNA Fingerprinting |
57%
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