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Q. No.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
Subtopic: DNA Packaging |
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Subtopic: DNA Fingerprinting |
57%
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In tryptophan operon
1. Non-proteinaceous aporepressor is synthesised by R-gene
2. Normally chorismic acid is not converted into tryptophan
3. Repression is mostly connected with a catabolic pathway
4. Enzymes produced by structural genes normally present in the cell
1. Non-proteinaceous aporepressor is synthesised by R-gene
2. Normally chorismic acid is not converted into tryptophan
3. Repression is mostly connected with a catabolic pathway
4. Enzymes produced by structural genes normally present in the cell
Subtopic: Gene Regulation: Lac Operon |
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Which of the following DNA forms has maximum number of base pairs per turn?
1. A-DNA
2. B-DNA
3. C-DNA
4. Z-DNA
1. A-DNA
2. B-DNA
3. C-DNA
4. Z-DNA
Subtopic: The DNA | DNA Double Helix |
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Non-histone proteins
1. Are of five types
2. Are involved in nucleosome formation
3. Control gene expression
4. Are basic proteins
1. Are of five types
2. Are involved in nucleosome formation
3. Control gene expression
4. Are basic proteins
Subtopic: DNA Packaging |
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Subtopic: DNA Replication |
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How many types of DNA polymerases are associated with eukaryotic cell?
1. Three
2. Four
3. Five
4. Two
1. Three
2. Four
3. Five
4. Two
Subtopic: DNA Replication |
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Find the incorrect match
| 1. | Central dogma | : | F. Crick |
| 2. | Reverse central dogma | : | Temin and Baltimore |
| 3. | Split genes | : | Kornberg |
| 4. | mRNA | : | Jacob and Monad |
Subtopic: The DNA | Transcription |
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Recognition sequence for transcription in prokaryotes is
1. TATATAT
2. TATAAT
3. TATAAAT
4. CAAT
1. TATATAT
2. TATAAT
3. TATAAAT
4. CAAT
Subtopic: Translation |
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In the mitochondrial DNA, UGA codes for
1. Chain termination
2. Chain initiation
3. Tryptophan
4. Tyrosine
1. Chain termination
2. Chain initiation
3. Tryptophan
4. Tyrosine
Subtopic: Genetic Code |
From NCERT
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