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Q. No.How many types of DNA polymerases are associated with eukaryotic cell?
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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Tryptophan operon is
1. Catabolic system
2. Repressible system
3. Inducible system
4. Having three structural genes
1. Catabolic system
2. Repressible system
3. Inducible system
4. Having three structural genes
Subtopic: Gene Regulation: Lac Operon |
56%
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The synthesis of DNA is discontinuous on one strand of the replication fork because:
| 1. | DNA molecule being synthesised is very long |
| 2. | DNA-dependent DNA polymerase catalyse polymerisation only in one direction \((5' \rightarrow 3')\) |
| 3. | It is a more efficient process |
| 4. | It help to use DNA ligase |
Subtopic: The DNA | DNA Double Helix |
90%
From NCERT
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If a radiolable is used to tag a DNA molecule, the technique used to localise would be
1. X-ray crystallography
2. Autoradiography
3. Fluorescence microscopy
4. Electron microscopy
1. X-ray crystallography
2. Autoradiography
3. Fluorescence microscopy
4. Electron microscopy
Subtopic: Human Genome Project | DNA Fingerprinting |
78%
From NCERT
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Match the following with their functions.
1. i-b, ii-a, iii-c,
2. i-,a, ii-b, iii-c
3. i-b, ii-c, iii-a
4. i-c, ii-a, iii-b
| Column I | Column II | ||
| i. | m-RNA | a. | Carries activated amino acids for elongation of polypeptide chain. |
| ii. | r-RNA | b. | Carries genetic information from nucleus to the site of protein synthesis. |
| ii. | t-RNA | c. | Associated with ribosome. |
2. i-,a, ii-b, iii-c
3. i-b, ii-c, iii-a
4. i-c, ii-a, iii-b
Subtopic: Translation |
77%
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Match the following with their percentage composition of the total cell RNA.
1. i-b, ii-a, iii-c,
2. i-,a, ii-b, iii-c
3. i-b, ii-c, iii-a
4. i-c, ii-a, iii-b
| Column I | Column II | ||
| i. | m-RNA | a. | \(80 \%\) |
| ii. | r-RNA | b. | \(10-15 \%\) |
| ii. | t-RNA | c. | \(3 \%\) |
2. i-,a, ii-b, iii-c
3. i-b, ii-c, iii-a
4. i-c, ii-a, iii-b
Subtopic: Translation |
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Given below is a sequence of bases in mRNA of a bacterial cell. Identify the amino acid that would be incorporated at codon position 3 and codon position 5 during the process of its translation.
3'AUCAGGUUUGUGAUGGUACGA5'
1. Phenylalanine, Methionine
2. Cysteine, Glycine
3. Alanine, Proline
4. Serine, Valine
3'AUCAGGUUUGUGAUGGUACGA5'
1. Phenylalanine, Methionine
2. Cysteine, Glycine
3. Alanine, Proline
4. Serine, Valine
Subtopic: Genetic Code |
71%
From NCERT
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