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Q. No.If the sequence of one strand of DNA is 5' A T G C A T C G 3', find the sequence of complementary strand in 5' → 3' direction
1. T A C G T A G C
2. C G A T G C A T
3. A T G C A T C G
4. A T C G T A C G
Subtopic: Transcription |
61%
Level 2: 60%+
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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%
Level 1: 80%+
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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 |
70%
Level 2: 60%+
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Select the important goals of HGP from the given options :
(i) Store the information for data analysis.
(ii) Cloning and amplification of human DNA.
(iii) Identify all the genes present in human DNA.
(iv) Use of DNA information to trace human history.
1. (i) and (ii)
2. (ii) and (iii)
3. (i) and (iii)
4. (ii) and (iv)
(i) Store the information for data analysis.
(ii) Cloning and amplification of human DNA.
(iii) Identify all the genes present in human DNA.
(iv) Use of DNA information to trace human history.
1. (i) and (ii)
2. (ii) and (iii)
3. (i) and (iii)
4. (ii) and (iv)
Subtopic: Human Genome Project |
80%
Level 1: 80%+
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'A codon is a Triplet of bases was suggested by :
1. Marshall Nirenberg
2. Har Gobind Khorana
3. George Gamow
4. Francis Crick
1. Marshall Nirenberg
2. Har Gobind Khorana
3. George Gamow
4. Francis Crick
Subtopic: Genetic Code |
73%
Level 2: 60%+
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The correct feature of double-helical structure of DNA as given by Watson and Crick is:
1. Right-handed helix, pitch is \(3.4~ \text {nm}\)
2. Left-handed helix, pitch is \(3.8~ \text {nm}\)
3. Right-handed helix, pitch is \(3.8~ \text {nm}\)
4. Left-handed helix, pitch is \(3.4~ \text {nm}\)
1. Right-handed helix, pitch is \(3.4~ \text {nm}\)
2. Left-handed helix, pitch is \(3.8~ \text {nm}\)
3. Right-handed helix, pitch is \(3.8~ \text {nm}\)
4. Left-handed helix, pitch is \(3.4~ \text {nm}\)
Subtopic: DNA Double Helix |
91%
Level 1: 80%+
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Charging of tRNA during translation is necessary for :
1. Binding of anticodons of tRNA to the respective codons of mRNA.
2. Peptide bond formation between two amino acids.
3. Movement of ribosomes from codon to codon.
4. Binding of ribosomes to the mRNA.
1. Binding of anticodons of tRNA to the respective codons of mRNA.
2. Peptide bond formation between two amino acids.
3. Movement of ribosomes from codon to codon.
4. Binding of ribosomes to the mRNA.
Subtopic: Translation |
59%
Level 3: 35%-60%
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If E. coli were allowed to grow in the culture medium for 80 minutes by Matthew Meselson and Franklin Stahl in their experiments, the proportion of light and hybrid density DNA molecule would have been:
1. 87.5% of light density DNA and 12.5% of hybrid density DNA.
2. 75.0% of light density DNA and 25% of hybrid density DNA.
3. 50% of light density DNA and 50% of hybrid density DNA.
4. 12.5% of light density DNA and 87.5% of hybrid density DNA.
1. 87.5% of light density DNA and 12.5% of hybrid density DNA.
2. 75.0% of light density DNA and 25% of hybrid density DNA.
3. 50% of light density DNA and 50% of hybrid density DNA.
4. 12.5% of light density DNA and 87.5% of hybrid density DNA.
Subtopic: DNA Replication |
69%
Level 2: 60%+
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A diagramatic illustration of the process of transcription by RNA polymerase-II in eukaryote is given below. Choose the most appropriate statement with respect to the fate of the precursor of mRNA transcribed that will be :
1. Translation will take place once the precursor of mRNA leaves the nucleus.
2. Translation on mRNA will not take place once the precursor of mRNA leaves the nucleus.
3. Translation will take place in the nucleus.
4. The precursor of mRNA has to be processed further in next step before being translated.
1. Translation will take place once the precursor of mRNA leaves the nucleus.
2. Translation on mRNA will not take place once the precursor of mRNA leaves the nucleus.
3. Translation will take place in the nucleus.
4. The precursor of mRNA has to be processed further in next step before being translated.
Subtopic: Transcription |
Level 3: 35%-60%
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Identify the correct pair of codon with its corresponding pair of amino acid :
| 1. | UAA : Leucine |
| 2. | UGA : Serine |
| 3. | AUG : Histidine |
| 4. | UUU : Phenylalanine |
Subtopic: Genetic Code |
89%
Level 1: 80%+
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