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Q. No.Which one of the following DNA molecules will melt at the lowest temperature?
1. 5'TGCAGCGGCAGCG3'
3'ACGTCGCCGTCGC5'
2. 5'CCCGGACCGATGC3'
3'GGGCCTGGCTACG5'
3. 5'AATTAAACGCAATA3'
3'TTAATTTGCGTTAT5'
4. 5'GGCCATCCGTGCC3'
3'CCGGTAGGCACGG5'
Subtopic: DNA Double Helix |
69%
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Subtopic: Transcription |
65%
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Mark the mismatched pair.
| 1. | UGG - Non-degenerate codon |
| 2. | GUG - Non-ambiguous codon |
| 3. | UAG - Non-sense codon |
| 4. | AUG - Initiator codon |
Subtopic: Genetic Code |
59%
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Consider the following statements and state true (T) or false (F)
A : In the prokaryotes, control of the rate of transcriptional initiation is the predominant site for control of gene expression.
B : Lac i is a constitutive gene of lac operon
C : Tryptophan operon has five structural genes
A : In the prokaryotes, control of the rate of transcriptional initiation is the predominant site for control of gene expression.
B : Lac i is a constitutive gene of lac operon
C : Tryptophan operon has five structural genes
| A | B | C | |
| (1) | F | T | F |
| (2) | F | F | T |
| (3) | T | T | F |
| (4) | T | T | T |
Subtopic: Gene Regulation: Lac Operon |
54%
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VNTRs are
a. Small DNA sequences arranged tandemly in many copy number.
b. Surrounded by conserved restriction sites.
c. Microsatellites
d. Present in the same copy number in different chromosomes of an individual.
1. a and b
2. b and c
3. c and d
4. a and d
a. Small DNA sequences arranged tandemly in many copy number.
b. Surrounded by conserved restriction sites.
c. Microsatellites
d. Present in the same copy number in different chromosomes of an individual.
1. a and b
2. b and c
3. c and d
4. a and d
Subtopic: DNA Fingerprinting |
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In prokaryotes, DNA gyrase has _______ activity.
1. Exonuclease
2. Topoisomerase
3. Ligase
4. Polymerase
1. Exonuclease
2. Topoisomerase
3. Ligase
4. Polymerase
Subtopic: DNA Replication |
69%
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Untranslated regions are
1. Present at 5' end of mRNA after start codon
2. Not required for efficient translation process
3. Present at 3' end before stop codon
4. Present at both 5' and 3' end of mRNA.
1. Present at 5' end of mRNA after start codon
2. Not required for efficient translation process
3. Present at 3' end before stop codon
4. Present at both 5' and 3' end of mRNA.
Subtopic: Translation |
82%
From NCERT
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Statement A : During transcription a nucleic acid is copied form another nucleic acid.
Statement B : The primary transcripts contain both the exons and the introns and are non-functional.
1. Only statement A is correct
2. Only statement B is correct
3. Both statements A and B are correct
4. Both statements A and B are incorrect
Statement B : The primary transcripts contain both the exons and the introns and are non-functional.
1. Only statement A is correct
2. Only statement B is correct
3. Both statements A and B are correct
4. Both statements A and B are incorrect
Subtopic: Transcription |
75%
From NCERT
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If there are \(24 \times 10^8\) bp in an eukaryotic cell, then what will be the number of nucleosomes present in the nucleus?
1. \(12 \times 10^6 \)
2. \(12 \times 10^8\)
3. \(1.2 \times 10^8\)
4. \(2.4 \times 10^8 \)
1. \(12 \times 10^6 \)
2. \(12 \times 10^8\)
3. \(1.2 \times 10^8\)
4. \(2.4 \times 10^8 \)
60%
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Read the given statements and select the correct option.
Statement A : Prokaryotes have single origin of replication which is called ori-c in E.coli
Statement B : QB bacteriophage has RNA as their genetic material.
1. Only statement A is incorrect
2. Only statement B is incorrect
3. Both statements A and B are incorrect
4. Both statements A and B are correct
Statement A : Prokaryotes have single origin of replication which is called ori-c in E.coli
Statement B : QB bacteriophage has RNA as their genetic material.
1. Only statement A is incorrect
2. Only statement B is incorrect
3. Both statements A and B are incorrect
4. Both statements A and B are correct
66%
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