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Q. No.The genes in eukaryotes are said to be split as
1. They have introns only
2. They have interrupted coding sequences
3. Mature mRNA contains both exons and introns
4. They have exons only
Subtopic: Transcription |
69%
From NCERT
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Select the true statement(s) for AUG.
A. It codes for an amino acid methionine
B. It is an initiation codon
C. It is a non-degenerate codon
1. Only A
2. Only A and B
3. Only B and C
4. All A, B and C
A. It codes for an amino acid methionine
B. It is an initiation codon
C. It is a non-degenerate codon
1. Only A
2. Only A and B
3. Only B and C
4. All A, B and C
Subtopic: Genetic Code |
67%
From NCERT
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Mark the wrong statement.
1. In prokaryotes, transcription and translation occur in the different compartments
2. In eukaryotes, usually structural gene of transcription unit is monocistronic
3. In prokaryotes, the mRNA is produced in the cytoplasm
4. In eukaryotes, the primary transcript undergoes splicing
1. In prokaryotes, transcription and translation occur in the different compartments
2. In eukaryotes, usually structural gene of transcription unit is monocistronic
3. In prokaryotes, the mRNA is produced in the cytoplasm
4. In eukaryotes, the primary transcript undergoes splicing
Subtopic: Transcription |
79%
From NCERT
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In prokaryotic translation, the formation of peptide bond between two amino acids is catalysed by a
1. Proteinaceous enzyme
2. Lysozyme
3. RNA catalyst
4. Ribonuclease
1. Proteinaceous enzyme
2. Lysozyme
3. RNA catalyst
4. Ribonuclease
Subtopic: Translation |
68%
From NCERT
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The experimental proof for semiconservative mode of DNA replication was first shown in a bacterium, by
1. Meselson and Stahl
2. Hershey and Chase
3. Jacob and Monod
4. Alec Jeffreys
1. Meselson and Stahl
2. Hershey and Chase
3. Jacob and Monod
4. Alec Jeffreys
Subtopic: DNA Replication |
81%
From NCERT
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Heterochromatin is
(a) Darkly stained
(b) Loosely packed chromatin
(c) Transcriptionally inactive
1. Only (a)
2. Only (a) and (b)
3. Only (b) and (c)
4. Only (a) and (c)
(a) Darkly stained
(b) Loosely packed chromatin
(c) Transcriptionally inactive
1. Only (a)
2. Only (a) and (b)
3. Only (b) and (c)
4. Only (a) and (c)
Subtopic: DNA Packaging |
87%
From NCERT
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Select true (T) or false (F) for the following statements and choose the correct option.
A. QB bacteriophage has RNA as genetic material.
B. Free 2'OH of RNA makes it more labile and easily degradable.
C. The experiment of Hershey and Chase gave unequivocal proof that DNA is the genetic material.
A. QB bacteriophage has RNA as genetic material.
B. Free 2'OH of RNA makes it more labile and easily degradable.
C. The experiment of Hershey and Chase gave unequivocal proof that DNA is the genetic material.
| A | B | C | |
| 1. | T | F | T |
| 2. | F | F | T |
| 3. | T | T | T |
| 4. | T | F | F |
Subtopic: The DNA | DNA vs RNA as Genetic Material | Search for Genetic Material |
76%
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Polymorphism in DNA sequence is the basis of which of the following?
(a) Genetic mapping of human genome
(b) DNA fingerprinting
(c) Similarities among human beings
1. Only (a)
2. Only (b)
3. Only (a) and (b)
4. Only (b) and (c)
(a) Genetic mapping of human genome
(b) DNA fingerprinting
(c) Similarities among human beings
1. Only (a)
2. Only (b)
3. Only (a) and (b)
4. Only (b) and (c)
Subtopic: Human Genome Project | DNA Fingerprinting |
85%
From NCERT
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Satellite DNA
1. Codes for proteins which are needed in the chloroplast
2. Codes enzymes for Krebs' cycle
3. Does not code for proteins
4. Form a little portion of human genome
1. Codes for proteins which are needed in the chloroplast
2. Codes enzymes for Krebs' cycle
3. Does not code for proteins
4. Form a little portion of human genome
Subtopic: DNA Fingerprinting |
75%
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Which one of the following statements is not correct w.r.t. DNA packaging?
1. Histones are rich in basic amino acids, lysines and arginines
2. Positively charged DNA is wrapped around the negatively charged histone octamer to form a nucleosome
3. Linker DNA contains about 80 bp
4. Loosely packed chromatins are euchromatin
1. Histones are rich in basic amino acids, lysines and arginines
2. Positively charged DNA is wrapped around the negatively charged histone octamer to form a nucleosome
3. Linker DNA contains about 80 bp
4. Loosely packed chromatins are euchromatin
Subtopic: DNA Packaging |
84%
From NCERT
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