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Q. No.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
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%
From NCERT
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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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A. The nascent RNA synthesised by RNA polymerase II is called hnRNA.
B. Splicing is the process of removal of introns and joining of exons in a defined order.
1. Only A is correct
2. Both A and B are incorrect
3. Only B is correct
4. Both A and B are correct
B. Splicing is the process of removal of introns and joining of exons in a defined order.
1. Only A is correct
2. Both A and B are incorrect
3. Only B is correct
4. Both A and B are correct
Subtopic: Transcription |
79%
From NCERT
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In an mRNA, UTRs are present
1. AT 5' end only
2. Before stop codon only
3. After start codon only
4. Both, before start codon after stop codon
1. AT 5' end only
2. Before stop codon only
3. After start codon only
4. Both, before start codon after stop codon
Subtopic: Translation |
92%
From NCERT
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Human genome project was closely associated with the rapid development of a new area in biology called _____.
1. Biotechnology
2. Bioinformatics
3. Biofortification
4. Microbiology
1. Biotechnology
2. Bioinformatics
3. Biofortification
4. Microbiology
Subtopic: Human Genome Project |
93%
From NCERT
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The technique of DNA fingerprinting was developed by
1. Lalji Singh
2. V.K. Kashyap
3. Alec Jeffreys
4. Kim and Klug
1. Lalji Singh
2. V.K. Kashyap
3. Alec Jeffreys
4. Kim and Klug
Subtopic: DNA Fingerprinting |
95%
From NCERT
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