Q. No.What is it that forms the basis of DNA Fingerprinting?
1.
The relative proportions of purines and pyrimidines in DNA.
2.
The relative difference in the DNA occurrence in blood, skin, and saliva.
3.
The relative amount of DNA in the ridges and grooves of the fingerprints.
4.
Satellite DNA occurring as highly repeated short DNA segments
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Select the correct option:
|
The direction of RNA synthesis |
The direction of reading of the template DNA strand |
|
|
1. |
5' - 3' |
3' - 5' |
|
2. |
3' - 5' |
5' - 3' |
|
3. |
5' - 3' |
5' - 3' |
|
4. |
3' - 5' |
3' - 5' |
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Which of the following is not required for any of the techniques of DNA fingerprinting available at present?
| 1. | DNA -DNA hybridization | 2. | Polymerase chain reaction |
| 3. | Zinc finger analysis | 4. | Restriction enzymes |
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Taylor conducted experiments to prove the semiconservative mode of chromosome replication on:
| 1. | E. coli | 2. | Vinca rosea |
| 3. | Vicia faba | 4. | Drosophila melanogaster |
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If there are 999 bases in RNA that code for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
| 1. | 1 | 2. | 11 |
| 3. | 33 | 4. | 333 |
Identifying all the genes in the genome that are transcribed into RNA is called:
| 1. | Expressed Sequence Tag | 2. | Sequence Annotation |
| 3. | Inverse PCR | 4. | Retrotransposition |
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For the multiplication of any alien piece of DNA in an organism it needs to be a part of a chromosome that has a specific:
| 1. | Telomeric sequence | 2. | Multiple cloning site |
| 3. | Ori | 4. | Selectable marker |
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Griffith co-injected the heat-killed S and live R strains of Pneumococcus bacterium into the mice and much to his surprise the mice developed pneumonia and died. He concluded that:
| I: | Live R was transformed into Live S strain as he was able to isolate Live S strain from the blood of the infected mice. |
| II: | Bacterial transformation is a stable and heritable change as the culture of bacteria isolated from dead mice was unable to infect other mice. |
| 1. | Both I and II are correct |
| 2. | Only I is correct |
| 3. | Only II is correct |
| 4. | Both I and II are incorrect |
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The radius of the double helix of B-DNA [Watson and Crick model] is approximately:
| 1. | 1.0 nm | 2. | 2.0 nm |
| 3. | 0.34 nm | 4. | 3.4 nm |
An RNA primer is essential for DNA synthesis carried out by DNA polymerase III. This is because, to synthesize DNA, DNA polymerase III requires:
| 1. | A free 3’ – PO4 group |
| 2. | A free 5’ – PO4 group |
| 3. | A free 3’ – OH group |
| 4. | A free 5’ – OH group |
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