The salient features of the human genome include all of the following except:
1. | The functions are unknown for over 50 % of the discovered genes. |
2. | More than 2 % of the genome codes for proteins. |
3. | Chromosome 1 has the most genes. |
4. | Repeated sequences make up a very large portion of the human genome. |
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The size of VNTR [used in DNA fingerprinting] varies from:
1. | 0.1 to 20 kb | 2. | 20 to 30 kb |
3. | 50 to 100 kb | 4. | 115 to 215 kb |
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In the human genome, the chromosomes with the most and the fewest genes located on them respectively are:
1. | 1 and Y | 2. | X and Y |
3. | 21 and X | 4. | 11 and Y |
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RFLP in DNA fingerprinting utilizes the polymorphism in:
1. | SNPs | 2. | VNTRs |
3. | LINES | 4. | SINES |
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Transfer of electrophoresis-separated DNA fragments to a filter membrane and subsequent fragment detection by probe hybridization is called as:
1. | DNA profiling | 2. | PCR |
3. | Southern blotting | 4. | Elution |
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I: | DNA – deoxyribonucleic acid – is the genetic material, at least for the majority of organisms. |
II: | RNA though it also acts as a genetic material in some viruses, mostly functions as a messenger. |
III. | RNA can function as an adapter, structural, and in some cases as a catalytic molecule. |
1. | Only I and II are correct | 2. | Only I and III are correct |
3. | Only II and III are correct | 4. | I, II, and III are correct |
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Statement I: | A is the 5’ end of the polynucleotide chain and B is the 3’ end of the polynucleotide chain. |
Statement II: | The nitrogenous bases linked to sugar moiety project from the backbone. |
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Statement I: | A shows the hydrogen bonds where a triple bond links Guanine and Cytosine and a double bond links Adenine and Thymine. |
Statement II: | If Adenine in such a dsDNA molecule is found to be 20 %, the amount of Cytosine in this ds DNA molecule is expected to be 20 %. |
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I. | A represents a base pair where the plane of one base pair stacks over the other in the double helix giving the helix more stability in addition to hydrogen bonds. |
II. | There are 10 base pairs in one complete turn of B-dNA. |
III. | B is the backbone constituted by sugar-phosphate. |
IV. | The two strands are parallel-oriented in the same direction with respect to each other. |
V: | The diameter is uniform, around 2.0nm. |
1. | Only I, II, and III | 2. | Only II, III, IV, and V |
3. | Only I, II, III, and V | 4. | I, II, III, IV and V |
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Assertion (A): | The distance between the two strands of the DNA helix is approximately uniform. |
Reason (R): | Base pairing is complementary, where a purine always base pairs with a pyrimidine and a pyrimidine always base pairs with a purine. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
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