Q. No.DNA replication is correctly described as:
1.
Semi-conservative and Continuous
2.
Semi-conservative and Discontinuous
3.
Conservative and Continuous
4.
Semi-conservative and Semi-discontinuous
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Which of the following acts as a ribozyme for peptide bond formation in bacteria?
| 1. | 5s rRNA | 2. | 23s rRNA |
| 3. | 16s rRNA | 4. | 5.1s rRNA |
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Histones are:
| 1. | Positively charged and basic amino acids |
| 2. | Negatively charged and basic proteins |
| 3. | Positively charged and acidic proteins |
| 4. | Not found in bacteria |
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Which of the following anticodons will hybridize with the mRNA codon 5’ – AUG – 3’?
| 1. | 5’ – UAC – 3’ | 2. | 5’ – TAC – 3’ |
| 3. | 3’ – UAC – 5’ | 4. | 3’ – TAC – 5’ |
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Some amino acids are coded by more than one codon. Hence genetic code is:
| 1. | Unambiguous | 2. | Non-specific |
| 3. | Degenerate | 4. | Universal |
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The length of DNA in a typical mammalian cell is approximately:
| 1. | 1.1 meter | 2. | 1.5 meter |
| 3. | 2.2 meter | 4. | 3.3 meter |
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A very low level of expression of the lac operon has to be present in the cell:
| 1. | When lactose is present | 2. | When lactose is absent |
| 3. | When glucose is absent | 4. | All the time |
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Which of the following is not a feature of the double helix model of DNA?
| 1. | The two chains have anti-parallel polarity |
| 2. | A purine always comes opposite to a pyrimidine |
| 3. | The pitch of the DNA is 3.4 nm |
| 4. | The two chains are coiled in a left handed fashion |
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In RNA splicing:
| 1. | Exons are removed and introns are joined together |
| 2. | Introns are removed and exons are joined together |
| 3. | Cistrons are removed and introns are joined together |
| 4. | Introns are removed and Cistrons are joined together |
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