Q. No.The distance between a base pair in the DNA double helix is approximately:
1. 2.0 nm 2. 0.34 nm 3. 20 nm 4. 3.4 nm
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In some viruses, the flow of genetic information is from RNA to DNA. These viruses are:
| 1. | Reverse transcriptases | 2. | Reoviruses |
| 3. | Ribozymes | 4. | Retroviruses |
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What is added to the 5’ end of hnRNA in Eukaryotes?
| 1. | Poly A tail |
| 2. | Methyl cytosine triphosphate |
| 3. | Methyl guanosine triphosphate |
| 4. | Poly U tail |
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Identify the incorrectly matched pair:
| Organism | Length of DNA | |
| 1. | Bacteriophage ϕ 174 | 5386 base pairs |
| 2. | Bacteriophage Lambda | 48502 base pairs |
| 3. | Escherichia coli | 4 X 106 base pairs |
| 4. | Human beings | 3.3 X 109 base pairs |
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The process of RNA splicing shows the dominance of:
| 1. | DNA world | 2. | RNA world |
| 3. | Protein world | 4. | Microbial world |
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At which position in the ribose is an additional –OH present [with respect to Deoxyribose]?
| 1. | 1’ | 2. | 2’ |
| 3. | 3’ | 4. | 5’ |
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Watson and Crick based their model of DNA on X-ray diffraction data produced by:
| 1. | Hershey and Chase | 2. | Marie Curie and Pierre Curie |
| 3. | Franklin and Wilkins | 4. | Meselson and Stahl |
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In a transcription unit, with respect to structural genes, the promoter is located:
| 1. | Upstream and 5’ | 2. | Upstream and 3’ |
| 3. | Downstream and 5’ | 3. | Downstream and 3’ |
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