Q. No.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 × 106 base pairs |
| 4. | Human beings | 3.3 × 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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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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DNA-dependent RNA polymerase catalyzes polymerization in:
| 1. | Only in 3’ – 5’ direction |
| 2. | Only in 5’ – 3’ direction |
| 3. | In both directions |
| 4. | In neither directions |
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Frederick Griffith discovered:
| 1. | DNA is the genetic material |
| 2. | RNA can be the genetic material |
| 3. | Streptococcus has two strains |
| 4. | Bacterial transformation |
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