| Read the following statements and choose the correct option. |
| I. RNA polymerase associates transiently with 'Rho' factor to initiate transcription. |
| II. In bacteria, transcription and translation place in the same compartment. |
| III. RNA polymerase I is responsible for transcription of t RNA. |
| IV. When hnRNA undergoes capping process, adenylate residues are added at 3'-end in a template independent manner. |
| V. hnRNA is the precursor of m RNA. |
A) Only I
B) II, III and IV
C) III and IV
D) I and V
Correct Answer: D
Solution :
[d] Out of the statements given, I and V are the correct options, remaining three are wrong. These can be corrected as in bacteria, transcription and translation do not take place in same compartments they are instead coupled in the cytosol itself as there is no separation of nucleus and cytosol in bacteria therefore, translation starts much before the mRNA is fully transcribed. RNA polymerase-I is responsible for the transcription of hnRNA (not tRNA). When hnRNA undergoes capping process, methyl guanosine triphosphate are added at 5' end in a template independent manner.
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