Q. Which cation is placed in the catalytic subunit of RNA polymerase?

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Q. While studying the transcripts in vitro you observe that other than the longer transcripts there are some short stretches of RNA oligomer produced as well. You repeat the experiment several times but these oligomers seem to persist. What is the possible explanation?

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Q. Capping of RNA is necessary as_______

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Q. What is the 1st nucleotide of a completely synthesized transcript?

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Q. Processivity of RNA polymerase is ________

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Q. Which antibiotic inhibits transcription elongation?

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Q. You design a reconstructive RNA polymerase where you take the beta and alpha subunit from a rifampicin resistant strain and beta prime and sigma subunit from rifampicin sensitive strain. You check the rate of transcription by this RNA polymerase after the addition of the antibiotic. What will be your observation?

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Q. You add labeled Uridine analogue to the mixture of DNA and RNA pol in vitro. What are you trying to determine?

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Q. Which of these is not a part of RNA polymerase elongation machinery?

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Q. Melting of DNA would lead to _________________

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Q. In a stretch of DNA being transcribed, the region forward to the Elongation is __________

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Q. What form of helix would you expect to see in double stranded RNA?

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Q. A ssRNA shows inverted tandem repeat. What would be its secondary structure?

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Q. To study the functioning of intrinsic terminator you increase the number of G-C base pairs in the stem and decrease the U bases from the tail region. What would be its effect on termination?

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Q. Which of these interactions is the weakest?

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Q. You modify your gene DNA sequence by introducing an attenuator within the transcribed region. You isolate the labeled gene product and perform SDS PAGE. You observe two bands one higher and another slightly lower. Which of this band corresponds to properly modified sequence?

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Q. Rho protein, that is necessary for transcription termination, is a ________

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Q. Rho shows base preference although it doesn’t have any concensus cis binding sequence. Which region will be expected to bind Rho better?

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Q. Rho dependent termination mechanism doesn’t reguire____________

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Q. When Rho catches up with RNA polymerase it _______

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