Sigma Subunit helps in specific initiating by Decreasing the affinity of RNA polymerase for general regions of DNA by a factor of 104

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Free Online Mock Biotechnology Multiple Choice Test on biosynthesis-of-proteins

Sub Category : biosynthesis-of-proteins	Test : 2	Time Left :
1.In prokaryotic RNA polymerase the smallest subunit is
(1) alpha (2) beta (3) beta dash (4) sigma
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2.Sigma Subunit helps in specific initiating by
(1) recognizing initiation codon (2) Decreasing the affinity of RNA polymerase for general regions of DNA by a factor of 104 (3) It helps RNA polymerase bind to DNA template (4) helps in phosphodiester bond formation
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3.For circular DNA, negative supercoiling favours transcription because
(1) It helps RNA polymerase installation easy (2) Sliding of RNA polymerase is facilitated (3) It facilitates unwinding (4) All of the above
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4.Fidelity of transcription as compared to translatiuon is?
(1) lower (2) higher (3) Equal (4) Depends on the pH of the nucleoplasm
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5.The weakest base pairs are?
(1) rC - rG r = RNA (2) rC - dG d = DNA (3) rU - dA base pairs (4) dU - rA

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Free Online Mock Biotechnology Multiple Choice Test on biosynthesis-of-proteins