Biochemistry – MCQ 59 – Sigma subunit of prokaryotic RNA polymerase

The sigma subunit of prokaryotic RNA polymerase:
A. Binds the antibiotic rifampicin
B. Is inhibited by tx-amanitin
C. Specifically recognizes the promoter site
D. ls part of the core enzyme

Correct answer : C. Specifically recognizes the promoter site

Sigma subunit is responsible for recognition of promoter sites in the DNA.

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