Question

1. ______________ binds to RNA polymerase and blocks an early step in RNA synthesis.

Ampicillin

Chloramphenicol

Rifampicin

Rimantidine

all of the above

2. Bacterial transcription machinery releases RNA strands at intrinsic and _______________ terminators.

Rho-dependent

holoenzyme

enhancer

regulatory

none of the above

3. _______________ experiments show that σ⁷⁰-RNA polymerase combines with promoter DNA to form a closed and an open complex.

Southern blotting

DNase protection

Footprinting

Complementation

none of the above

4. _______________ structures reveal important information about the way that the open complex of RNA polymerase is organized.

Crystal

Diamond

Dynamic

Antibody-antigen

none of the above