Question

Which mechanism is NOT how RNA polymerase finds a promoter?

A. Sliding along double-stranded DNA molecule back and forth
B. Transferring off and onto the same DNA molecule in close vicinity
C. Sliding on a single-stranded noncoding DNA molecule
D. Transferring between distant DNA segments located on the same molecule

Answer 1

The mechanism NOT used by RNA polymerase to find a promoter is transferring between distant DNA segments on the same molecule.

Step-by-step explanation:

RNA polymerase finds a promoter through several mechanisms, but the one that is NOT how it finds a promoter is transferring between distant DNA segments located on the same molecule. The correct mechanisms through which RNA polymerase finds a promoter are:

1. Sliding along double-stranded DNA molecule back and forth: RNA polymerase can slide along the DNA molecule and scan for the specific promoter sequence.
2. Transferring off and onto the same DNA molecule in close vicinity: RNA polymerase can move on and off the DNA molecule in close proximity to the promoter region.
3. Sliding on a single-stranded noncoding DNA molecule: RNA polymerase can slide along a single-stranded noncoding DNA molecule and locate the promoter sequence.