Question

Arrange the events taking place during transcription in order:

i) The pre-RNA undergoes processing ii) RNA polymerase moves downstream, unwinding the DNA
iii) RNA polymerase binds to the promoter
iv) RNA transcript is released and polymerase detaches from the DNA
v) Polymerase initiates RNA synthesis at the start point on the template strand

A. iii, v, ii, iv, i
B. v, ii, i, iii, iv
C. iv, iii, ii, i, v
D. i, iii, v, ii, iv

Answer 1

The accurate sequence for the steps of transcription is RNA polymerase binds to the promoter, polymerase initiates RNA synthesis, polymerase unwinds the DNA and moves downstream, RNA transcript is released, and lastly, the pre-RNA is processed. The answer is option A.

Step-by-step explanation:

The correct order of events taking place during transcription is as follows:

1. RNA polymerase binds to the promoter (Initiation).
2. Polymerase initiates RNA synthesis at the start point on the template strand.
3. RNA polymerase moves downstream, unwinding the DNA (Elongation).
4. RNA transcript is released and polymerase detaches from the DNA (Termination).
5. The pre-RNA undergoes processing before exiting the nucleus.

The correct sequence from the given options is iii, v, ii, iv, i.