DNA transcription - protein synthesis

Question 1

Transcription involves (4):

Answer 1

template strand

synthesis in a 5’-3’ direction

complementary base pairs

RNA polymerase

Question 2

The 3 stages of DNA transcription are:

Answer 2

Initiation, elongation, termination

Question 3

What happens in initiation?

Answer 3

1) RNA polymerase binds to promoter regions in DNA to initiate transcription

RNA polymerase works with a co-factor, the complex is called the transcription complex.

The complex works to separate double stranded DNA so there is a template strand.

Question 4

What happens in elongation?

Answer 4

1) RNA polymerase hydrolyses hydrogen bonds in DNA locally, (few at a time) separating the strands

2) RNA complementary bases (free floating in the cytoplasm) are added to the 3’ of the RNA strand.

Uracil replaces thymine