W6C12T4.3 Transcription

Question 1

What is transcription?

Answer 1

Making complementary RNA to template DNA.

Question 2

Which enzyme carries out transcription?

Answer 2

RNA polymerase

Question 3

RNA polymerase function

Answer 3

Adds successive nucleotides to 3’ end of growing transcript

Question 4

First stage of transcription

Answer 4

Initiation

Question 5

What happens during initiation

Answer 5

DNA strands separated, transcription of template strand begins

Question 6

Second stage of transcription

Answer 6

Elongation

Question 7

What happens during elongation

Answer 7

RNA polymerase adds nucleotides to 3’ end of growing RNA transcript

Question 8

Third stage of transcription

Answer 8

Termination

Question 9

Transcription starts at a (1) and ends at a (2)

Answer 9

1. promoter
2. terminator

Question 10

Promoter also called

Answer 10

TATA box: sequence 5’-TATAAA-3’

Question 11

Mediator complex

Answer 11

Complex of proteins that recruit RNA polymerase to the promoter; before initiation of transcription

Question 12

Primary transcript

Answer 12

RNA transcript that comes off template DNA strand

Question 13

mRNA

Answer 13

Messenger RNA; combo of RNA molecule and ribosome, directs protein synthesis