5.3- Transcription

Question 1

What is the purpose of transcription?

Answer 1

transcription takes DNA and makes a corresponding strand of RNA

Question 2

What is the first step of transcription?

Answer 2

Initiation

Question 3

What happens in the initiation step?

Answer 3

transcription factors bond to the promoter or the enhancer site and prepares the RNA polymerase to start copying gene

Question 4

What is the second step of transcription?

Answer 4

elongation

Question 5

What happens in elongation?

Answer 5

RNA polymerase frees itself. A 5’ protective cap is added. RNA polymerase copies DNA. Other protons splice out introns.

Question 6

What is the third step of transcription?

Answer 6

termination

Question 7

What happens in termination?

Answer 7

at the polyadenylation site , the termination sequence is recognized. A polyA tail is added to the end of the new RNA strand

Question 8

What are some similarities in DNA and RNA?

Answer 8

• C-G
• A
• Phosphate Group

Question 9

What are some differences between DNA and RNA?

Answer 9

DNA
- has ‘T’
- deoxyribose rugar
-double stranded

RNA
- has ‘u’
- ribose sugar
-single stranded