8.3 flashcards

Question 1

What is transcription?

Answer 1

making RNA from DNA code

Question 2

What does the promoter do?

Answer 2

signals transcription factors, start site

Question 3

What does the enhance/silencer do?

Answer 3

controls how much RNA is made from a gene, acts as a switchW

Question 4

What do exons do?

Answer 4

sequences will be present in mRNA

Question 5

What do introns do?

Answer 5

get spliced out

Question 6

What are the three stages of transcription?

Answer 6

initiation, elongation, termination

Question 7

What happens during initiation?

Answer 7

transcription factors bind to promoter/enhancer, RNA polymerase is prepared to being copying gene sequence into mRNA

Question 8

What happens during elongation?

Answer 8

RNA polymerase breaks free of transcriptiion factors, protective 5’ cap is added to RNA and introns are spliced out

Question 9

What happens during termination?

Answer 9

termination sequence is recognized at polyadeylation site, poly A tail is added to end of RNA molecules