Unit 6 Transcription 2/11/2025

Question 1

What are the 3 parts of transcription?

Answer 1

Initiation, elongation, termination

Question 2

What’s initation?

Answer 2

The RNAP binds to the promoter and opens up the DNA strand

Question 3

What’s elongation?

Answer 3

The RNAP moves along the template strand making RNA along the DNA in by adding RNA nucleotides the 5’-3’ direction, and moving in the 3’-5’ direction. While moving, it zips up ten DNA behind it it already used

Question 5

What’s termination?

Answer 5

When the RNAP reaches the end of the strand it leaves the strand and the newly made pre-mRNA also leaves

Question 6

What happens after termination?

Answer 6

The pre-mRNA has its introns taken out, and gains a methyl cap and poly-A tail

Question 7

Why does pre-mRNA have its introns taken out?

Answer 7

They do not contain genetic information

Question 8

Why does pre-mRNA gain a methyl cap?

Answer 8

So it can create a nuclear pore and leave the nucleus

Question 9

Why does pre-mRNA gain a poly-A tail?

Answer 9

So exonuclease targets that instead of the genetic information of the mRNA (conserves the genetic information)

Question 10

What codon does pre-mRNA start with?

Answer 10

AUG