Leading and Lagging

Question 1

Does DNA have a direction?

Answer 1

DNA has a direction, meaning that bases are added from one end of the chain (moves in 1 direction), because it’s 1 direction it causes problems

Question 2

SKETCH the leading and lagging strand!

Answer 2

111

Question 3

Leading and Lagging step 4

Answer 3

Primase synthesises RNA primer for 5th Okazaki fragment.

Question 4

Leading and lagging step 5

Answer 4

DNA poll iii completes synthesis for fragment 4. After reaching the RNA primer, DNA pol iii detaches and begins to add nucleotides to the 3’ end of the fragment 5 primer in the replication fork.

Question 5

Leading and lagging step 6

Answer 5

DNA pol i removes the primer from the 5’ end of fragment 2 replacing it with nucleotides added one by one to the 3’ end of fragment 3. After addition, free 3’ end

Question 6

Leading and lagging step 7

Answer 6

DNA ligase joins the 3’ end of fragment 2 to the 5’ end of fragment 1.