8.2

Question 1

Leading strand

Answer 1

The replicated strand that goes towards the replication fork. Continuous.

Question 2

Lagging strand

Answer 2

The replicated strand goes away from the replication fork. Discontinuous.

Question 3

Semi-discontinuous.

Answer 3

DNA replication is semi-discontinuous because of how the leading strand is continuous and the lagging strand is discontinuous.

Question 4

Semiconservative Replication.

Answer 4

How DNA replicates: Parent strands are inherited on first round, the next daughter strands inheriting from the first strands.

Question 5

Okazaki fragments

Answer 5

The fragmented portions that make up the lagging strand.

Question 6

Helicase

Answer 6

Unzips and unwinds the DNA

Question 7

Polymerase 3

Answer 7

Adds new nucleotides to the strands

Question 8

Polymerase 1

Answer 8

Removes RNA primers and replaces them with nucleotides.

Question 9

Ligase

Answer 9

Joins the fragmented strands of the lagging strand to make it continuous.

Question 10

Primase

Answer 10

Adds RNA primers to the strands.

Question 11

Order of events

Answer 11

Helicase > Primase > Polymerase 3 > Polymerase 1 > Ligase

Question 12

Meselson and Stahl’s experiments

Answer 12

An experiment by Meselson and Stahl in which they were trying to find how DNA replicated from one whole strand to the next. They concluded that DNA replicates semiconservatively