Question

WORTH 25 POINTS !

Question 2 of 10
The model represents DNA replication.
DODH
Structure 1
RNA primer
Structure 2
Enzyme 1
Which statement best describes structure 1?
Enzyme 2
Original DNA
A. It is the lagging strand because it uses RNA primers.
B. It is the lagging strand because it is behind enzyme 1.
OC. It is the leading strand because it is being built continuously.
D. It is the leading strand because it is being built in the 3' to 5
direction.

Answer 1

Structure 1 in the context of DNA replication is best described as the leading strand, synthesized continuously in the 5' to 3' direction, requiring only a single RNA primer for its elongation.

Step-by-step explanation:

The correct answer to the question 'Which statement best describes structure 1?' given the context of DNA replication is 'It is the leading strand because it is being built continuously.' This description fits the leading strand which is synthesized continuously in the 5' → 3' direction, unlike the lagging strand which is created discontinuously in segments called Okazaki fragments and requires a new RNA primer for each fragment. The leading strand only requires a single RNA primer to initiate synthesis by DNA polymerase, and the enzyme adds nucleotides in the direction of the replication fork, proceeding in a continuous fashion.

Answer 2

A

Step-by-step explanation:

It is the lagging strand because it uses RNA primers.