Question

Replication origins typically consist of a small stretch of DNA that is relatively easy to open. Which statement is true?

A) Replication origins are rich in A and T nucleotides.
B) Replication origins are rich in G and C nucleotides.
C) Replication origins have equal numbers of A, C, G, and T nucleotides.

Answer 1

The correct statement is A) Replication origins are rich in A and T nucleotides.

Step-by-step explanation:

The correct statement is A) Replication origins are rich in A and T nucleotides. Replication origins are specific nucleotide sequences where DNA replication begins. In the case of prokaryotes like E. coli, the origin of replication is approximately 245 base pairs long and is rich in adenine-thymine (AT) sequences. These AT-rich sequences help to facilitate the opening of the DNA double helix during replication.