Question

which statement about dna replication is true?
a. eukaryotes can only replicate one segment of a chromosome at a time.
b. prokaryotes only have one origin of replication to initiate replication.
c. prokaryotes can only replicate their single circular chromosome in the nucleus.
d. eukaryotes only have one circular chromosome that unwinds at multiple locations.

Explanation:

• Option A: Eukaryotes have multiple origins of replication and can replicate multiple segments of chromosomes simultaneously. So this option is false.
• Option B: Prokaryotes, like bacteria, typically have a single circular chromosome with one origin of replication. This is correct as their DNA replication is initiated from this single site.
• Option C: Prokaryotes do not have a nucleus. Their DNA replication occurs in the cytoplasm. So this option is false.
• Option D: Eukaryotes have linear chromosomes (not circular). So this option is false.

Answer:

B. Prokaryotes only have one origin of replication to initiate replication.