Question

which statement about dna replication is true?

prokaryotes can only replicate their single circular chromosome in the nucleus.
eukaryotes can only replicate one segment of a chromosome at a time.
prokaryotes only have one origin of replication to initiate replication.
eukaryotes only have one circular chromosome that unwinds at multiple locations.

Explanation:

Analyze prokaryotic cellular structure and replication site

Prokaryotes lack a nucleus; their DNA replication occurs in the cytoplasm. Therefore, the statement that prokaryotes replicate in the nucleus is false.

Analyze eukaryotic replication origins and chromosome structure

Eukaryotes have multiple linear chromosomes and initiate replication at multiple origins simultaneously, not just one segment at a time. Eukaryotes do not have a single circular chromosome.

Analyze prokaryotic replication initiation

Prokaryotes typically possess a single, circular chromosome with a single origin of replication (oriC) where DNA replication is initiated.

Answer:

• (A) Prokaryotes can only replicate their single circular chromosome in the nucleus.
• (B) Eukaryotes can only replicate one segment of a chromosome at a time.
• (C) Prokaryotes only have one origin of replication to initiate replication. (Correct answer)
• (D) Eukaryotes only have one circular chromosome that unwinds at multiple locations.