DNA replication begins at a specific site on the chromosome called the:

• A. Telomere
• B. Origin of replication
• C. Centromere
• D. Promoter

Answer: (B)

Verified step by step guidance

1. Understand that DNA replication starts at a specific location on the chromosome where the replication machinery assembles.
2. Recall the definitions of the given options: Telomere is the end of a chromosome, Centromere is the region where sister chromatids attach, and Promoter is a DNA sequence where transcription begins.
3. Identify that the site where DNA replication initiates is called the Origin of replication, a specific sequence recognized by replication proteins.
4. Recognize that the Origin of replication is distinct from other chromosome regions because it allows the DNA double helix to unwind and replication to start.
5. Conclude that the correct answer is the Origin of replication, as it is the designated starting point for DNA replication on the chromosome.