Which of the following best describes the origin of replication in DNA replication?

• A. A protein that stabilizes the unwound DNA strands
• B. A specific sequence of nucleotides where replication begins
• C. The site where DNA polymerase adds nucleotides
• D. The enzyme that unwinds the DNA double helix

Answer: (B)

Verified step by step guidance

1. Understand that DNA replication is the process by which a cell duplicates its DNA before cell division.
2. Recognize that the origin of replication is a specific location on the DNA molecule where replication begins.
3. Identify that this location is characterized by a specific sequence of nucleotides, which is recognized by the replication machinery.
4. Note that proteins involved in replication, such as helicase, bind to this origin to initiate the unwinding of the DNA double helix.
5. Clarify that the origin of replication is not a protein or enzyme, but rather a sequence of nucleotides that signals the start of replication.