The point at which the duplicated strands of DNA are attached is called what?

The point at which the duplicated strands of DNA are attached is called what?

• A. Centromere
• B. Chromatid
• C. Chromosome
• D. Nucleolus

Answer: (A)

The point where the two identical copies of a chromosome remain joined is the centromere. After DNA is replicated, the two sister chromatids stay attached at this constricted region, which serves as the attachment site for the machinery that pulls them apart during cell division. The centromere helps keep the chromatids aligned and ensures they separate correctly when the time comes. A chromatid is one copy, a chromosome refers to the entire replicated structure (two chromatids held together), and the nucleolus is a separate nuclear region involved in ribosome production.

The point where the two identical copies of a chromosome remain joined is the centromere. After DNA is replicated, the two sister chromatids stay attached at this constricted region, which serves as the attachment site for the machinery that pulls them apart during cell division. The centromere helps keep the chromatids aligned and ensures they separate correctly when the time comes. A chromatid is one copy, a chromosome refers to the entire replicated structure (two chromatids held together), and the nucleolus is a separate nuclear region involved in ribosome production.