Apentix/AP Biology/Unit 6: Gene Expression and Regulation/Question

AP Biologyeasymcq1 pt

DNA replication is described as semiconservative because

A.each new double helix contains one original and one new strand

B.one daughter helix is entirely new

C.strands are assembled in random pieces only

D.only proteins are copied

Explanation

Core Concept

The parent strands separate and each serves as a template, so every daughter molecule conserves half the original — proven by Meselson and Stahl's density experiments.

Correct Answer

Aeach new double helix contains one original and one new strand

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