A daughter DNA molecule is composed of one original strand and one new strand because DNA replication is __________ .

검증된 단계별 안내

Understand the nature of DNA replication: DNA replication is the process by which a cell duplicates its DNA before cell division.

Recall the three models of DNA replication: conservative, semiconservative, and dispersive.

Identify that in the semiconservative model, each daughter DNA molecule consists of one original (parental) strand and one newly synthesized strand.

Recognize that this model was confirmed by the Meselson-Stahl experiment, which demonstrated the semiconservative nature of DNA replication.

Conclude that the blank in the sentence should be filled with 'semiconservative' to accurately describe the composition of daughter DNA molecules.

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주요 개념

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Semiconservative DNA Replication

DNA replication is semiconservative, meaning each new DNA molecule consists of one original (parental) strand and one newly synthesized strand. This mechanism ensures genetic continuity by preserving half of the original DNA in each daughter molecule.

DNA Strand Complementarity

During replication, each original DNA strand serves as a template for the formation of a complementary new strand. Base pairing rules (A with T, and G with C) guide the addition of nucleotides, ensuring accurate copying of genetic information.

Role of DNA Polymerase

DNA polymerase is the enzyme responsible for synthesizing the new DNA strand by adding nucleotides complementary to the template strand. It also proofreads the new strand to minimize errors during replication.