DNA replicates by which of the following models?

• A. Fragmentation model
• B. Dispersive model
• C. Conservative model
• D. Semiconservative model

Answer: (D)

Verified step by step guidance

1. Understand the context: DNA replication is the process by which a DNA molecule makes a copy of itself. This is crucial for cell division and the inheritance of genetic material.
2. Learn about the models: There are several proposed models for DNA replication, including the conservative, dispersive, and semiconservative models.
3. Conservative model: In this model, the original DNA molecule remains intact, and a completely new copy is made. This means the parental DNA is conserved in its entirety.
4. Dispersive model: This model suggests that the original DNA strands are broken into pieces, and new DNA is synthesized in short segments. The resulting DNA molecules are a mix of old and new DNA.
5. Semiconservative model: In this model, each of the two strands of the original DNA molecule serves as a template for a new strand. The result is two DNA molecules, each with one old strand and one new strand. This is the correct model for DNA replication.