DNA replication is said to be semiconservative. Which of the following statements correctly explains what this means?

Question

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One of the two resulting double helices is made of two old strands, and the other is made of two new strands.
Half of the old strand is degraded and half is used as a template for the replication of a new strand.
Each new double helix consists of one old and one new strand.
The old double helix is degraded and half of its nucleotides are used in the construction of two new double helices.
One strand of the new double helix is made of DNA and the other strand is made of RNA.

Answer 1

The correct statement that explains what semiconservative DNA replication means is:

Each new double helix consists of one old and one new strand.

In semiconservative replication, each of the two resulting DNA molecules contains one original (old) strand and one newly synthesized strand.