The Semiconservative Nature of DNA Replication

In DNA replication, the resulting daughter molecules contain one strand of the original parental DNA and one new strand. What is the explanation for this phenomenon?A) DNA replication is semiconservative.B) DNA replication is conservative. C) DNA replication is not conservative. D) RNA synthesis is conservative.

The correct explanation for the phenomenon is A) DNA replication is semiconservative

The correct explanation for the phenomenon is A) DNA replication is semiconservative.

DNA replication is a process by which a double-stranded DNA molecule is copied to produce two identical daughter molecules. During replication, the two strands of the parental DNA molecule separate, and each strand acts as a template for the synthesis of a new complementary DNA strand. This process results in two daughter DNA molecules, each consisting of one strand from the parent DNA molecule and one newly synthesized strand.

The term “semiconservative” describes this process accurately. The presence of one strand from the parent DNA and one newly synthesized strand in each daughter molecule represents a conservative aspect as it ensures the preservation of the original genetic information. At the same time, the presence of a newly synthesized strand brings an element of novelty and variability, allowing for genetic diversity and adaptation to occur.

The theory of DNA replication being semiconservative was proposed by James Watson and Francis Crick in 1953, based on their interpretation of the experimental evidence available at the time. This theory has been further supported and confirmed by numerous subsequent studies and experiments.

In conclusion, DNA replication is a semiconservative process, wherein the resulting daughter DNA molecules contain one strand from the parental DNA and one newly synthesized strand.

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