AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Semiconservative DNA replication results in two DNA molecules,
A
each one with two original strands
B
each one with two new strands
C
each one with one new strand and one original strand
D
one with two new strands and the other with two original strands
Explanation: 

Detailed explanation-1: -In this model, the two strands of DNA unwind from each other, and each acts as a template for synthesis of a new, complementary strand. This results in two DNA molecules with one original strand and one new strand.

Detailed explanation-2: -The result of DNA replication is two DNA molecules consisting of one new and one old chain of nucleotides. This is why DNA replication is described as semi-conservative, half of the chain is part of the original DNA molecule, half is brand new.

Detailed explanation-3: -Each new double strand consists of one parental strand and one new daughter strand. This is known as semiconservative replication.

Detailed explanation-4: -This process is known as semi-conservative replication because two copies of the original DNA molecule are produced, each copy conserving (replicating) the information from one half of the original DNA molecule. Each copy contains one original strand and one newly-synthesized strand.

Detailed explanation-5: -Semiconservative replication entails the replication of one parental strand to give its complementary strand and the replication of the other parental strand to give its complementary strand; each parental strand then stays with its newly replicated, complementary strand (6).

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