PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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(3.2) Which of the following statements describes each new molecule of DNA produced when DNA replicates?
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Each new molecule is half the length of the original molecule.
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Each new molecule has only the coding portions of the original molecule in its sequence.
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Each new molecule contains one strand from the original molecule and one newly synthesized strand.
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Each new molecule retains the A, C, and G bases in the DNA sequence but replaces the T base with U.
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Explanation:
Detailed explanation-1: -This continuously synthesized strand is known as the leading strand. Because DNA polymerase can only synthesize DNA in a 5′ to 3′ direction, the other new strand is put together in short pieces called Okazaki fragments. The Okazaki fragments each require a primer made of RNA to start the synthesis.
Detailed explanation-2: -The replication process Each strand of DNA acts as a template for synthesis of a new, complementary strand. Replication produces two identical DNA double helices, each with one new and one old strand.
There is 1 question to complete.