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Question

During DNA replication, the strand that is formed continuously is called the ______ strand, while the strand formed discontinuously as fragments is the _______ strand.

A
Leading, lagging
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B
Continuous, discontinuous
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C
Lagging, leading
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D
Leading, Okazaki
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Solution

The correct option is A Leading, lagging
Among the two newly formed strands of DNA, one is formed continuously in the 5’ 3’ direction. This is called the leading strand. The other strand which is formed discontinuously as short fragments, is known as the lagging strand. The names obviously indicate that there is slight delay in synthesising the lagging strand compared to the leading strand.

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