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Q. Okazaki fragments are formed during

J & K CETJ & K CET 2012Molecular Basis of Inheritance

Solution:

DNA replication takes place during $S$-phase of interphase. Replication of $ 3\to 5 $ strand of a DNA molecule proceeds continuously its complementary strand therefore it produce leading strand, while the $ 5\to 3 $ strand proceeds discontinuousiy its complementary strand and called lagging strand. The small fragments in lagging strands are called Okazaki fragments.