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Who made the discovery that one DNA strand is synthesized discontinuously in fragments?

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Who made the discovery that one DNA strand is synthesized discontinuously in fragments?

(a) Francis Crick

(b) Reiji Okazaki

(c) James Watson

(d) Louis Pasteur

The question was asked in an internship interview.

My question is from DNA Replication in portion DNA Replication and Repair, Cellular Reproduction of Cell Biology

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Right option is (b) Reiji Okazaki

The explanation: Reiji Okazaki of Nagoya University, Japan; made the discovery that one of the strands during DNA replication is synthesized discontinuously (termed the lagging strand) in short fragments – Okazaki fragments.

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