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解释一下“吉祥图案”？

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Replication of DNA is:

A. Conservative
B. Semiconservative
C. Nonconservative
D. None of these

In replication, after formation of replication fork:

A. Both the new strands are synthesized discontinuously
B. One strand is synthesized continuously and the other discontinuously
C. Both the new strands are synthesized continuously
D. RNA primer is required only for the synthesis of one new strand

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Direction of new DNA strand synthesis is:

A. 5′ → 3′
B. 3′ → 5′
C. Both (a) and (b)
D. None of these

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All of the following enzymes are required for the synthesis of DNA except:

A. DNA-dependent DNA polymerase
B. Helicase
C. DNA ligase
DNA-dependent RNA polymerase

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