The Synthesis of DNA in Living Systems Occurs in the 5′-To-3′

question 60

Essay

The synthesis of DNA in living systems occurs in the 5′-to-3′ direction.However, scientists synthesize short DNA sequences needed for their experiments on an instrument dedicated to this task.
A.The chemical synthesis of DNA by this instrument proceeds in the 3′-to-5′ direction.Draw a diagram to show how this is possible and explain the process.
B.Although 3′-to-5′ synthesis of DNA is chemically possible, it does not occur in living systems.Why not?

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