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Cloning Vectors - Medical Science

Q1:

Maximum size of foreign DNA that can be inserted into a replacement vector is

A 25-30 kb

B 18-20 kb

C 20-25 kb

D 40-50 kb

ANS:C - 20-25 kb

For replacement vector, it is possible to clone foreign DNA up to 23 kb in length, hence given answer is correct.