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Recombinant DNA uptake is helped by a brief heat shock at:
A82 degrees C
B12 degrees C
C62 degrees C
D42 degrees C
Answer & Solution
Correct answer: D. 42 degrees C
1. Competent cells are held on ice with the DNA.
2. They are then moved briefly to a warmer bath.
3. That heat shock is given at 42 degrees C.
_Source: NCERT Class 12 Biology, Ch 9 'Biotechnology : Principles and Processes'_
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