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Solution


Q.

Polymerase chain reaction (PCR) amplifies DNA following the equation.                    [2025]
1 N2  
2 2n  
3 2n+1  
4 2N2  

Ans.

(2)

PCR i.e., polymerase chain reaction amplifies DNA as per the equation 2n, where ‘n’ refers to number of cycles. Thus, say, if 3 PCR cycles will run, then 23 i.e., 2 × 2 × 2 ⇒ 8 DNA fragments will be formed.