Question

If only one DNA molecule is subjected to PCR and the time required for each cycle is three minutes, then after five cycles, how many DNA molecules are obtained?

Options

• 10

• 15

• 32

• 64

Answer 1

32

Explanation:

PCR doubles the DNA in each cycle.

So, after n cycles, the number of DNA molecules = 2ⁿ

Here, 2⁵ = 32 DNA molecules