Question

how many molecules of dna would result from one molecule after four cycles of pcr?
a. 2
b. 4
c. 32
d. 16

Explanation:

Step1: Recall PCR formula

The number of DNA molecules after $n$ cycles of PCR starting from 1 molecule is given by $2^n$.

Step2: Substitute $n = 4$

We substitute $n = 4$ into the formula $2^n$, so we have $2^4$.

Step3: Calculate $2^4$

$2^4=2\times2\times2\times2 = 16$.

Answer:

D. 16