Starting with one double-stranded DNA molecule, how many cycles of PCR would you have to perform to produce about 100 double-stranded copies (assuming 100% efficiency per cycle)?

Question

Quizplus · Accepted Answer

Each cycle of PCR doubles the amount of DNA. So, to get 100 copies from 1 starting molecule, you would need to have 2^7 (or 128) copies after 7 cycles. Therefore, the correct answer is B) 7.

Starting with One Double-Stranded DNA Molecule, How Many Cycles of PCR