Biotechnology

AP Biology· difficulty 4/5

Starting from one DNA molecule, after 25 PCR cycles the theoretical maximum number of double-stranded copies is

  • A

    2241.7×1072^{24} \approx 1.7 \times 10^7

  • B

    25×2=5025 \times 2 = 50

  • C

    2253.4×1072^{25} \approx 3.4 \times 10^7

    check_circle
  • D

    252=62525^2 = 625

Explanation

Each cycle doubles DNA: N=N0cdot2nN = N_0 \\cdot 2^n. Starting at 1 with 25 cycles → 2²⁵ ≈ 33.5 million. (Real-world plateau is lower due to enzyme/primer limits.)

Want 10 more like this — adaptive to your weak spots?

Related questions

AP Biology · Biotechnology Practice Question | Acemy