The given diagram illustrates three cycles of polymerase chain reaction.How many copies of double stranded DNA will be formed after performing the 6th cycle?
Correct answer: C. 64
- A. 16
- B. 32
- C. 64
- D. 128
Explanation
The polymerase chain reaction (PCR) is a process that amplifies DNA, doubling the number of molecules with each cycle. Starting with one double-stranded DNA, the first cycle produces 2 copies, the second cycle produces 4, the third produces 8, and so on. Therefore, after the 6th cycle, the number of double-stranded DNA molecules is 2^6 = 64. Option C is correct because it correctly represents this exponential growth.Option A (16) and Option B (32) underestimate the number of cycles, while Option D (128) overestimates it as it assumes an additional cycle.
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