How many copies of DNA sample are poduced in PCR technique after 6-cycle

Options

A. 4
B. 32
C. 64
D. 16

Answer

To determine how many copies of a DNA sample are produced in the PCR (Polymerase Chain Reaction) technique after 6 cycles, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding PCR Basics**: PCR is a technique used to amplify a specific segment of DNA. Each cycle of PCR doubles the amount of DNA present.

2. **Initial DNA Copy**: We start with 1 copy of the DNA segment.

3. **Doubling Each Cycle**: After each cycle, the number of DNA copies doubles. This can be represented mathematically as:
- After 1 cycle: \( 2^1 = 2 \) copies
- After 2 cycles: \( 2^2 = 4 \) copies
- After 3 cycles: \( 2^3 = 8 \) copies
- After 4 cycles: \( 2^4 = 16 \) copies
- After 5 cycles: \( 2^5 = 32 \) copies
- After 6 cycles: \( 2^6 = 64 \) copies

4. **Final Calculation**: After 6 cycles, the total number of copies produced is \( 2^6 \), which equals 64.

5. **Conclusion**: Therefore, after 6 cycles of PCR, 64 copies of the DNA sample are produced.

### Final Answer:
The number of DNA copies produced after 6 cycles of PCR is **64**.

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