After PCR of 25 cycles the amount of amplification product obtained is...
Given information:
- PCR was carried out for 25 cycles.
- The amount of amplification product obtained after 25 cycles is 12 units.
To find:
- The expected amount of amplification product formed after 23 cycles.
Solution:
The amount of amplification product formed after each cycle of PCR is expected to double. So, after 25 cycles, the amount of amplification product obtained is 12 units.
Calculating the initial amount of amplification product:
To find the initial amount of amplification product, we need to calculate the amount of amplification product formed after the first cycle.
Let's assume the initial amount of amplification product (after 0 cycles) is X units.
- After 1 cycle, the amount of amplification product formed is 2X units.
- After 2 cycles, the amount of amplification product formed is 4X units.
- After 3 cycles, the amount of amplification product formed is 8X units.
- After 4 cycles, the amount of amplification product formed is 16X units.
Calculating the amount of amplification product formed after 23 cycles:
- After 4 cycles, the amount of amplification product formed is 16X units.
- After 5 cycles, the amount of amplification product formed is 32X units.
- After 6 cycles, the amount of amplification product formed is 64X units.
- ...
- After 23 cycles, the amount of amplification product formed is (2^19)X units.
Using the given information:
- After 25 cycles, the amount of amplification product obtained is 12 units.
- We can calculate the value of X using the equation (2^19)X = 12.
Calculating X:
(2^19)X = 12
X = 12 / (2^19)
Calculating the amount of amplification product after 23 cycles:
After 23 cycles, the amount of amplification product formed is (2^19)X units.
= (2^19) * (12 / (2^19))
= 12 units
Hence, the expected amount of amplification product formed after 23 cycles is 3 units.