Question

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Explain how PCR (polymerase chain reaction) can be used to detect very low amount of DNA in a sample?

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Answer 1

Answer:

Using PCR, copies of very small amounts of DNA sequences are exponentially amplified in a series of cycles of temperature changes. ... The two DNA strands then become templates for DNA polymerase to enzymatically assemble a new DNA strand from free nucleotides, the building blocks of DNA.

Explanation:

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Answer 2

The PCR helps to detect the low amount of DNA by amplifying that piece of DNA to form many copies. The amplified DNA can be then easily detected by using other testing procedures. This technique is used to detect infection at the early stage by amplifying the DNA of microbe

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