AP Biologyeasymcq1 pt
What does PCR (polymerase chain reaction) do?
A.Amplifies a specific DNA segment exponentially
B.Separates proteins by size
C.Sequences an entire genome
D.Cuts DNA at specific palindromes
Explanation
Core Concept
Repeated heating/cooling cycles with primers and heat-stable Taq polymerase double the target DNA each round — millions of copies from a trace sample.
Correct Answer
AAmplifies a specific DNA segment exponentially
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