The Following Figure Shows the First Cycle in Polymerase Chain

question 84

Multiple Choice

The following figure shows the first cycle in polymerase chain reaction (PCR) . What is the role of the structure marked "P" in this figure?

• A) The "P" represents the heat-tolerant DNA polymerase used in PCR to copy the gene of interest.
• B) The "P" represents a sequence of DNA complementary to parts of the gene being amplified that allows DNA polymerase to attach to the gene.
• C) The "P" indicates where on the DNA that DNA polymerase should terminate replication.
• D) The "P" indicates the location of the promoter for the gene being amplified.

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