Which PCR step synthesizes complementary DNA strands?
A. Cool DNA to between 50°C and 65°C.
B. Add primers.
C. Repeat the cycle of heating and cooling.
D. Add DNA polymerase and nucleotides at 72°C.
E. Heat target DNA to 94°C.
Answer: D
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Which of the following is NOT an example of
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A. a fish B. an earthworm C. a mammal D. an insect E. a snake