Question

question 4
1 pts
the process of annealing during pcr involves forming ________ bonds between complementary pieces of dna.
nitrogen
oxygen
hydrogen
phosphate

Explanation:

PCR (Polymerase Chain Reaction) has three main steps: denaturation (separating DNA strands), annealing (primers binding to complementary DNA sequences), and extension (DNA synthesis). In the annealing step, hydrogen bonds form between complementary bases (A - T, G - C) of DNA strands (like primers and the target DNA). Nitrogen, oxygen, and phosphate are elements in DNA structure but not the type of bond formed during annealing.

Answer:

hydrogen