B.
Viruses are classified as biological agents instead of a living things, $& they are only made of genetic material.
ATP is primarily produced in the Mitochondria.
C. Cells
Cells make up organs, which make up organisms, which make up populations
Answer: The process associated with RNA polymerase is to unwind the DNA and build a strand of mRNA by placing on the growing mRNA molecule the base complementary to that on the template strand of the DNA. In the mRNA, Uracil is substituted for thymine as the base complementary to adenine.
Explanation: