The diagram above shows a basic double helix structure of human dnawhich best describes the function of adenine, thymine, guanine, and cytosine? a: to act as the code for genetic informationb: to unwind dna strands during replicationc: to make complementary rna strandd: to read the sequence of nucleotides along dna

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors.b) transcription from the host cell rna polymerase introduces numerous mutations.c) capsid proteins from the host cell can replace the viral capsid.d) viral rna is translated by host cell ribosomes.