Question

what is the name of the enzyme that builds cdna out of mrna?
a) rna polymerase
b) dna polymerase
c) dna helicase
d) reverse transcriptase

Explanation:

Reverse transcriptase is an enzyme that catalyzes the synthesis of cDNA (complementary DNA) from an mRNA (messenger RNA) template. RNA polymerase synthesizes RNA from a DNA template, DNA polymerase synthesizes DNA from a DNA template during replication, and DNA helicase unwinds the DNA double - helix.

Answer:

D. Reverse transcriptase