<prompt> An enzyme that makes a double stranded DNA copy from a single stranded RNA template molecule is known asDNA polymeraseRNA polymeraseReverse transcriptasePhosphokinase  <response>: Reverse transcriptase is an RNA dependent DNA polymerase that produces ds DNA from RNA template. It moves along the template in 3 5 direction, synthesizing DNA is 5 3 direction.It is seen in retro viruses e.g. HIV. 