28. Is there any situation in
which DNA is made based on a
RNA template? What is the
enzyme involved?

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The process in which DNA is
having as template a RNA chain is called
reverse . In cells infected
by retroviruses (RNA viruses, like the
or SARS viruses) reverse
transcription occurs and is made
from information contained in the viral
RNA.

Viral RNA within the host produces
DNA with the help of an enzyme called
transcriptase. Based on that
DNA the host cell then makes viral
proteins, new viruses are assembled
and replication occurs.