Retroviruses and Retrovirus-Like Elements Share All of the Following Genes

Question

Retroviruses and retrovirus-like elements share all of the following genes except
A) Gag.
B) Pol.
C) Env.
D) Gag and Pol.
E) Pol and Env.

Accepted Answer

Retrovirus-like elements lack the Env gene, which is necessary for the formation of the viral envelope and is present in true retroviruses.