A <em>prokaryotic cell </em>is the one that does not have any membrane bound organelles, nucleus bound DNA and is a simpler organism. Example bacteria.
An<em> eukaryotic cell is</em> the one which has all the membrane bound organelles present in it. Also, the DNA is bound by the nucleus. E.g. Animal and plant cell.
<em>Virus</em> is an organism, which is considered to be non living outside the host and it uses the host's machinery to survive.
Please see the attached diagram for the Venn diagram.