A) Viruses are on the border line of living and non-living
B) Viruses have very few biochemical mechanisms of their own
C) Viruses have a protein coat
D) All of these
Correct Answer: B
Solution :
It is difficult to make antiviral medicines than anti-bacterial drugs. One reason is that viruses have few biochemical mechanisms of their own. They enter host's cells and use host's cell machinery for their life processes. This implies that there are relatively few virus-specific targets to aim at.
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