How are viruses different from bacteria?  a. Viruses lack enzymes for protein synthesis b. Viruses need host cells to survive  c. Viruses are obligate intracellular parasites  d. All viruses are smaller than bacteria  e. Viruses contain DNA or mRNA but neither both

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Viral Replication

The virus is acellular and considered non-living outside the host cell. The replication of the virus occurs only inside the living cells. Only a few genes are present in the smallest virus, whereas many genes are present in the largest virus. These genes encode specific viral proteins.