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Electrical Engineering

Which one of the following features is absent in a virus ? (1) reproduce within host cell (2) presence of cell wall (3) fully parasitic in nature (4) presence of either DNA or RNA

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Which one of the following features is absent in a virus ? (1) reproduce within host cell (2) presence of cell wall (3) fully parasitic in nature (4) presence of either DNA or RNA
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presence of cell wall 
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