NEET 2012 Biology question

Which statement is wrong for viruses ?

(1)Antibiotics have no effect on them
(2)All are parasites
(3)All of them have helical symmetryCorrect
(4)They have ability to synthesize nucleic acids and proteins

Answer: (3)

Solution

Viruses are obligate intracellular parasites, inert outside a host cell and unaffected by antibiotics (which act on bacterial structures and enzymes), so statements (1) and (2) are correct. Inside the host cell the viral genome directs the synthesis of viral nucleic acid and proteins using the host machinery

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Question ID VK-091194