Which statement is wrong for viruses?

Explanation

"All are parasites": This statement is correct. Viruses are obligate intracellular parasites, meaning they depend on a host cell to replicate and reproduce. "All of them have helical symmetry": This statement is incorrect. Viruses can have different symmetries, including helical, icosahedral, or complex structures. The structure of a virus depends on its type and can vary. "They don't have the ability to synthesize nucleic acids and proteins": This statement is correct. Viruses do not have the cellular machinery to synthesize nucleic acids and proteins on their own. They must rely on the host cell's machinery to replicate and produce their genetic material and proteins. "Antibiotics have no effect on them": This statement is correct. Antibiotics are generally ineffective against viruses. Antibiotics target bacteria and not viruses because viruses lack the cellular structures and metabolic processes that antibiotics are designed to disrupt. So, in summary, the incorrect statements is the second.