Which one is not a correct definition? a.Enveloped viruses are more sensitive to environmental conditions b. Viral nucleic acid is always surrounded by capsid c. Viruses'genetic material can be either DNA or RNA d. An enveloped virus have more advantages then naked viruses

The correct answer is:<br /><br />a. Enveloped viruses are more sensitive to environmental conditions<br /><br />Explanation:<br /><br />a. Enveloped viruses are generally less sensitive to environmental conditions compared to naked (non-enveloped) viruses. The lipid envelope of enveloped viruses provides additional protection against environmental factors such as desiccation, heat, and detergents.<br /><br />b. Viral nucleic acid is always surrounded by a protein capsid, which is the protein shell that encases the viral genetic material.<br /><br />c. Viruses can have either DNA or RNA as their genetic material, but not both.<br /><br />d. Enveloped viruses often have certain advantages over naked viruses, such as the ability to fuse with host cell membranes and the potential for receptor-mediated entry into host cells.<br /><br />Therefore, option a is the incorrect definition among the given choices.