Which statement is wrong for viruses

Options

A. All are parasites
B. All of them have helicl symmetry
C. They have ability of synthesize nucleic acids and proteins
D. Antibiotics have no effect on them

Answer

**Step-by-Step Solution:**

1. **Understanding Viruses:**
- Viruses are considered obligate parasites, meaning they can only reproduce inside a host cell. Outside a living organism, they are classified as non-living.

2. **Types of Symmetry in Viruses:**
- Viruses exhibit different types of symmetry:
- **Icosahedral (Cubical) Symmetry:** This includes both naked and enveloped viruses.
- **Helical Symmetry:** This also includes naked and enveloped forms.
- **Complex Symmetry:** This type varies in structure and does not fit into the other categories.

3. **Evaluating the Statements:**
- The first statement about viruses being obligate parasites is correct.
- The second statement claims that all viruses have helical symmetry, which is incorrect because viruses can have icosahedral and complex symmetries as well.
- The third statement about viruses having the ability to synthesize nucleic acids and proteins using the host cell machinery is correct.
- The fourth statement about antibiotics having no effect on viruses is also correct, as antibiotics target bacteria, not viruses.

4. **Identifying the Wrong Statement:**
- The only incorrect statement is the one that claims all viruses have helical symmetry, making it the wrong option.

**Final Answer:**
The wrong statement about viruses is that "all of them have a helical symmetry."

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