Which of the following statement is correct for virus ?

Options

A. Viruses contain either DNA or RNA
B. Viruses possess their own cell membrane
C. Viruses are facultative parasites
D. Viruses are readily killed by antibiotics

Answer

To solve the question regarding which statement is correct for viruses, we will analyze each of the provided options step by step.

### Step 1: Analyze the first option
**Statement:** "Viruses contain either DNA or RNA."
- **Explanation:** This statement is correct. Viruses can have either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) as their genetic material, but they do not have both. This characteristic is a fundamental aspect of viruses.

### Step 2: Analyze the second option
**Statement:** "Viruses possess their own cell membrane."
- **Explanation:** This statement is incorrect. Viruses do not possess their own cell membrane. Some viruses may have a lipid envelope, which is derived from the host cell's membrane, but they do not have a cellular structure like living organisms.

### Step 3: Analyze the third option
**Statement:** "Viruses are facultative parasites."
- **Explanation:** This statement is also incorrect. Viruses are obligate parasites, meaning they cannot reproduce or carry out metabolic processes without a host cell. They rely entirely on the host's cellular machinery for replication and protein synthesis.

### Step 4: Analyze the fourth option
**Statement:** "Viruses are readily killed by antibiotics."
- **Explanation:** This statement is incorrect. Antibiotics are designed to target bacterial infections and do not have any effect on viruses. Therefore, viruses are not killed by antibiotics.

### Conclusion
After analyzing all the options, the only correct statement regarding viruses is:
**Correct Answer:** "Viruses contain either DNA or RNA."

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