What is absent in viruses

Options

A. DNA
B. RNA
C. Proteins and enzymes
D. Cytoplasm & membranes

Answer

### Step-by-Step Solution:

1. **Understanding Viruses**:
- Viruses are classified as small obligate intracellular parasites. This means they cannot reproduce or carry out metabolic processes outside of a host cell.

2. **Components of Viruses**:
- Viruses contain either a DNA or RNA genome. This genetic material is essential for their replication and infection process.
- They are surrounded by a protein coat known as a capsid, which protects the viral genome.

3. **Absence of Cellular Structures**:
- Unlike living cells, viruses do not possess cellular structures. Specifically, they lack cytoplasm and cell membranes, which are fundamental components of living cells.

4. **Conclusion**:
- Therefore, the key components that are absent in viruses are cytoplasm and cell membranes.

### Final Answer:
Viruses do not have cytoplasm and cell membranes.

---