Which one is absent in viruses

Options

A. Replication
B. Mutation
C. Protein synthesis
D. Energy liberation.

Answer

To determine which process is absent in viruses, we can analyze the options provided: replication, mutation, protein synthesis, and energy liberation.

**Step 1: Understanding Viruses**
- Viruses are obligate parasites, meaning they cannot reproduce or carry out metabolic processes without a host cell. They rely on the host's cellular machinery to perform essential functions.

**Step 2: Analyzing Each Option**
- **Replication**: Viruses can replicate by hijacking the host cell's machinery to make copies of their genetic material. Therefore, replication is present in viruses.

- **Mutation**: Viruses can undergo mutations as they replicate, leading to variations in their genetic material. Hence, mutation is also present in viruses.

- **Protein Synthesis**: Viruses do not have the machinery to synthesize proteins on their own. However, they can use the host cell's ribosomes and other components to synthesize viral proteins once they have entered the host. Thus, protein synthesis is present in viruses.

- **Energy Liberation**: Viruses do not have the capability to generate or liberate energy. They do not possess metabolic pathways or organelles necessary for energy production. Therefore, energy liberation is absent in viruses.

**Step 3: Conclusion**
Based on the analysis, the process that is absent in viruses is **energy liberation**.

**Final Answer**: Energy liberation is absent in viruses.

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