Cyanide resistant respiration is found in

Options

A. Plants
B. Bacteria
C. Viruses
D. Animals.

Answer

**Step-by-Step Solution:**

1. **Understanding Cyanide Resistant Respiration**:
- Cyanide resistant respiration refers to a type of respiration that can occur even in the presence of cyanide, a potent inhibitor of cellular respiration. This process allows certain organisms to continue producing energy despite the presence of this toxic compound.

2. **Identifying the Electron Transport Chain (ETC)**:
- The electron transport chain (ETC) is a series of protein complexes located in the inner mitochondrial membrane, where electrons are transferred through a series of reactions. This process is crucial for aerobic respiration as it generates ATP.

3. **Effects of Cyanide on Respiration**:
- Cyanide inhibits the action of cytochrome oxidase, an essential component of the ETC. This inhibition prevents the normal flow of electrons, disrupting ATP production.

4. **Organisms Capable of Cyanide Resistant Respiration**:
- While many organisms, including animals, bacteria, and plants, utilize the ETC for respiration, some have developed mechanisms to resist the effects of cyanide.

5. **Specific Example of Cyanide Resistant Respiration**:
- One notable example of a plant that exhibits cyanide resistant respiration is from the genus Spinacia, commonly known as spinach. This plant can continue its respiration process even in the presence of cyanide.

6. **Conclusion**:
- Based on the information provided, the correct answer to the question "Cyanide resistant respiration is found in" is **Option A: Plants**.