Alternate oxidase is a/an enzyme connected with

Options

A. pentose phosphate shuttle
B. cyanide resistant
C. photorespiration
D. all of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Alternate Oxidase**: Begin by recognizing what alternate oxidase is. It is an enzyme that plays a role in the respiratory process of plants, specifically in the mitochondrial electron transport chain.

2. **Identifying the Function**: Note that alternate oxidase is classified as a non-energy conserving terminal oxidase. This means that it does not contribute to the production of ATP (adenosine triphosphate) like other oxidases.

3. **Evaluating the Options**:
- **Option 1: Pentose Phosphate Shuttle**: This option is incorrect. The pentose phosphate pathway is involved in carbohydrate metabolism and does not directly relate to alternate oxidase.
- **Option 2: Cyanide Resistant**: This option is correct. Alternate oxidase is known for its resistance to cyanide, a common respiratory inhibitor. This characteristic allows it to continue functioning even in the presence of cyanide, which would inhibit other pathways.
- **Option 3: (Not specified in the transcript)**: Without specific information, we can assume this option is also incorrect based on the context provided.
- **Option 4: All of the above**: This option is incorrect as not all previous statements are true.

4. **Conclusion**: Based on the evaluation of the options, the correct answer is **Option 2: Cyanide Resistant**.

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