R.Q. for tripalmatin as respiratory substrate is

Options

A. 0.7
B. 1
C. 0.9
D. `oo`

Answer

To determine the respiratory quotient (R.Q.) for tripalmitin as a respiratory substrate, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of R.Q.**:
- The respiratory quotient (R.Q.) is defined as the ratio of carbon dioxide produced to oxygen consumed during respiration. It varies depending on the type of substrate being metabolized.

2. **Identify the Type of Substrate**:
- Tripalmitin is a type of fat (specifically a triglyceride) composed of three palmitic acid molecules. Fats generally have a different R.Q. compared to carbohydrates and proteins.

3. **Know the General R.Q. Values**:
- The R.Q. for carbohydrates is approximately 1, while for proteins, it is around 0.8. For fats, the R.Q. is typically less than 1.

4. **Determine the R.Q. for Tripalmitin**:
- The specific R.Q. value for tripalmitin is known to be approximately 0.7. This indicates that for every molecule of oxygen consumed, less carbon dioxide is produced compared to carbohydrates.

5. **Select the Correct Answer**:
- Given the options (0.7, 1, 0.9, infinity), the correct R.Q. for tripalmitin is **0.7**.

### Final Answer:
The R.Q. for tripalmitin as a respiratory substrate is **0.7**.

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