RQ is more than one if respiratory substrate is :

Options

A. Tripalmitin
B. Glucose
C. `beta`-Globulin
D. Succinic acid

Answer

To determine which respiratory substrate results in a respiratory quotient (RQ) greater than one, we need to understand the concept of RQ and how it relates to different substrates.

### Step-by-Step Solution:

1. **Understand RQ**:
- The respiratory quotient (RQ) is defined as the ratio of the volume of carbon dioxide (CO2) produced to the volume of oxygen (O2) consumed during respiration.
- Mathematically, it is expressed as:
\[ RQ = \frac{CO2 \text{ produced}}{O2 \text{ consumed}} \]

2. **Identify the RQ Values for Different Substrates**:
- Different substrates yield different RQ values based on their chemical composition and the amount of oxygen required for their complete oxidation.
- Common substrates and their RQ values:
- **Glucose**: RQ = 1 (C6H12O6 + 6O2 → 6CO2 + 6H2O)
- **Fatty acids**: RQ < 1 (more oxygen is consumed than CO2 produced)
- **Proteins**: RQ varies, generally around 0.8
- **Organic acids**: RQ can be greater than 1.

3. **Analyze the Given Substrates**:
- The question lists the following substrates:
- Methane
- Glucose
- Beta-globulin
- Succinic acid
- Among these, we need to identify which one has an RQ greater than 1.

4. **Determine the RQ for Each Substrate**:
- **Methane**: RQ is typically less than 1.
- **Glucose**: RQ = 1.
- **Beta-globulin**: RQ can vary but is generally around 0.8.
- **Succinic acid**: RQ is slightly more than 1 when it is broken down under aerobic conditions.

5. **Conclusion**:
- The respiratory substrate that results in an RQ greater than one is **succinic acid**.

### Final Answer:
RQ is more than one if the respiratory substrate is **succinic acid**.

---