Arrange these respiratory substrates used in aerobic respiration in increase order of their respiratory quotients.

Options

A. Protein - Triplamitin - Oxalic acid - Glucose
B. Protein - Triplamitin - Glucose -Oxalic acid
C. Triplamitin -Protein -Oxalic acid - Glucose
D. Triplamitin -Protein -Glucose- Oxalic acid

Answer

To solve the question of arranging respiratory substrates used in aerobic respiration in increasing order of their respiratory quotients (RQ), we will follow these steps:

### Step 1: Understand the Concept of Respiratory Quotient (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. It can be expressed mathematically as:
\[ RQ = \frac{CO2 \, \text{produced}}{O2 \, \text{consumed}} \]

### Step 2: Identify the Respiratory Substrates and Their RQ Values
We need to identify the RQ values for the given respiratory substrates:
1. **Glucose**: RQ = 1.0
2. **Proteins**: RQ = 0.8
3. **Tripalmitin (a type of fat)**: RQ = 0.7
4. **Oxalic Acid**: RQ = 4.0

### Step 3: Arrange the RQ Values in Increasing Order
Now that we have the RQ values, we can arrange them in increasing order:
- Tripalmitin: RQ = 0.7
- Proteins: RQ = 0.8
- Glucose: RQ = 1.0
- Oxalic Acid: RQ = 4.0

### Step 4: Write the Final Arrangement
Based on the RQ values, the increasing order of respiratory substrates is:
1. Tripalmitin (0.7)
2. Proteins (0.8)
3. Glucose (1.0)
4. Oxalic Acid (4.0)

### Step 5: Conclusion
Thus, the correct arrangement of the respiratory substrates in increasing order of their respiratory quotients is:
**Tripalmitin < Proteins < Glucose < Oxalic Acid**