Select the WRONG statement .

Options

A. When tripalmitin is used as a substrate in respiration , the RQ is 0.7
B. The intermediate compounds which links glycolysis with Kreb's cycle is malic acid.
C. One glucose molecule yields a net gain of 36 ATP molecules during aerobic respiration .
D. One glucose molecule yields a net gain of 2 ATP molecules during fermentation .

Answer

To solve the question of selecting the wrong statement, we will analyze each statement provided in the question step by step.

### Step 1: Analyze the first statement
**Statement:** When tripalmitin is used as a substrate in respiration, the RQ is 0.7.

- **Analysis:** The respiratory quotient (RQ) is calculated as the ratio of the volume of carbon dioxide (CO2) produced to the volume of oxygen (O2) consumed during respiration. For lipids like tripalmitin, which is a triglyceride, the RQ is typically around 0.7 because they require more oxygen to oxidize compared to carbohydrates. Therefore, this statement is **correct**.

### Step 2: Analyze the second statement
**Statement:** The intermediate compound which links glycolysis with the Krebs cycle is malic acid.

- **Analysis:** Glycolysis converts glucose into pyruvic acid, which is then converted into acetyl-CoA before entering the Krebs cycle. The correct intermediates that link glycolysis and the Krebs cycle are pyruvic acid and acetyl-CoA, not malic acid. Malic acid is actually a part of the Krebs cycle itself but does not serve as the linking compound. Therefore, this statement is **incorrect**.

### Step 3: Analyze the third statement
**Statement:** One glucose molecule yields a net gain of 36 ATP molecules during aerobic respiration.

- **Analysis:** During aerobic respiration, one molecule of glucose can yield approximately 36 to 38 ATP molecules depending on the efficiency of the electron transport chain. This statement is generally accepted as correct, so it is **correct**.

### Step 4: Analyze the fourth statement
**Statement:** One glucose molecule yields a net gain of 2 ATP molecules during fermentation.

- **Analysis:** In fermentation, glucose is converted into either ethanol or lactic acid, and this process yields a net gain of 2 ATP molecules. This statement is also **correct**.

### Conclusion
After analyzing all the statements, the second statement is the only incorrect one. Therefore, the answer to the question is:

**The wrong statement is: The intermediate compound which links glycolysis with the Krebs cycle is malic acid.**

---