I. Acetic acid can form cholesterol
II. Anabolic pathway is endergonic while catabolic pathway is exergonic
III. All biomolecules have a turn over i.e. they are constantly being changed into some other biomolecules and also made from other biomolecules.
IV. Flow of metabolites through metabolic pathway has a definite rate and direction. It is called dynamic state of body constituents

Options

A. All are correct
B. All are wrong
C. I and II are correct
D. Only IV is correct

Answer

To determine how many statements are correct, let's analyze each one step by step:

### Step 1: Analyze Statement I
**Statement I:** Acetic acid can form cholesterol.
- **Explanation:** Cholesterol is synthesized from acetyl-CoA, which is derived from acetic acid. Therefore, this statement is **correct**.

### Step 2: Analyze Statement II
**Statement II:** Anabolic pathway is endergonic while catabolic pathway is exergonic.
- **Explanation:** Anabolic pathways require energy (endergonic) to build complex molecules, while catabolic pathways release energy (exergonic) when breaking down molecules. This statement is also **correct**.

### Step 3: Analyze Statement III
**Statement III:** All biomolecules have a turnover, i.e., they are constantly being changed into some other biomolecules and also made from other biomolecules.
- **Explanation:** This statement is true as biomolecules are continuously synthesized and degraded in the body, indicating a dynamic turnover. Thus, this statement is **correct**.

### Step 4: Analyze Statement IV
**Statement IV:** Flow of metabolites through a metabolic pathway has a definite rate and direction. It is called the dynamic state of body constituents.
- **Explanation:** The flow of metabolites indeed has a specific rate and direction, reflecting the dynamic state of metabolism in the body. Therefore, this statement is also **correct**.

### Conclusion
All four statements are correct.

### Final Answer:
**Total Correct Statements:** 4

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