Which of the following substrate is not correctly matched with its end products?

Options

A. Nucleic acids `to` Sugars and bases
B. Proteins `to` Amino acids
C. Fats `to` Monoglycerides
D. Polysaccharides `to` Monosaccharides

Answer

To solve the question, we need to analyze each substrate and its corresponding end products to determine which one is not correctly matched.

### Step-by-Step Solution:

1. **Identify the Substrates and Their Products:**
- We have four substrates to consider: nucleic acids, proteins, fats, and polysaccharides.

2. **Analyze Nucleic Acids:**
- **Substrate:** Nucleic acids
- **End Products:** Nucleotides (sugar, bases, phosphate)
- **Analysis:** Nucleic acids are indeed broken down into nucleotides, which consist of sugar, bases, and phosphate groups. This match is correct.

3. **Analyze Proteins:**
- **Substrate:** Proteins
- **End Products:** Amino acids
- **Analysis:** Proteins are polymers made up of amino acids. They are broken down by proteolytic enzymes into amino acids. This match is also correct.

4. **Analyze Fats:**
- **Substrate:** Fats
- **End Products:** Mono-glycerides
- **Analysis:** Fats are digested by lipases. The process first produces diglycerides, which are then further broken down into mono-glycerides. Therefore, stating that fats directly yield mono-glycerides is incorrect. This match is wrong.

5. **Analyze Polysaccharides:**
- **Substrate:** Polysaccharides
- **End Products:** Mono-saccharides
- **Analysis:** Polysaccharides are indeed broken down into mono-saccharides, which are their monomer units. This match is correct.

6. **Conclusion:**
- The only substrate that is not correctly matched with its end product is **fats**, as they do not directly yield mono-glycerides but rather first produce diglycerides.

### Final Answer:
The substrate that is not correctly matched with its end products is **fats** (as they yield diglycerides first, not directly mono-glycerides).

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