Find out the correct sequence of substrate enzyme and Product?

Options

A. (a) Small intestine : ` " Proteins "overset(" Pepsin ")rarr "Amino acids " `
B. (b) Stomach : ` " Fats "overset(" lipase ")rarr " micelles " `
C. (c) Duodenum : `"Triglycerides "overset(" trypsin")rarr " monoglycerides "`
D. (d) Small intestine: ` " Starch "overset( alpha-"amylase")rarr " maltose " `

Answer

To find the correct sequence of substrate, enzyme, and product, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Components**: We need to identify the substrate (the substance being acted upon), the enzyme (the catalyst that facilitates the reaction), and the product (the result of the reaction).

2. **Evaluate Option A**:
- **Substrate**: Protein
- **Enzyme**: Pepsin
- **Product**: Amino acid
- **Analysis**: Pepsin acts on proteins, but it does not directly convert them into amino acids. Instead, it breaks them down into smaller peptides (peptones). Therefore, this option is incorrect.

3. **Evaluate Option B**:
- **Substrate**: Fats
- **Enzyme**: Bile salts
- **Product**: Emulsified fat
- **Analysis**: While bile salts do emulsify fats, the enzyme that breaks down emulsified fats is lipase, which converts them into glycerol and fatty acids, not just emulsified fat. This option is also incorrect.

4. **Evaluate Option C**:
- **Substrate**: Triglyceride
- **Enzyme**: Trypsin
- **Product**: Monoglyceride
- **Analysis**: Trypsin is not the enzyme that acts on triglycerides; lipase is the correct enzyme. Additionally, triglycerides are broken down into glycerol and fatty acids, not monoglycerides. This option is incorrect.

5. **Evaluate Option D**:
- **Substrate**: Starch
- **Enzyme**: Alpha amylase
- **Product**: Maltose
- **Analysis**: This sequence is correct. Alpha amylase acts on starch in the small intestine and breaks it down into maltose, a disaccharide. Therefore, this option is correct.

### Conclusion:
The correct sequence of substrate, enzyme, and product is:
- **Substrate**: Starch
- **Enzyme**: Alpha amylase
- **Product**: Maltose

Thus, the correct option is **D**.

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