Which one does not take part in breakdown of starch?
(a) Invertase
(b) Lipase
(c) Amylase
(d) Diastase

Options

A. Invertase
B. Lipase
C. Amylase
D. Diastase

Answer

To determine which enzyme does not take part in the breakdown of starch, we will analyze each of the given options.

1. **Understanding Starch**: Starch is a complex polysaccharide made up of glucose units. The breakdown of starch involves converting it into simpler sugars.

2. **Analyzing Each Option**:
- **(a) Invertase**: Invertase is an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose. It is not directly involved in the breakdown of starch.
- **(b) Lipase**: Lipase is an enzyme that breaks down lipids (fats) into fatty acids and glycerol. It does not participate in starch breakdown.
- **(c) Amylase**: Amylase is a key enzyme that breaks down starch into maltose and other sugars. Therefore, it is involved in starch breakdown.
- **(d) Diastase**: Diastase is a term often used to refer to a group of enzymes, including amylase, that help in the breakdown of starch into simpler sugars like maltose.

3. **Conclusion**: Based on the analysis, both invertase and lipase do not participate in the breakdown of starch. However, since lipase specifically breaks down lipids, it is the most appropriate answer as it is entirely unrelated to starch. Therefore, the correct answer is **(b) Lipase**.

### Final Answer:
(b) Lipase