Starch degradation activity of enzyme phosphorylase increases under

Options

A. High pH
B. Low pH
C. Neutral medium
D. Not connected with pH.

Answer

**Step-by-Step Solution:**

1. **Understanding the Enzyme**: The enzyme in question is phosphorylase, which is responsible for the degradation of starch. It catalyzes the addition of inorganic phosphate to starch, resulting in the formation of glucose 1-phosphate.

2. **Identifying the Conditions for Activity**: Enzymes have optimal conditions under which they function best. These conditions can include factors such as pH, temperature, and the presence of cofactors.

3. **Analyzing pH Influence**: The question asks about the effect of pH on the activity of phosphorylase. It is known that enzymes can be sensitive to pH levels.

4. **Determining the Optimal pH for Phosphorylase**: Research indicates that phosphorylase exhibits increased activity in a high pH environment. This means that the breakdown of starch to glucose 1-phosphate is more efficient when the pH is elevated.

5. **Evaluating the Options**:
- a. High pH: This aligns with our understanding that phosphorylase activity increases.
- b. Low pH: This is generally not conducive to enzyme activity for phosphorylase.
- c. Neutral medium: While some enzymes function well at neutral pH, phosphorylase specifically benefits from a higher pH.
- d. Not connected with pH: This is incorrect as pH does influence enzyme activity.

6. **Conclusion**: Based on the analysis, the starch degradation activity of the enzyme phosphorylase increases under high pH conditions.

**Final Answer**: Option A. High pH.

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