Digestion of which component of food will be affected if the pH of stomach is made 7?

Options

A. (a) Fat
B. (b) Protein
C. (c) Sucrose
D. (d) Vitamins

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which component of food digestion would be affected if the pH of the stomach is changed to 7, which is neutral.

2. **Identifying the Components**: The options provided are:
- A) Fat
- B) Protein
- C) Sucrose
- D) Vitamins

3. **Role of pH in Digestion**: The stomach normally has a highly acidic environment (pH around 1.8 to 2) due to the secretion of hydrochloric acid. This acidic environment is crucial for the activation of digestive enzymes.

4. **Focus on Protein Digestion**: The digestion of proteins in the stomach is primarily initiated by the enzyme pepsin. Pepsin is secreted in an inactive form called pepsinogen, which gets activated to pepsin in the acidic environment.

5. **Effect of Neutral pH**: If the pH of the stomach is changed to 7 (neutral), the pepsinogen would not be activated into pepsin because it requires an acidic pH for activation. Without the active pepsin, protein digestion cannot occur.

6. **Conclusion**: Since the activation of pepsinogen to pepsin is inhibited at a neutral pH, the digestion of proteins would be significantly affected. Therefore, the correct answer is option B, proteins.

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