Both strach and protein are digested by

Options

A. Saliva
B. Pancreatic juice
C. Gastric juice
D. Bile

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which substance digests both starch and protein.

2. **Review the Options**: The options provided are:
- A) Saliva
- B) Pancreatic Juice
- C) Gastric Juice
- D) Bile Juice

3. **Analyze Each Option**:
- **Saliva**: Saliva contains the enzyme amylase, which is responsible for the digestion of starch. It does not digest protein. Therefore, this option is incorrect.
- **Pancreatic Juice**: This juice is produced by the pancreas and contains multiple enzymes, including amylase (for starch digestion) and proteases like trypsin and chymotrypsin (for protein digestion). This option is likely correct.
- **Gastric Juice**: Gastric juice contains hydrochloric acid and pepsin, which digests some proteins. However, it does not digest starch. Therefore, this option is incorrect.
- **Bile Juice**: Bile is produced by the liver and aids in the emulsification of fats but does not digest starch or protein. Thus, this option is also incorrect.

4. **Conclusion**: Since pancreatic juice is the only option that digests both starch and protein, the correct answer is **B) Pancreatic Juice**.

5. **Final Answer**: The substance that digests both starch and protein is **Pancreatic Juice**.

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