Which of the following enzymes coverts proteins into peptones?

Options

A. Ptyalin
B. Pepsin
C. Insulin
D. None of these

Answer

To solve the question "Which of the following enzymes converts proteins into peptones?", we can follow these steps:

### Step 1: Understand the Question
The question asks which enzyme is responsible for converting proteins into peptones. Peptones are smaller peptides that result from the breakdown of proteins during digestion.

### Step 2: Identify the Enzymes Listed
The options provided are:
- A) Ptyalin
- B) Pepsin
- C) Insulin
- D) None of these

### Step 3: Analyze Each Option
- **A) Ptyalin**: This enzyme is primarily involved in the digestion of carbohydrates (specifically starch) and does not play a role in protein digestion. Therefore, this option is incorrect.

- **B) Pepsin**: Pepsin is a well-known enzyme that is secreted in the stomach and is responsible for breaking down proteins into smaller peptides and peptones. This is a crucial step in protein digestion, making this option a strong candidate for the correct answer.

- **C) Insulin**: Insulin is a hormone that regulates blood glucose levels and does not have any role in protein digestion. This option is also incorrect.

- **D) None of these**: Since we have identified Pepsin as a valid option, this choice is not applicable.

### Step 4: Conclusion
After analyzing the options, we conclude that the enzyme that converts proteins into peptones is **B) Pepsin**.

### Final Answer
The correct answer is **B) Pepsin**.

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