Select the correct statements

Options

A. Tryosinogen `to^(Chymotryp sin)` Trypsin
B. Procarboxy peptidase `to^(pep sin)` carboxypeptidase
C. Proamylase `to^(ptyl i n)` Amylase
D. Pepsinogen `to^(HCI)` Pepsin

Answer

To solve the question of selecting the correct statements regarding digestion and enzyme activation, we can analyze each statement provided. Here’s a step-by-step breakdown:

### Step 1: Analyze the First Statement
**Statement:** Trypsinogen is converted to active trypsin with the help of chymotrypsin.

**Analysis:** This statement is incorrect. Trypsinogen is converted to active trypsin by the enzyme enterokinase (also known as enteropeptidase), not chymotrypsin. Chymotrypsin itself is activated from chymotrypsinogen by trypsin.

**Conclusion:** This statement is incorrect.

### Step 2: Analyze the Second Statement
**Statement:** Procarboxypeptidase is converted into pepsin.

**Analysis:** This statement is also incorrect. Procarboxypeptidase is an inactive enzyme that is activated to carboxypeptidase by trypsin. Pepsin is a different enzyme that is activated from pepsinogen by hydrochloric acid (HCl) in the stomach.

**Conclusion:** This statement is incorrect.

### Step 3: Analyze the Third Statement
**Statement:** Proamylase conversion of Tylenol into amylase.

**Analysis:** This statement is incorrect. Proamylase refers to pancreatic amylase, and Tylenol is not related to amylase. Salivary amylase (also known as ptyalin) is already an active enzyme and does not require activation from Tylenol.

**Conclusion:** This statement is incorrect.

### Step 4: Analyze the Fourth Statement
**Statement:** The conversion of pepsinogen into pepsin occurs due to HCl.

**Analysis:** This statement is correct. Pepsinogen is an inactive precursor (zymogen) secreted by the stomach lining. When it comes in contact with hydrochloric acid (HCl), it is converted into the active enzyme pepsin, which is responsible for protein digestion.

**Conclusion:** This statement is correct.

### Final Summary of Statements
- **First Statement:** Incorrect
- **Second Statement:** Incorrect
- **Third Statement:** Incorrect
- **Fourth Statement:** Correct

### Final Answer
The only correct statement is the fourth one: "The conversion of pepsinogen into pepsin occurs due to HCl."

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