Question

Which of these is true for gastric juices?

• A. Kill bacteria
• B. Digest food
• C. Include hydrochloric acid
• D. All of these

Hint:

Functions of gastric juice:
Provides acidic medium
Kills harmful microbes
Begins protein digestion Remember HCl + pepsin = effective stomach digestion.

Answer 1

The Correct Option is D

Step 1: Understand what gastric juice is. Gastric juice is a digestive fluid secreted by the gastric glands in the stomach.
Step 2: Identify the components of gastric juice. Gastric juice contains:
Hydrochloric acid (HCl) — creates acidic medium and kills bacteria.
Pepsin enzyme — digests proteins.
Mucus — protects the stomach lining.
Step 3: Verify each statement.
Kill bacteria — True, due to presence of HCl.
Digest food — True, enzymes like pepsin digest proteins.
Include hydrochloric acid — True.
Step 4: Draw conclusion. Since all the given statements are correct,
Hence, the correct answer is \[ \boxed{\text{All of these}} \]