Question

The air cell, also known as air pocket, is the empty space formed at the large end of the egg. It holds _________.

• A. Oxygen
• B. Water
• C. Yolk
• D. Chalazae

Hint:

Egg freshness test: Larger air cell = older egg. Air cell always forms at the broad end.

Answer 1

The Correct Option is A

Concept: The air cell in an egg is a small pocket of air that forms at the broader (large) end of the egg between the inner and outer shell membranes. It is formed as the egg cools after being laid and contents contract, creating a vacuum that draws in air.

Step 1: Formation of air cell.
After the egg is laid:
• The egg is initially warm
• As it cools, internal contents contract
• A small vacuum is created
• Air enters through pores in the shell This leads to the formation of the air cell.

Step 2: Composition of air cell.
The air cell contains atmospheric gases, primarily:
• Oxygen
• Small amounts of nitrogen and carbon dioxide

Step 3: Evaluating options.
• Option (A): Oxygen — Correct, as air cell contains air rich in oxygen.
• Option (B): Water — Incorrect, water is present in albumen.
• Option (C): Yolk — Found in the center of the egg.
• Option (D): Chalazae — Rope-like structures anchoring yolk, not in air cell.

Step 4: Importance of air cell.

• Indicates freshness of egg (larger air cell = older egg)
• Provides oxygen to embryo during incubation Final Conclusion:
The air cell holds air, primarily oxygen. Hence, the correct answer is option (1).