Question

The yolk membrane, which surrounds the yolk is also referred as _____.

• A. Edwards membrane
• B. Vitelline membrane
• C. Edwin membrane
• D. Lawrence membrane

Hint:

The strength and elasticity of the vitelline membrane are key indicators of egg freshness.
In fresh eggs, the vitelline membrane is taut, keeping the yolk round and upright.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
An avian egg is a highly structured biological system composed of the shell, egg white (albumen), and egg yolk.
Each component is separated by specific membranes to maintain structural integrity and prevent microbial invasion.

Step 2: Detailed Explation:
The egg yolk is situated at the center of the egg and is enclosed by a clear, elastic boundary called the vitelline membrane.
This membrane separates the liquid yolk from the surrounding liquid albumen.
Chemically, the vitelline membrane is composed of multiple fibrous protein layers, primarily containing collagen and glycoproteins like mucin.
It plays an essential role in preserving yolk structure.
As an egg ages, the vitelline membrane absorbs water from the albumen, causing it to weaken and stretch.
This is why the yolk of an older egg breaks more easily when the egg is cracked.
The terms Edwards, Edwin, and Lawrence membranes do not exist in avian egg atomy.

Step 3: Fil Answer:
The correct option is (B).