Question:
In which of the following, Keratin, a fibrous protein is absent?
In which of the following, Keratin, a fibrous protein is absent?
Show Hint
Keratin occurs in hair, nails, horns, and wool, while muscles mainly contain actin and myosin proteins.
Updated On: Jun 25, 2026
- Hair
- Muscles
- Silk
- Wool
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The Correct Option is B
Solution and Explanation
Step 1: Understand keratin protein.
Keratin is a fibrous structural protein found in protective tissues of animals.
It provides strength and toughness.
Step 2: Identify where keratin is present.
Keratin is present in: Hair Wool These structures mainly consist of keratin fibers.
Step 3: Analyze silk and muscles.
Silk contains the fibrous protein: Fibroin Muscles mainly contain: Actin and Myosin Thus, keratin is absent in muscles.
Step 4: Final conclusion.
Hence, keratin is absent in \[ \boxed{\text{Muscles}} \]
Keratin is a fibrous structural protein found in protective tissues of animals.
It provides strength and toughness.
Step 2: Identify where keratin is present.
Keratin is present in: Hair Wool These structures mainly consist of keratin fibers.
Step 3: Analyze silk and muscles.
Silk contains the fibrous protein: Fibroin Muscles mainly contain: Actin and Myosin Thus, keratin is absent in muscles.
Step 4: Final conclusion.
Hence, keratin is absent in \[ \boxed{\text{Muscles}} \]
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