Which one is the major ingredient of leather?

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Which one is the major ingredient of leather? Answer: Collagen

The major ingredient of leather is collagen, a fibrous protein found in animal hides. Collagen is the main component of animal skin, and the tanning process chemically alters it to make it durable and resistant to decay, creating leather.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.