Agricultural Biotechnology - Study Mode

Explanation

Solution: 1. β-keratin is tough and insoluble. - It is a fibrous structural protein found in the epidermal tissues of reptiles and birds. 2. It provides mechanical strength and water resistance. - This property makes it suitable for forming scales, feathers, and claws. 3. β-keratin differs from α-keratin. - While α-keratin is softer and more flexible, β-keratin is tougher and more rigid due to its unique structure. 4. Option C is correct as β-keratin is tough and insoluble, which aligns with its biological function.