Proteins- Fibrous

Question 1

Properties

Answer 1

• Long-stranded
• Insoluble

Question 2

Examples

Answer 2

• Keratin
• Collagen
• Elastin

Question 3

Collagen

Answer 3

• Structural component in teeth, tendons and blood vessel walls
• Made up of 3 polypeptide chains

Question 4

Keratin

Answer 4

• Found in hair, nails and skin
• Contains a large amount of cysteine, which allows disulphide bonds to form creating a strong and insoluble molecule

Question 5

Elastin

Answer 5

• Found in blood vessel walls
• Allows tissues to expand and return to regular shape