Biology A-Level
Keratin
What Keratin means in Biology A-Level, as defined for OCR.
Definition of Keratin
Check what you remember
Read the wording for your board, then hide it and explain Keratin in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Contains many cysteine residues forming disulfide bridges, giving hardness and waterproofing in hair, nails and skin.
Topics that use Keratin
- Biological molecules (OCR A-Level)
Related terms
- amylose and amylopectin
- Benedict's test for reducing and non-reducing sugars
- Biuret test for proteins
- Bonding and R-group interactions
- Carbon, hydrogen and oxygen
- Cellulose and microfibrils
- Cholesterol
- Cohesion and surface tension
Using Keratin in the exam
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