A-level Proteins

Most questions are protein names, some are structures. Write answers in the box next to each one.

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Last updated: January 5, 2021

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Hint	Answer
Globular protein with haem prosthetic group	Haemoglobin
Structure of a protein that describes the specific order of amino acids	Primary
Salivary/pancreatic enzyme with globular structure	Amylase
Fibrous quaternary protein with triple helix coil that provides mechanical strength	Collagen
Structure of a protein that describes folding of the chain and the formation of H-bonds	Secondary
Fibrous protein found in teeth and hair with many cysteine amino acids	Keratin
Insulin is a soluble protein. True or false.	True
Substance transported by binding to haemoglobin in erythrocytes	Oxygen

Hint	Answer
Structure of a protein that determines its final shape involving many types of bond.	Tertiary
Name given to proteins with multiple subunit polypeptide chains.	Quaternary
Keratin is soluble. True or false.	False
Name given to amino acid with thiol residual group	Cysteine
Dipeptide made of two cysteine amino acids	Cystine
Word that describes amino acids as both acidic and basic	Amphoteric
Fibrous protein found in skin	Elastin

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