Proteins Flashcards
What is a protein ?
Polymers made up of one or more chain of amino acids
Approximately how many different amino acids are they ?
20
What’s a polypeptide?
Many amino acids linked together by a condensation reaction
What’s the primary structure of a protein ?
Sequence of amino acids in a polypeptide chain
What is the secondary structure of a protein ?
Folding of the polypeptide chain allowing the formation of many weak hydrogen bonds
What are the two secondary structures a protein ?
Alpha helix
Beta pleated sheet
What is the tertiary structure of a protein ?
Further folding where the whole chain folds into a specific shape
What bonds are in the tertiary structure ?
Ionic bond
Hydrogen bonds
Disulfide bridges
Hydrophobic interactions
What’s the quaternary structure of a protein ?
Proteins made of more than one polypeptide chain e.g haemoglobin
What are the four molecular structures of a protein
Bowling stick model
Space filling model
Backbone model
Ribbon model
What two molecular shapes can a protein be ?
Fibrous or globular
