globular proteins, insulin and lysozyme

what is insulin?

a hormone carried in the bloodstream

what bond are the two chains in insulin linked by?

disulfide bonds

what is the function of insulin?

it binds to specific receptor molecules found on the cell membrane of target cells

why are the shapes of protein hormones critical?

as they must bind to receptors to carry out their effects

where is lysosome found?

in saliva and tears

what is the function of lysosome?

to catalyse the break down of a molecule in the bacterial cell wall to defend the body against bacteria

what do enzymes including lysosome only react with?

only react with a specific substrate molecule

what chain does lysozyme consist of?

a single polypeptide chain

when the single polypeptide chain folds, what does it crate?

the active site