summary of haemoglobin
globular protein
quaternary structure
consists of 4 haem groups which can bind to oxygen
consists 4 polypeptide chains two alpha and two beta chains.
they carry oxygen from lungs to tissues
they are soluble in water which makes it good for transport in blood.
summary of cellulose
polysaccharide
consists of beta glucose subunits held by glycosidic bonds.
unbranched cellulose chains
chains held together by hydrogen bonds which make is strong
forms cell walls in plants
insoluble