proteins

Cards (15)

what do proteins form and their examples
immunoproteins (immunoglobulins)
transport proteins (haemoglobin)
structural proteins (keratin)
contractile proteins (myosin)
how many amino acids are commonly found in polypeptides in living organisms
20
structure of an amino acid
A) amino group
B) r-group
C) carboxyl group
how do you form a dipeptide
A) amino acid
B)
C) peptide bond
D) dipeptide
what are non-essential amino acids
amino acids our body can synthesise
what are essential amino acids
amino acids our body cannot synthesise
what are polypeptides
long chains of amino acids bonded by peptide bonds
what are the roles of proteins
catalyst, blood clotting, transporting, cell adhesion, cell receptor
what is insulin  
a hormone produced and secreted by β-cells in the pancreas
what is a property of insulin
composed of 2 polypeptide chains
what is collagen
a fibrous protein made of three separate polypeptide chains
what are the properties of collagen
most abundant in the human body, reduces brittleness of teeth and bones
what is denaturation
the irreversible change of protein conformation
where can denaturing be observed
changes in an egg white as it is fried
what does heating an egg white do to the egg
causes the hydrophobic amino acids to appear at the edges, causing the protein to become insoluble
a harder layer forms as the cooked egg white