Proteins Flashcards
What are proteins made up of
Amino acids
What are amino acids consisted of
Carboxyl group, R group and amino group
What are amino acids joined by
peptide bonds (condensation reactions)
What are the four structures
Primary, secondary , tertiary and quaternary
What is the primary structure
the sequence of amino acids in a protein
What is secondary structure
2D arrangement of chain of amino acids either alpha helix or b pleated sheets.
What is tertiary structure
3D folding of ionic complex shape consists of
hydrogen bonding,
ionic bonds ( salt bridges between oppositely charged groups on r group )
disulphide bridges ( covalent bonds between sulphur atoms in cysteine)
What is quaternary structure
3D arrangement of more than one polypeptide
describe fibrous and globular in terms of type of structures
little to no tertiary structure and in globular consist of all
describe how r group is portrayed in globular and fibrous
in globular the hydrophilic r groups orientate outwards meaning they’re soluble and transported in blood
in fibrous the hydrophobic r groups are on the inside so insoluble
which proteins are functional and structural
globular are functional fibrous is structural
describe the chains in fibrous
long parallel polypeptides strands they have cross links which enable tensile strength for stability.
what type of protein is collagen
a fibrous protein
why does collagen have high tensile strength
because of the presence of hydrogen boding and covalent bonding
what is collagen made up of
3 chains / polypeptides wrapped around to form an alpha triple helix which is known as collagen fibrils which makes fibres
