Proteins Flashcards
what are proteins made out of? think of its monomers
amino acids
what is the bond between a.a.
peptide bonds
peptide bond polar or nonpolar?
polar
what are proteins composed of? think func groups and what atoms they have
central Cee atom bonded covalently w 4 other func. groups
a) carboxyl
b) amino
c) hydrogen
d) remaining
what food is tryptophan found?
turkey
+2 a.a. linked together forms a ______?
peptide
what does a polypeptide have?
a chain of a.a.
bonded by peptide bonds
name 6 functions of proteins?
1) structure/support in hair, nails and skin
2) hormones
3) motion for muscle contractions
4) transport hemoglobin
5) antibodies
6) enzymes
how many lvls of structure do proteins have?
4
what geometry does a primary structure in proteins take?
linear polymer
what process do a.a. form to make a polypeptide?
dehydration synthesis
what geometry does a secondary structure in proteinss take?
alpha helix or beta pleated sheet
why are beta pleated sheets kinked?
from the hydrogen bonds between a.a.
what is an ex of a secondary protein?
keratin
are tertiary structures 3D or 2D
3D shape formed by twisting and folding
why are tertiary structures 3D?
hydrogen bonds between —R groups, ionic and covalent
ex of covalent bonding?
disulfide bridge between cysteine a.a.
ex of tertiary proteins?
enzymes, globular proteins
what is a quaternary structure composed of?
2 or more polypeptides
ex of quat, structure?
hemoglobin
what does the final shape of a protein determine?
its function
what is denaturation
when PROTEINS (ONLY) are exposed to extreme heat/pH change and undergoes irreversible change
what happens in denaturation?
H bonds between structures are broken and the protein can no longer perform the OG function
