protein 1 Flashcards
1
Q
L-amino acid
A
digestible
2
Q
D-amino acid
A
non-digestible
3
Q
pH «_space;pKa
A
the acid or base is moslty protonated
4
Q
pH»_space; pKa
A
the acid or base is mostly deprotonated
5
Q
isoelectric point
A
the net-charge of the acidic and basic groups of an amino acid is zero
6
Q
pH = pKa
A
50% is charged
7
Q
two advantages of heating food products
A
increased flavour, improved texture
8
Q
two disadvantages
A
loos of essential amino acids, possible crosslinking
9
Q
quaternary structure, stabilized by
A
hydrophobic interactions, disulfide bonds, charge
10
Q
taste: proteins –> peptide –> amino acids
A
no taste –> bitter –> less/bitter sweet
11
Q
will it be more or less soluble when u add salt?
A
more soluble
12
Q
a / b-helix
A
secondary
13
Q
big apolor group makes a L-molecule and D molecule?
A
L: bitter, D: sweet
