DECK 3 Flashcards
1
Q
What happens if we dissolve an amino acid in water?
A
Zwitterion form in aqueous solution
1
Q
what happens if we add a strong acid like HCI?
A
it turns into a positive ion
2
Q
what happens if we add a strong base such as NaOh?
A
it turns into negative ion
3
Q
Proteins behave as _______
A
Zwitterions
4
Q
when a protein is at its isoelectric point, the protein has _________
A
no net charge
5
Q
pH above its pI ( more basic ) = ?
A
net negative charge
6
Q
pH below pI (more acidic ) = ?
A
net positive charge
7
Q
Proteins are least soluble in water at their _________
A
isoelectric points
8
Q
Proteins can be precipitated from solution when _____
A
pH=pI
9
Q
Which amino acid has aromatic rings on their side chains
A
- Phenylalanine
- Tryptophan
- Tyrosine
