Session 5-Amino Acids Flashcards
1
Q
How many different AA are there?
A
20
2
Q
What are the two main groups of AAs?
A
Non-polar and hydrophobic vs polar and hydrophilic
3
Q
Which two groups are non-polar and hydrophobic?
A
Alkyl and aromatic AAs
4
Q
Which three groups are polar and hydrophilic?
A
Neutral
Acidic
Basic
5
Q
Which elements are AAs made of? (5)
A
Carbon Oxygen Nitrogen Hydrogen Sulphur
6
Q
What is an AA residue?
A
What remains of an AA after it is joined by a peptide bond to form a protein
7
Q
What happens when pH < pK?
A
Group will be protonated (H+ added)
8
Q
What happens when pH > pK?
A
The group will be deprotonated (H+ removed)
9
Q
What is physiological pH?
A
7.4
10
Q
What four things is the central carbon atom of an AA covalently bonded to?
A
Amino group (-NH2) Carboxyl group (-COOH) Hydrogen atom (-H) Distinctive R group (side chain)
