Class 4 - Amino Acids

Question 1

What is the amino group pka at ph 7.4?
What is the carboxyl group pka at ph 7.4

Answer 1

amino group, carboxyl group, H, side chain

Question 2

Amino acids have neg and pos groups. But then can exist as zwitterions which is the protenated amino group and deprotenated carboxyl

Answer 2

Question 3

What is the cation and anion form compared to zwitterion?

Answer 3

cation has same amino group as zwitterion (but this is protenated compared to neutral) and carboxyl is protenated (same as neutral)

anion has the deprotenated amino group compared to zwitterion (but this is same as neutral) and carboxyl is same as zwitterion (deprotenated compared to neutral)

Question 4

_____ of amino are only forms in human proteins except for glycine

Answer 4

L forms

Question 5

Glycine (gly, G)

Answer 5

nonpolar

Question 6

Alanine (ala, A)

Answer 6

nonpolar

Question 7

proline (pro, P)

Answer 7

nonpolar
3 CH2 bonded
cyclic

Question 8

Valine (val, V)

Answer 8

nonpolar
branched CH to CH3 trees
branched chain

Question 9

Leucine (leu, L)

Answer 9

nonpolar
branched chain

CH2-CH-CH3-CH3

Question 10

Isoleucine (ile, I)

Answer 10

nonpolar
branched chain

H-C-CH3
CH2
CH3

Question 11

Isoleucine (ile, I)

Answer 11

nonpolar
branched chain

H-C-CH3
CH2
CH3