Amino Acid Side Chains

Question 0

Glutamic Acid

Answer 0

Acidic (E)

Question 1

Aspartic Acid

Answer 1

Acidic (D)

Question 2

Lysine

Answer 2

Basic, K

Question 3

Arginine

Answer 3

Basic, R (very basic because positive charge is stabilized by resonance, e.g double bond)

Question 4

Histidine

Answer 4

Basic, H, nitrogens weak affinity for H+ so only partially positive at a neutral pH

Question 5

Asparagine

Answer 5

Uncharged Polar, N

Question 6

Glutamine

Answer 6

Uncharged polar, Q

Question 7

Serine

Answer 7

Uncharged polar, S

Question 8

Threonine

Answer 8

Uncharged polar, T

Question 9

Tyrosine

Answer 9

Uncharged polar, Y, aromatic ring

Question 10

Alanine

Answer 10

Nonpolar, A

Question 11

Valine

Answer 11

Nonpolar, V

Question 12

Leucine

Answer 12

Nonpolar, L

Question 13

Isoleucine

Answer 13

Nonpolar, I

Question 14

Proline

Answer 14

Nonpolar, P

Question 15

Phenylalanine

Answer 15

Nonpolar, F, aromatic

Question 16

Methionine

Answer 16

Nonpolar, M, Sulfur in it, donates methyl

Question 17

Tryptophan

Answer 17

Non polar, aromatic ring, W

Question 18

Glycine

Answer 18

Nonpolar, smallest side chain as H, G

Question 19

Cysteine

Answer 19

polar, C, can make disulfide bonds (insulin held together by disulfide bonds)

Question 20

What are the two other amino acids?

Answer 20

Selenocysteine and Pyrrolysine