Amino acids

Question 1

Aliphatic amino acids

Answer 1

• Glycine (Gly, G)
• Alanine (Ala, A)
• Valine (Val, V)
• leucine (Leu, L)
• Isoleucine ( ILe, I)
• Proline (Pro, P) but contains a heterocycle making it much less hydorphobic and less aliphatic, with ristricted rotation around the N-C bond.

Question 2

Aromatic amino acids

Answer 2

• Phenyalanine (Phe, F)
• Tyrosine (Tyr, Y)
• Tryptophan (Trp, W)
• Histadine (His, H)

Question 3

Hydroxyl amino acids

Answer 3

• Tyrosine (Tyr, )
• Serine (Ser, )
• Threonine (Thr, )

Question 4

Acidic amino acids

Answer 4

• Aspartaic acid (aspartate) (Asp, D)
• Glutamic acid (glutamate) (Glu, E)

form salt bridges and polar interactions with water (h- bonding)

Question 5

Amides of amino acids

Answer 5

• Asparagine (Asn, N)
• Glutamine (Gln, Q)

non-ionisable but highly polar making them strong H-bong donor/acceptor

Question 6

Basic amino acids

Answer 6

• Lysine (Lys, K)
• Arginine (Arg, R)

Question 7

Charged amino acids

Answer 7

Arginine (R, Arg) - positive

histidine (H, His) - positive

lysine (K,Lys) - positive

aspartic acid (D, Asp) - negative

glutamic acid (E, Glu) - negative

Question 8

Hydrophobic amino acids

Answer 8

Alanine (A, Ala)

Valine (V, Val)

Isoleucine (L, ILe)

Lecuine (L, Leu)

Methionine (M, Met)

Phenylalanine (F, Phe)

Tyrosine (Y,Tyr) (MUCH LESS SO)

Trytophan (W, Trp) (MUCH LESS SO)

Question 9

Amino acids with uncharged polar side chains

Answer 9

Serine (S, Ser)

Threonine (T, Thr)

Asparagine (N, Asn)

Glutamine (Q, Gln)

Question 10

A

Answer 10

alanine (ala)

Question 11

R

Answer 11

arginine (Arg)

Question 12

N

Answer 12

Asparagine (Asn)

Question 13

D

Answer 13

aspartic acid (Asp)

Question 14

C

Answer 14

cytoseine (Cys)

Question 15

Q

Answer 15

Glutamine (Gln)

Question 16

E

Answer 16

Glutamic acid (Glu)

Question 17

G

Answer 17

Glycine (Gly)

Question 18

H

Answer 18

Histadine (His)

Question 19

I

Answer 19

Isoleucine (Ile)

Question 20

L

Answer 20

Leucine (Leu)

Question 21

K

Answer 21

Lysine (Lys)

Question 22

M

Answer 22

Methionine (Met)

Question 23

F

Answer 23

Phenyalanine (Phe)

Question 24

P

Answer 24

Proline (Pro)

Question 25

S

Answer 25

serine (Ser)

Question 26

T

Answer 26

Threonine (Thr)

Question 27

T

Answer 27

Threoine (Thr)

Question 28

W

Answer 28

Tryptophan (Trp)

Question 29

Y

Answer 29

Tyrosine (Tyr)

Question 30

V

Answer 30

Valine (Val)