Module 1 Amino acids

Question 1

Name the acidic amino acids

Answer 1

Glutamate, Aspartate

Question 2

Name the basic amino acids

Answer 2

Arginine, Histidine, Lysine

Question 3

Non polar aliphatic R groups

Answer 3

Valine, Proline, Alanine, Leucine, Isoleucine, Methionine, Glycine

Question 4

Aromatic groups

Answer 4

Phenylalanine, Tyrosine, Tryptophan

Question 5

Polar uncharged R groups

Answer 5

Asparagine, Glutamine, Serine, Threonine, Cysteine

Question 6

Glutamate Glu E

Answer 6

Acidic, CH2-CH2-COO sidechain, trigonal planar

Question 7

Aspartate Asp D

Answer 7

Acidic, CH2-COO sidechain, trigonal planar

Question 8

Histidine His H

Answer 8

Basic, CH2-(C-NH-CH=N-CH=) ring

Question 9

Lysine Lys K

Answer 9

Basic, 4 CH2’s -NH2+

Question 10

Arginine Arg R

Answer 10

Basic, 3CH2’s-C(NH2)=NH2+

Question 11

Valine Val V

Answer 11

Non polar aliphatic, CH-2CH3’s

Question 12

Proline Pro P

Answer 12

Non polar aliphatic, 3CH2’s-NH2+ ring

Question 13

Leucine Leu L

Answer 13

Non polar aliphatic, CH2-CH-2CH3

Question 14

Isoleucine LLE I

Answer 14

structural isomer and beta branched

Question 15

Methionine Met M

Answer 15

2CH2-S-CH3, non polar aliphatic

Question 16

Glycine Gly G

Answer 16

-H less steric clash, very flexible, non polar aliphatic

Question 17

Alanine Ala A

Answer 17

-CH3, non polar aliphatic

Question 18

Asparagine Asn N

Answer 18

polar, uncharged - CH2-C(NH2)=O

Question 19

Glutamine Gln Q

Answer 19

polar, uncharged 2CH2 - C(NH2)=O

Question 20

Serine Ser S

Answer 20

CH2-OH polar uncharged

Question 21

Threonine Thy T

Answer 21

CH(CH3)(OH) polar uncharged

Question 22

Cysteine Cys C

Answer 22

very reactive polar uncharged, CH2-SH, deprotonate at pH 7

Question 23

Phenylalanine Phe F

Answer 23

CH2-benzene aromatic UV

Question 24

Tyrosine Tyr Y

Answer 24

CH2-phenol aromatic UV

Question 25

Tryptophan Trp W

Answer 25

CH2-C=CH-pentagon ring NH-hexagon (1 double bond in pentagon) (1 double bond in hexagon) aromatic UV

Question 26

Which group detect proteins and act as protein probes

Answer 26

Aromatic

Question 27

Oxidation of thiolates (SH) form

Answer 27

disulfide S-S bonds interchain and intrachain