Amino Acids

Question 1

Symbol for Glycine

Answer 1

Gly; G

Question 2

Symbol for Alanine

Answer 2

Ala; A

Question 3

Symbol for Valine

Answer 3

Val; V

Question 4

Symbol for Leucine

Answer 4

Leu; L

Question 5

Symbol for Isoleucine

Answer 5

Ile, I

Question 6

Symbol for Methionine

Answer 6

Met, M

Question 7

Symbol for Proline

Answer 7

Pro; P

Question 8

Symbol for Phenylalanine

Answer 8

Phe; F

Question 9

Symbol for Tryptophan

Answer 9

Trp; W

Question 10

Symbol for Lysine

Answer 10

Lys; K

Question 11

Symbol for Arginine

Answer 11

Arg; R

Question 12

Symbol for Histidine

Answer 12

His; H

Question 13

Symbol for Glutamine

Answer 13

Gln; Q

Question 14

Symbol for Asparagine

Answer 14

Asn; N

Question 15

Symbol for Cysteine

Answer 15

Cys; C

Question 16

Symbol for Tyrosine

Answer 16

Tyr; Y

Question 17

Symbol for Threonine

Answer 17

Thr; T

Question 18

Symbol for Serine

Answer 18

Ser; S

Question 19

Symbol for Aspartate

Answer 19

Asp; D

Question 20

Symbol for Glutamate

Answer 20

Glu; E

Question 21

What group are Aspartate and Glutamate in and what unique functional group do they have?

Answer 21

Negatively charged AA at neutral pH and have a carboxylic acid group. pKa is 4.1

Question 22

What is the pKa of the terminal alpha-carboxyl group?

Answer 22

3.1

Question 23

What is the pKa of the terminal alpha-amino group?

Answer 23

8.0

Question 24

What are the positively charged AA at neutral pH?

Answer 24

Lysine, Arginine, Histidine

Question 25

What group does Lysine have in its R substituent? What is the pKa and how does this affect the substituent?

Answer 25

Amino group (NH3+); 10.8; It is ionizable and can lose a proton (NH2)