EXAM1_Amino Acids

Question 1

How many NON-POLAR AA’s?

Answer 1

9

Question 2

How many POLAR UNCHARGED AA’s?

Answer 2

6

Question 3

How many POLAR CHARGED?

Answer 3

5 (2 acid, 3 basic)

Question 4

G (GLY) Glycine

Answer 4

GLYCINE - NONPOLAR

- smallest (-H group)

Question 5

A (ALA) Alanine

Answer 5

ALANINE- NON POLAR

- not chiral (ch3 group)

Question 6

V (VAL) Valine

Answer 6

VALINE- NON POLAR

- branched

Question 7

L (LEU) Leucine

Answer 7

LEUCINE- NON-POLAR

-branched

Question 8

I (ILE) Isoleucine

Answer 8

ISOLEUCINE- NON-POLAR

-branched

Question 9

M (MET) Methionine

Answer 9

METHIONINE- NON-POLAR

• has Sulfur (no disulfide bonding- only Cysteine)
• masked polar group

Question 10

F (PHE) Phenylalanine

Answer 10

PHENYLALANINE- NON-POLAR

-aromatic ring

Question 11

W (TRP) Tryptophan

Answer 11

TRYPTOPHAN- NON-POLAR

• aromatic ring
• Masked polar group

Question 12

P (PRO) Proline

Answer 12

PROLINE- NON-POLAR

-imino acid (Most Restricted)

Question 13

S (SER) Serine

Answer 13

SERINE- Polar

- OH GROUP

Question 14

T (THR) Threonine

Answer 14

THREONINE- Polar

-OH GROUP

Question 15

Y (TYR) TYrosine

Answer 15

TYROSINE- Polar

-OH GROUP

Question 16

N (ASN) asparagine

Answer 16

ASPARAGINE- Polar

-Carboxamide (CONH2)

Question 17

Q (GLN) Glutamine

Answer 17

GLUTAMINE- Polar

-Carboxamide (CONH2)

Question 18

C (CYS) Cysteine

Answer 18

Cysteine- Polar

• SH group
• only AA to DISULFIDE BOND

Question 19

D (ASP) Aspartate

Answer 19

ASPARTATE- Polar -Neg-CHARGED

-Acid COOH- group

Question 20

E (GLU) Glutamate

Answer 20

GLUTAMATE- Polar -Neg-CHARGED

-Acid COOH- group

Question 21

H (HIS) Histidine

Answer 21

HISTIDINE- Polar +Pos+Charged (but not?)

• Base
• charge between 0-1

Question 22

R (ARG) Arginine

Answer 22

ARGININE- Polar +Pos+Charged

-Base

Question 23

K (LYS) Lysine

Answer 23

LYSINE- Polar +Pos+Charged

-Base