Midterm 1

Question 1

Alanine 3 letter and 1 letter code

Answer 1

Ala

A

Question 2

Alanine structure

Answer 2

Ala

A

Question 3

Glycine 3 and 1

Answer 3

Gly

G

Question 4

Valine 3 and 1

Answer 4

Val

V

Question 5

Leucine 3 and 1

Answer 5

Leu

L

Question 6

Isoleucine 3 and 1

Answer 6

Ile

I

Question 7

Methionine 3 and 1

Answer 7

Met

M

Question 8

Proline 3 and 1

Answer 8

Pro

P

Question 9

Phenylalanine 3 and 1

Answer 9

Phe

F

Question 10

Tryptophan 3 and 1

Answer 10

Trp

W

Question 11

Serine 3 and 1

Answer 11

Ser

S

Question 12

Glycine st

Answer 12

Gly

Question 13

Valine st

Answer 13

Val

Question 14

Leucine st

Answer 14

Leu

Question 15

Isoleucine st

Answer 15

Ile

Question 16

Methionine st

Answer 16

Met

Question 17

Proline st

Answer 17

Pro

Question 18

Phenylalanine st

Answer 18

Phe

Question 19

Trp st

Answer 19

Trp

Question 20

Ser st

Answer 20

Ser

Question 21

Threonine 3 and 1

Answer 21

Thr

T

Question 22

Threonine structure

Answer 22

Thr

Question 23

Asparagine 3 and 1

Answer 23

Asn

N

Question 24

Asparagine structure

Answer 24

Asn

Question 25

Glutamine 3 and 1

Answer 25

Gln

Q

Question 26

Glutamine sturcture

Answer 26

Gln

Question 27

Tyrosine 3 and 1

Answer 27

Tyr

Y

Question 28

Tyrosine structure

Answer 28

Tyr

Question 29

Cysteine 3 and 1

Answer 29

Cys

C

Question 30

Cysteine structure

Answer 30

Cys

Question 31

Lysine 3 and 1

Answer 31

Lys

K

Question 32

Lysine structure

Answer 32

Lys

Question 33

Arginine 3 and 1

Answer 33

Arg

R

Question 34

Arginine structure

Answer 34

Arg

Question 35

Histidine 3 and 1

Answer 35

His

H

Question 36

Aspartic acid 3 and 1

Answer 36

Asp

D

Question 37

Aspartic acid structure

Answer 37

Asp

Question 38

Glutamic acid 3 and 1

Answer 38

Glu

E

Question 39

Glutamic acid structure

Answer 39

Glu

Question 40

Basic amino acids

Answer 40

Lys, Arg, HIs

Question 41

Acidic aa

Answer 41

Asp Glu

Question 42

How are acidic and basic aa classified?

Answer 42

Based on whether the neutral form is an acid or a base

Question 43

1 Dal =

Answer 43

1/12 of mass of 12C

therefore equals 1 g/mol

Question 44

Determining L and D configuration

Answer 44

with H pointing towards you,
L form Co R N is in clockwise direction
D form is in counterclockwise direction

Question 45

Henderson Hassel back

Answer 45

pH= pKa+ log ( base/ acid)

Question 46

non polar aa

Answer 46

G, A , V, I < L , M, F, W, P

Question 47

polar no charge aa

Answer 47

G, Y, S, T, N Q, C, H

Question 48

cys can form disulphide bridges in

Answer 48

oxidative environments

in reducing environments in the cytoplasm, the cys does not form disulpide bridges

Question 49

pH less than pKa

Answer 49

remains in the protonated form

Question 50

pH= pKa

Answer 50

half and half of protonated and deprotonated form

Question 51

pH> pKa

Answer 51

mostly in deprotonated form

Question 52

pI

Answer 52

pH at which the molecule is neutral