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Botany > amino acids quiz > Flashcards

amino acids quiz Flashcards

1
Q

essential amino acids

A

L,I,V,H,K,M, F,T,W

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2
Q

neutral amino acids

A

S,T,C,Y,N,Q

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3
Q

thiol containing AA

A

cysteine

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4
Q

sulfide containing AA

A

methionine

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5
Q

contains phenolic group

A

tyrosine

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6
Q

can be found at the surface of the cell

hydrophilic and polar

A

tyrosine

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7
Q

contains an amido group at the beta carbon

A

asparagine

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8
Q

contains an amido group at the gamma carbon

A

glutamiine

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9
Q

neutral nonpolar

A

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

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10
Q

simplest AA because it contains 2 H

A

glycine

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11
Q

the only optically inactive AA

A

glycine

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12
Q

AA containing a methyl group

A

alanine

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13
Q

AA containing an isopropyl group

A

valine

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14
Q

AA containing isobutyl group

A

leucine

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15
Q

AA containing sec-butylgroup

A

isoleucine

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16
Q

beta-branched AA

A

V, L, I

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17
Q

contains an imino acid

cyclic but not aromatic

A

proline

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18
Q

has a phenyl ring

A

phenylalanine

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19
Q

contains an indole ring

A

tryptophan

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20
Q

acidic amino acids

A

D, E

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21
Q

Basic amino acids

A

H, K, R

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22
Q

has a primary amine

epsilon amino group

A

lysine

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23
Q

has a guanidinium ion

A

arginine

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24
Q

out of the 19 AA, what is the config of th 18 AA

A

S-configuration (counterclockwise)

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25
Q

AA with R config

A

cysteine

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26
Q

most hydrophobic AA

A

isoleucine

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27
Q

least hydrophobic

28
Q

if pH > pKa, ionizable group will be

A

DEprotonated

29
Q

if pH < pKa, ionizable group will be

A

protonated

30
Q

if pH = pKa, ionizable group will be

A

mixture of protonated and deprotonated forms

zwitterion

31
Q

in _______pH, peptides will be isolated

A

isoelectric

32
Q

*A stereocenter occurs in all amino acids except for

33
Q

*The amino acids that occur in proteins are all of the — form.

34
Q

THE only AA which contains a secondary amine

35
Q

occur in some but not all proteins

-derived from the common amino acids

A

Uncommon Amino Acids

36
Q

a free AA exist as ________

A

zwitterion

37
Q

– has equal positive and negative charges

-electrically neutral in solution

A

*Zwitterion

38
Q

the guanido group of arginine is connected to ___ carbon

39
Q

how many confi of AA exist in our biological system

40
Q

a cpd that can act as acid and a base is called

A

amphoteric

41
Q

a cpd that has both + and - charges is called

42
Q

AA are optically

42
Q

Aromatic AA

A

Phenylalanine
Tyrosine
Tryptophan

43
Q

Sulfur containing AA

A

Methionine

Cysteine

44
Q

Alcohol AA

A

Serine threonine

45
Q

Side chain of alanine

46
Q

Side chain of valine

47
Q

Side chain of isoleucine

48
Q

Side chain of tryptophan

A

Indole ring

49
Q

Side chain of methionine

50
Q

Side chain of histidine

51
Q

Side chain of leucine

52
Q

Side chain of asparagine

A

Amido group

53
Q

AA uncharged but highly polar

A

Asparagine

Glutamine

54
Q

Side chain of phenylalanine

55
Q

Side chain of threonine

56
Q

Side chain of serine

57
Q

Side chain of lysine

A

Alkylamino

58
Q

AA with amino group at epsilon carbon

59
Q

Side chain of arginine

A

Guanido group/guanidinium ion

60
Q

Side chain of aspartate

A

Carboxylic acids/carboxylate anion

61
Q

Side chain of glutamine

A

Amido group at the gamma carbon

62
Q

Side chain of proline

A

Pyrrolidine

63
Q

Side chain of glutamate

A

Carboxylicbacid/carboxylate at gamma carbon

64
Q

Side chain of cysteine

65
Q

AA with 2 stereocenters

A

Isoleucine and threonine

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