amino acids quiz Flashcards by J G | Brainscape

Q

essential amino acids

A

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

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Q

neutral amino acids

A

S,T,C,Y,N,Q

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Q

thiol containing AA

A

cysteine

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Q

sulfide containing AA

A

methionine

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Q

contains phenolic group

A

tyrosine

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Q

can be found at the surface of the cell

hydrophilic and polar

A

tyrosine

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Q

contains an amido group at the beta carbon

A

asparagine

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Q

contains an amido group at the gamma carbon

A

glutamiine

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Q

neutral nonpolar

A

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

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Q

simplest AA because it contains 2 H

A

glycine

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Q

the only optically inactive AA

A

glycine

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Q

AA containing a methyl group

A

alanine

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Q

AA containing an isopropyl group

A

valine

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Q

AA containing isobutyl group

A

leucine

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Q

AA containing sec-butylgroup

A

isoleucine

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Q

beta-branched AA

A

V, L, I

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Q

contains an imino acid

cyclic but not aromatic

A

proline

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Q

has a phenyl ring

A

phenylalanine

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Q

contains an indole ring

A

tryptophan

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Q

acidic amino acids

A

D, E

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Q

Basic amino acids

A

H, K, R

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Q

has a primary amine

epsilon amino group

A

lysine

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Q

has a guanidinium ion

A

arginine

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Q

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

A

S-configuration (counterclockwise)

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Q

AA with R config

A

cysteine

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Q

most hydrophobic AA

A

isoleucine

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Q

least hydrophobic

A

proline

Q

if pH > pKa, ionizable group will be

A

DEprotonated

Q

if pH < pKa, ionizable group will be

A

protonated

Q

if pH = pKa, ionizable group will be

A

mixture of protonated and deprotonated forms

zwitterion

Q

in _______pH, peptides will be isolated

A

isoelectric

Q

*A stereocenter occurs in all amino acids except for

A

glycine.

Q

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

A

L

Q

THE only AA which contains a secondary amine

A

proline

Q

occur in some but not all proteins

-derived from the common amino acids

A

Uncommon Amino Acids

Q

a free AA exist as ________

A

zwitterion

Q

– has equal positive and negative charges

-electrically neutral in solution

A

*Zwitterion

Q

the guanido group of arginine is connected to ___ carbon

A

delta

Q

how many confi of AA exist in our biological system

A

1

Q

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

A

amphoteric

Q

a cpd that has both + and - charges is called

A

dipolar

Q

Aromatic AA

A

Phenylalanine
Tyrosine
Tryptophan

Q

Sulfur containing AA

A

Methionine

Cysteine

Q

Alcohol AA

A

Serine threonine

Q

Side chain of alanine

A

Methyl

Q

Side chain of valine

A

Isopropyl

Q

Side chain of isoleucine

A

Sec-butyl

Q

Side chain of tryptophan

A

Indole ring

Q

Side chain of methionine

A

Sulfide

Q

Side chain of histidine

A

IMIDAZOLE

Q

Side chain of leucine

A

Isobutyl

Q

Side chain of asparagine

A

Amido group

Q

AA uncharged but highly polar

A

Asparagine

Glutamine

Q

Side chain of phenylalanine

A

Phenyl

Q

Side chain of threonine

A

Alcohol

Q

Side chain of serine

A

Alcohol

Q

Side chain of lysine

A

Alkylamino

Q

AA with amino group at epsilon carbon

A

Lysine

Q

Side chain of arginine

A

Guanido group/guanidinium ion

Q

Side chain of aspartate

A

Carboxylic acids/carboxylate anion

Q

Side chain of glutamine

A

Amido group at the gamma carbon

Q

Side chain of proline

A

Pyrrolidine

Q

Side chain of glutamate

A

Carboxylicbacid/carboxylate at gamma carbon

Q

Side chain of cysteine

A

Thiol

Q

AA with 2 stereocenters

A

Isoleucine and threonine

Q

AA are optically

A

active