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Claire's MCAT Chem > amino acids biochem > Flashcards

amino acids biochem Flashcards

1
Q

Alanine

A

Ala A

functional group- alkane

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2
Q

Cysteine

A

Cys
C
functional group- thiol
pka 8

charge of side chain at neutral ph ~ 0 avg. charge

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3
Q

Aspartate

aspartic acid

A

Asp
D

functional group
carboxylic acid
approximate pka= 4

charge of side chain at neutral ph
-1 net charge

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4
Q

Glutamate

glutamic acid

A

Glu E
functional group- carboxylic acid

approximate pka- 4
charge of side chain at neutral ph
-1 net charge

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5
Q

Phenylalanine

A

Phe F

functional group- phenyl

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6
Q

Glycine

A

Gly G
functional group -
hydrogen

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7
Q

Histidine

A

His H
functional group–imidazole

approximate pka- 6

charge of side chain at neutral ph
~ 0 avg. charge

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8
Q

Isoleucine

A

Ile I

functional group- alkane

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9
Q

Lysine

A

Lys K
functional group- amine

approx. pka- 10

charge of side chain at neutral ph- +1 net charge

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10
Q

Leucine

A

Leu L

functional group- alkane

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11
Q

Methionine

A

Met M

functional group -thioether

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12
Q

Asparagine

A

Asn N

functonal group- amide

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13
Q

Proline

A 
Pro	P	(cyclic) 
functional group- alkane
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14
Q

Glutamine

A

Gln Q

functional group -amide

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15
Q

Arginine

A

Arg R
functional group- guanidinium

approximate pka- 12

charge of side chain at neutral pH= +1 net charge

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16
Q

Serine

A

Ser S

functional group- alcohol

17
Q

Threonine

A

Thr T

functional group- alcohol

18
Q

Valine

A

Val V

functional group -alkane

19
Q

Tryptophan

A

Trp W

functional group- indole

20
Q

Tyrosine

A

Tyr Y
functional group- phenol
approximate pKa- 10

charge of side chain at neutral pH= 0 avg. charge

21
Q 
Which of the following amino acids has no optical activity?
A.Methionine
B.Tyrosine
C.Aspartate
D.Glycine
A

D. Glycine

Since glycine has no chiral centers, it has no optical activity.

Claire's MCAT Chem (16 decks)

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