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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
Which of the following is not a sensible grouping of amino acids based on their polarity properties?

Phe, Trp, and Tyr
Asp, Ile, and Pro
Arg, His, and Lys
Ala, Leu, and Val

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Structure and Properties of Amino Acids
Stereo chemical configuration of all a-amino acids derived from proteins is

L
L and D
None of these
D

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Structure and Properties of Amino Acids
Molecules that bear charged groups of opposite polarity are known as

ion conversion
amphions
ambions
zwitterions

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Structure and Properties of Amino Acids
What is the heaviest of the twenty amino acids?

Histidine
Phenylalanine
Tryptophan
Tyrosine

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Structure and Properties of Amino Acids
In a polypeptide average mass of an amino acid residue is

150 daltons
80 daltons
118 daltons
110 daltons

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Structure and Properties of Amino Acids
D-Alanine and L-Alanine are technically known as

epimers
enantiomers
polymer
anomers

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