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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
How many different amino acids are there?

3
20
An infinite number
100

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

L and D
L
D
None of these

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Structure and Properties of Amino Acids
Serine and threonine are polar amino acids due to

reactive alcoholic group in the side chain
reactive aldehyde group in the side chain
reactive keto group in the side chain
reactive hydroxyl group in the side chain

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Structure and Properties of Amino Acids
Which amino acids would most likely reside in the membrane-anchoring domain of a membrane embedded protein?

Isoleucine, valine and phenylalanine
Phenylalanine, valine, and aspartate
Lysine, arginine and histidine
Leucine, threonine, and lysine

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Structure and Properties of Amino Acids
An essential amino acid is one that

is essentially easy to synthesize
the body can synthesize under essential conditions
the body cannot synthesize
is essential to flagella motion

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Structure and Properties of Amino Acids
Protein fluorescence arises primarily from which residue?

Arginine
Phenylalanine
Tryptophan
Tyrosine

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MORE MCQ ON Structure and Properties of Amino Acids

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