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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
Which of the following amino acid is known as half-cystine residue?

Valine
Histidine
Cysteine
Isoleucine

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

80 daltons
118 daltons
150 daltons
110 daltons

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Structure and Properties of Amino Acids
Which of the following is a nonstandard amino acid?

Histidine
Isoleucine
Hydroxyproline
Cysteine

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Structure and Properties of Amino Acids
Which amino acid when exposed to ninhydrin produces a brown color?

Alanine
Proline
Valine
Asparagine

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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?

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

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Structure and Properties of Amino Acids
Which of the following is not the hydrophobic and aromatic amino acid?

None of these
Phenylalanine
Tryptophan
Tyrosine

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