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Structure and Properties of Amino Acids

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

Tyrosine
None of these
Phenylalanine
Tryptophan

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Structure and Properties of Amino Acids
When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes

nonpolar
a zwitterions
a cation
an isotope

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

None of these
L and D
L
D

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

Histidine
Valine
Isoleucine
Cysteine

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Structure and Properties of Amino Acids
Proteins and macromolecular structures take on their higher order structures

All of these
by self-assembly
with the help of precursor sequences that are removed from the final structures
with the help of molecular chaperons

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Structure and Properties of Amino Acids
Which pair of amino acids absorbs the most UV light at 280 nm?

Cystein & Asparagine
Threonine & Histidine
Trp & Tyrosine
Phenylalnine & Proline

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