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Amino Acids & Proteins – Multiple Choice Questions (Set 1)

July 27, 2018February 3, 20190372

Q.) pH (isoelectric pH) of alanine is

6.8

7.2

6.6

6.02

Q.) An aromatic amino acid is

Arginine

Lysine

Taurine

Tyrosine

Q.) Proteins contain

Only D-amino acids

Only L- α - amino acids

Both (A) and (B)

DL-Amino acids

Q.) All proteins contain the

Same 20 amino acids

Different amino acids

Only a few amino acids

300 Amino acids occurring in nature

Q.) Sulphur containing amino acid is

Leucine

Methionine

Valine

Asparagine

Q.) An example of sulphur containing amino acid is

2-Amino-3-mercaptopropanoic acid

2-Amino-3-hydroxypropanoic acid

Amino acetic acid

2-Amino-3-methylbutanoic acid

Q.) The optically inactive amino acid is

Valine

Threonine

Serine

Glycine

Q.) The true statement about solutions of amino acids at physiological pH is

All amino acids contain negatively charged side chains

All amino acids contain both positive and negative charges

Some amino acids contain only positive charge

All amino acids contain positively charged side chains

Q.) All the following are sulphur containing amino acids found in proteins except

Valine

Methionine

Threonine

Cysteine

Q.) At neutral pH, a mixture of amino acids in solution would be predominantly:

Dipolar ions

Hydrophobic

Nonpolar molecules

Positive and monovalent

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Q.) pH (isoelectric pH) of alanine is

Q.) An aromatic amino acid is

Q.) Proteins contain

Q.) All proteins contain the

Q.) Sulphur containing amino acid is

Q.) An example of sulphur containing amino acid is

Q.) The optically inactive amino acid is

Q.) The true statement about solutions of amino acids at physiological pH is

Q.) All the following are sulphur containing amino acids found in proteins except

Q.) At neutral pH, a mixture of amino acids in solution would be predominantly:

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