Structure and Properties of Amino Acids problems
- 1. Which of the following amino acids can form hydrogen bonds with their side (R) groups?
Options- A. Asparagine
- B. Aspartic acid
- C. Glutamine
- D. All of these Discuss
Correct Answer: All of these
- 2. Which of the following is a nonstandard amino acid?
Options- A. Cysteine
- B. Isoleucine
- C. Hydroxyproline
- D. Histidine Discuss
Correct Answer: Hydroxyproline
- 3. Coomassie Blue stains the proteins by reacting with
Options- A. arginine residues
- B. free c-termini
- C. peptide bonds
- D. aromatic ring Discuss
Correct Answer: arginine residues
- 4. The isoelectric point of an amino acid is defined as the pH
Options- A. where the molecule carries no electric charge
- B. where the carboxyl group is uncharged
- C. where the amino group is uncharged
- D. of maximum electrolytic mobility Discuss
Correct Answer: where the molecule carries no electric charge
- 5. The sequence of letters 'WYQN' will represent
Options- A. Tryptophan, tyrosine, glutamic acid, asparagine
- B. Tryptophan, tyrosine, glutamine, asparagine
- C. Tryptophan, glutamine, tryptophan, asparagine
- D. Glutamine, tyrosine, tryptophan, aspartic acid Discuss
Correct Answer: Tryptophan, tyrosine, glutamine, asparagine
- 6. Which of the following is an essential amino acid?
Options- A. Tryptophan
- B. Methionine
- C. Lysine
- D. All of these Discuss
Correct Answer: All of these
- 7. Protein fluorescence arises primarily from which residue?
Options- A. Arginine
- B. Tryptophan
- C. Tyrosine
- D. Phenylalanine Discuss
Correct Answer: Tryptophan
- 8. D-Alanine and L-Alanine are technically known as
Options- A. anomers
- B. enantiomers
- C. epimers
- D. polymer Discuss
Correct Answer: enantiomers
- 9. Which of the following is not the hydrophobic and aromatic amino acid?
Options- A. Phenylalanine
- B. Tyrosine
- C. Tryptophan
- D. None of these Discuss
Correct Answer: None of these
- 10. When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes
Options- A. a cation
- B. nonpolar
- C. a zwitterions
- D. an isotope Discuss
Correct Answer: a zwitterions
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