Structure and Properties of Amino Acids problems
- 1. Stereo chemical configuration of all a-amino acids derived from proteins is
Options- A. L
- B. D
- C. L and D
- D. None of these Discuss
Correct Answer: L
- 2. Serine and threonine are polar amino acids due to
Options- A. reactive hydroxyl group in the side chain
- B. reactive alcoholic group in the side chain
- C. reactive keto group in the side chain
- D. reactive aldehyde group in the side chain Discuss
Correct Answer: reactive hydroxyl group in the side chain
- 3. Proteins and macromolecular structures take on their higher order structures
Options- A. by self-assembly
- B. with the help of molecular chaperons
- C. with the help of precursor sequences that are removed from the final structures
- D. all of the above Discuss
Correct Answer: all of the above
- 4. What is the heaviest of the twenty amino acids?
Options- A. Phenylalanine
- B. Tryptophan
- C. Tyrosine
- D. Histidine Discuss
Correct Answer: Tryptophan
- 5. The ?-amino acids have a carboxyl group with a pK around __________ , and an amino group with a pK near __________ .
Options- A. 1.1, and 12.1
- B. 6.5, and 8.0
- C. 3.3, and 10.5
- D. 2.2, and 9.4 Discuss
Correct Answer: 2.2, and 9.4
- 6. Amino acids required in the human diet and not synthesized by the body are called
Options- A. specialized
- B. trace
- C. essential
- D. accessory Discuss
Correct Answer: essential
- 7. What is the end product of leucine metabolism?
Options- A. Acetyl-CoA
- B. Pyruvic acid
- C. Oxaloacetic acid
- D. Acetyl carnitine Discuss
Correct Answer: Acetyl-CoA
- 8. Which of the following is a nonprotein amino acid?
Options- A. Dopamine
- B. Hydroxylysine
- C. Cystine
- D. None of these Discuss
Correct Answer: Dopamine
- 9. Which of the following is not an essential amino acid?
Options- A. Aspartic acid
- B. Glutamic acid
- C. Glycine
- D. All of these Discuss
Correct Answer: All of these
- 10. Molecules that bear charged groups of opposite polarity are known as
Options- A. zwitterions
- B. ambions
- C. ion conversion
- D. amphions Discuss
Correct Answer: zwitterions
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