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Home ‣ Biochemistry ‣ Structure and Properties of Amino Acids Comments
- Question
The sulphur containing side chain of cysteine is
Options- A. ampiphillic, highly reactive and capable of reacting with another cysteine
- B. hydrophillc, highly reactive and capable of reacting with another cysteine
- C. hydrophobic, highly reactive and capable of reacting with another cysteine
- D. none of the above
- Correct Answer
- hydrophobic, highly reactive and capable of reacting with another cysteine
- 1. How many different amino acids are there?
Options- A. 3
- B. 20
- C. 100
- D. An infinite number Discuss
- 2. Which of the following is not a sensible grouping of amino acids based on their polarity properties?
Options- A. Ala, Leu, and Val
- B. Arg, His, and Lys
- C. Phe, Trp, and Tyr
- D. Asp, Ile, and Pro Discuss
- 3. In a polypeptide average mass of an amino acid residue is
Options- A. 110 daltons
- B. 118 daltons
- C. 80 daltons
- D. 150 daltons Discuss
- 4. Which of the following amino acid contain an imidazolium moiety?
Options- A. Alanine
- B. Valine
- C. Cysteine
- D. Histidine Discuss
- 5. Which pair of amino acids absorbs the most UV light at 280 nm?
Options- A. Threonine & Histidine
- B. Trp & Tyrosine
- C. Cystein & Asparagine
- D. Phenylalnine & Proline Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. What is the heaviest of the twenty amino acids?
Options- A. Phenylalanine
- B. Tryptophan
- C. Tyrosine
- D. Histidine Discuss
- 10. 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
Structure and Properties of Amino Acids problems
Search Results
Correct Answer: 20
Correct Answer: Asp, Ile, and Pro
Correct Answer: 110 daltons
Correct Answer: Histidine
Correct Answer: Trp & Tyrosine
Correct Answer: L
Correct Answer: reactive hydroxyl group in the side chain
Correct Answer: all of the above
Correct Answer: Tryptophan
Correct Answer: 2.2, and 9.4
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