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Home Biochemistry Structure and Properties of Amino Acids Comments

  • Question
  • In a polypeptide average mass of an amino acid residue is


  • Options
  • A. 110 daltons
  • B. 118 daltons
  • C. 80 daltons
  • D. 150 daltons

  • Correct Answer
  • 110 daltons 


  • Structure and Properties of Amino Acids problems


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    • 1. Which of the following amino acid contain an imidazolium moiety?

    • Options
    • A. Alanine
    • B. Valine
    • C. Cysteine
    • D. Histidine
    • Discuss
    • 2. 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
    • 3. What is the product of the catabolic breakdown of Arginine?

    • Options
    • A. Alpha-ketoglutarate
    • B. Fumarate
    • C. Oxaloacetate
    • D. Succinate
    • Discuss
    • 4. What is the product of the catabolic breakdown of Alanine?

    • Options
    • A. Fumarate
    • B. Oxaloacetate
    • C. Pyruvate
    • D. Malate
    • Discuss
    • 5. An essential amino acid is one that

    • Options
    • A. is essentially easy to synthesize
    • B. is essential to flagella motion
    • C. the body cannot synthesize
    • D. the body can synthesize under essential conditions
    • Discuss
    • 6. 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
    • 7. How many different amino acids are there?

    • Options
    • A. 3
    • B. 20
    • C. 100
    • D. An infinite number
    • Discuss
    • 8. 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
    • Discuss
    • 9. 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
    • 10. 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


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