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Home Biochemistry Structure and Properties of Amino Acids Comments

  • Question
  • What is the end product of leucine metabolism?


  • Options
  • A. Acetyl-CoA
  • B. Pyruvic acid
  • C. Oxaloacetic acid
  • D. Acetyl carnitine

  • Correct Answer
  • Acetyl-CoA 


  • Structure and Properties of Amino Acids problems


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    • 1. 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
    • 2. 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
    • 3. What is the heaviest of the twenty amino acids?

    • Options
    • A. Phenylalanine
    • B. Tryptophan
    • C. Tyrosine
    • D. Histidine
    • Discuss
    • 4. 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
    • 5. 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
    • 6. Which of the following is a nonprotein amino acid?

    • Options
    • A. Dopamine
    • B. Hydroxylysine
    • C. Cystine
    • D. None of these
    • Discuss
    • 7. Which of the following is not an essential amino acid?

    • Options
    • A. Aspartic acid
    • B. Glutamic acid
    • C. Glycine
    • D. All of these
    • Discuss
    • 8. Molecules that bear charged groups of opposite polarity are known as

    • Options
    • A. zwitterions
    • B. ambions
    • C. ion conversion
    • D. amphions
    • Discuss
    • 9. 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
    • 10. Which of the following is a nonstandard amino acid?

    • Options
    • A. Cysteine
    • B. Isoleucine
    • C. Hydroxyproline
    • D. Histidine
    • Discuss


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