MCQ On Biochemistry: Quiz!

15 Questions | Total Attempts: 1114

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MCQ On Biochemistry: Quiz! - Quiz

Do you know anything about biochemistry? Biochemistry is the research of chemical processes within and relating to living organisms. It examines chemical substances and functions in plants and animals, microorganisms, and the changes they encounter during their life process. Biochemistry investigates the nature of diseases and why and how they occur. This quiz encompasses a lot of information about biochemistry. Don’t forget to take your certificate upon the completion of this quiz.


Questions and Answers
  • 1. 
    What is the charge on the tetrapeptide: lys-lys-his-glu at pH=7?
    • A. 

      +2

    • B. 

      -1

    • C. 

      0

    • D. 

      +1

  • 2. 
    Which amino acid would have the greatest negative charge at pH=7.0?
    • A. 

      Threonine

    • B. 

      Cysteine

    • C. 

      Glutamic acid 

    • D. 

      Histidine

  • 3. 
    Based upon its side chain, how is the amino acid Ser classified?
    • A. 

      Positively charged 

    • B. 

      Polar 

    • C. 

      Non-polar

    • D. 

      Negatively charged

  • 4. 
    Which group consists only of amino acids with polar side chains?
    • A. 

      Serine, threonine, and valine

    • B. 

      Serine, threonine, and cysteine

    • C. 

      Serine, threonine, and leucine

    • D. 

      Serine, threonine, and isoleucine

  • 5. 
    Where can we find Carnosine which is a dipeptide, and it consists?
    • A. 

      In brain, leucine and methionine 

    • B. 

      Posterior pituitary gland, cysteine and tyrosine

    • C. 

      In muscle, β-Alanine and L-histidine

  • 6. 
    What is the oxidized form of Glutathione?
    • A. 

      GSH

    • B. 

      Gly

    • C. 

      Cys

    • D. 

      GSSG

  • 7. 
    How many peptide bonds will form between 5 amino acid?
    • A. 

      4

    • B. 

      3

    • C. 

      5

    • D. 

      1

  • 8. 
    The side chain in Histidine is called, and in which form we find it?
    • A. 

      Indole ring, protonated form

    • B. 

      Imidazole group, protonated and deprotonated form

    • C. 

      Imidazole group, deprotonated form

    • D. 

      Guanidino group, deprotonated form

  • 9. 
    Which of these amino acids is titrable?
    • A. 

      Ser, Thr 

    • B. 

      Tyr, Gln

    • C. 

      Cys, Tyr

    • D. 

      Asn, Gln

  • 10. 
    In Pka, for basic amino acid, we take the highest 2 values and for acidic amino acid, we take the lowest 2 values.
    • A. 

      True

    • B. 

      False

  • 11. 
    Disulfide bonds form between two residues of which amino acid?
    • A. 

      Cys

    • B. 

      Asn

    • C. 

      Tyr

    • D. 

      Ser

  • 12. 
    All these properties are for peptide bond between two amino acids except?
    • A. 

      Planar

    • B. 

      Trans formation

    • C. 

      Makes resonance

    • D. 

      Cis formation

  • 13. 
    At physiological pH, all amino acids have at least_____ charged groups.
    • A. 

      Cannot be determined 

    • B. 

      1

    • C. 

      3

    • D. 

      2

  • 14. 
    Which is the strongest bond? 
    • A. 

      Option 1

    • B. 

      Option 2

    • C. 

      Option 3

  • 15. 
    Gramicidin and Tyrocidine are found in ______ , and they make _______ .
    • A. 

      Antibiotics, D form

    • B. 

      Proteins, L form

    • C. 

      Protein, D form

    • D. 

      Antibiotics, L form

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