Hardest Molecular Biology Exam: Quiz

20 Questions | Total Attempts: 124

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Hardest Molecular Biology Exam: Quiz

Are you ready for the hardest molecular biology quiz? There is so much that students can learn about macromolecules and the macromolecular mechanisms found in living things. Some of this includes the effect of sugars and the effect it has on the body processes. Do you think you know enough about the processes that cells have between each other? This quiz will help you see how true that is based on your score. Check it out!


Questions and Answers
  • 1. 
    Dihydroxyacetone has a D-form and an L-form.
    • A. 

      True

    • B. 

      False

  • 2. 
    Which of the following statements regarding L-sugars is not true.
    • A. 

      Some can be utilized by the body directly

    • B. 

      L-fucose must be converted into D-form to be utilized

    • C. 

      L-xylulose is present in some fruits and may cause alimentary pentosuria

    • D. 

      L-arabinose and L-fucose are components of glycoproteins

  • 3. 
    Which of the following statements regarding D-fructose is not true.
    • A. 

      It is the main sugar of semen

    • B. 

      It enters in the formation of sucrose

    • C. 

      It is dextrorotatory

    • D. 

      It is present in the form of pyran ring when it is dissolved in solution

  • 4. 
    Pentose sugars compose some vitamins.
    • A. 

      True

    • B. 

      False

  • 5. 
    Which of the following sugars is found in the sugars of C.N.S?
    • A. 

      Lactose

    • B. 

      Sucrose

    • C. 

      D-galactose

    • D. 

      L-fructose

  • 6. 
    To which carbon is an amino group attached to in amino sugars?
    • A. 

      1

    • B. 

      2

    • C. 

      4

    • D. 

      6

  • 7. 
    Carbon 3 in sugar can be an anomeric carbon.
    • A. 

      True

    • B. 

      False

  • 8. 
    Which of the following statements regarding sugar acids is not true.
    • A. 

      Glucuronic acid is the only sugar acid that is a component of glycosaminoglycans

    • B. 

      L-iduronic acid is the 5-epimer of D-glucuronic acid

    • C. 

      Glucuronic acid is used by the liver for the detoxification of phenols

    • D. 

      L-ascorbic acid is the derivative of aldonic acid

    • E. 

      None of the above

  • 9. 
    Sialic acid is the result of the condensation of pyruvic acid and glucosamine.
    • A. 

      True

    • B. 

      False

  • 10. 
    Which of the following statements is not true regarding disaccharides?
    • A. 

      The glycosidic bond must form between the anomeric carbons of the two monosaccharides

    • B. 

      They can be either d or l

    • C. 

      They are formed by condensaton reaction

    • D. 

      Two of the above

  • 11. 
    Which of the following statements is true regarding sucrose?
    • A. 

      It is a non-reducing sugar

    • B. 

      Its hydrolysis will change its optical activity

    • C. 

      It contains 1,4-glycosididc bond

    • D. 

      All of the above

    • E. 

      Two of the above

  • 12. 
    Isomaltose differs only from maltose in the arrangement of some bonds
    • A. 

      True

    • B. 

      False

  • 13. 
    Which of the following is/are true when comparing between glycogen and amylose?
    • A. 

      Glycogen is branched.amylose is not branched

    • B. 

      Glycogen contains 1,6-glycosidic bonds only.while amylose contain 1,4

    • C. 

      Both can be hydrolysed partially by dilute mineral acids

    • D. 

      Two of the above

  • 14. 
    Which of the following statements regarding glycosaminoglycans is true?
    • A. 

      Uronic acid must be present in the disaccharide unit making up the glycosaminglycans

    • B. 

      It is only the amino group portion of the amino sugar that can be sulfated.

    • C. 

      Acetylation of the amino group increases the positve charge of the amino group

    • D. 

      The uronic acid may be sulfated

  • 15. 
    Which of the following statements regarding hyaluronic acid is true?
    • A. 

      It is present in the bones

    • B. 

      It does not contain sulfate

    • C. 

      It makes extracellular matrix loose because it repels water molecules

    • D. 

      It does not have any function in the early embryo

  • 16. 
    Which of the following GAG s play a role in the development of atherosclerosis?
    • A. 

      Chondroitin sulfate

    • B. 

      Dermatan sulfate

    • C. 

      Keratan sulfate

    • D. 

      Heparin

  • 17. 
    Which of the following statements is not true regarding heparin?
    • A. 

      It is mostly found in the connective tissue matrix

    • B. 

      It is an anticoagulant that activates antithrombin

    • C. 

      It is formed of sulfated glucosamine and sulfated glucuronic acid

    • D. 

      It activates lipoprotein which digests plasma lipids

    • E. 

      None of the above

  • 18. 
    Which of the following glycosaminoglycans does not form a part of proteoglycans?
    • A. 

      Dermatan sulfate

    • B. 

      Chondroitin sulfate

    • C. 

      Heparin

    • D. 

      Keratan sulfate

    • E. 

      None of the above

  • 19. 
    Which of the following is not true regarding unsaturated fatty acids?
    • A. 

      They are named by adding the suffx "enoic" after the systematic name

    • B. 

      Omega numbering begins from the side that is opposite to the side with carboxyl group

    • C. 

      They naturally occur in the trans form

    • D. 

      They can contain morethan one double bond

  • 20. 
    Monoethenoid fatty acid is an essential fatty acid.
    • A. 

      True

    • B. 

      False

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