Bio 103 5th Chapter

11 Questions | Total Attempts: 142

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Questions and Answers
  • 1. 
    Which of the following categories includes all others in the list ?
    • A. 

      Disaccharide

    • B. 

      Polysaccharide

    • C. 

      Starch

    • D. 

      Carbohydrate

  • 2. 
    Which of the following is true of unsaturated fats ?
    • A. 

      They are more common in animals than in plant

    • B. 

      They have double bonds in their fatty-acid chains

    • C. 

      They generally solidify at room temperature

    • D. 

      Two answers are correct

  • 3. 
    Enzyme that break down DNA catalyze the hydrolysis of the covalent bonds that join uncleotides together .What would happen to DNA molecule treated with these enzymes ?
    • A. 

      The two strands of the double helix would separate

    • B. 

      The phosphodiester linkage of the polynucleotide backbone would be broken

    • C. 

      The pyrimidine would be separated from the deoxyribose sugars

    • D. 

      All bases would be separated from the deoxyribose sugars

  • 4. 
    Which of the following is a sugar?  
    • A. 

      C5H12O6

    • B. 

      C8H16O16

    • C. 

      C4H8O4

    • D. 

      C12H12O12

  • 5. 
    Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA?
    • A. 

      5' -AGCT- 3' with 5' -TCGA- 3'

    • B. 

      5' -GCGC- 3' with 5' -ATAT- 3'

    • C. 

      5' -ATGC- 3' with 5'-GCAT-3'

    • D. 

      All the above

  • 6. 
    What is the reaction that break down the molecules by adding a water molecule ?
    • A. 

      Hydrolysis

    • B. 

      Dehydration

    • C. 

      Polymerization

    • D. 

      All the above

  • 7. 
    A sugar with the molecular formula C6H12O6 .what would be the molecular formula for a polymer made by linking 10 of this sugar by dehydration reactions?
    • A. 

      C60H120O60

    • B. 

      C60H102O51

    • C. 

      C60H100O50

    • D. 

      C60H111O51

  • 8. 
    Which of the following types of lipid consist of: 3 fatty acids + glycerol
    • A. 

      Fats

    • B. 

      Phosphlipids

    • C. 

      Stroid

    • D. 

      Non of the above

  • 9. 
    Which of the following can't digest by animal enzyme ?
    • A. 

      Chitin

    • B. 

      Cellulose

    • C. 

      Starch

    • D. 

      Glycogen

  • 10. 
    Which level of protein structure do the alpha helix and bata pleated sheet represent ?
    • A. 

      Primary

    • B. 

      Secondary

    • C. 

      Tertiary

    • D. 

      Quaternary

    • E. 

      All the above

  • 11. 
    To which carbon does the phosphate group linked ?
    • A. 

      3

    • B. 

      5

    • C. 

      1

    • D. 

      6

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