Copy Of Biomolecules, Including Enzymes Quiz

21 Questions | Total Attempts: 54

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Biology Quizzes & Trivia

This quiz covers biomolecules, including enzymes. It is timed!


Questions and Answers
  • 1. 
    Glucose, the primary source of energy for a cell, is a type of
    • A. 

      Polypeptide

    • B. 

      Polysaccharide

    • C. 

      Disaccharide

    • D. 

      Monosaccharide

  • 2. 
    The atoms that make up carbohydrates are
    • A. 

      C, H and O

    • B. 

      C, H, O and N

    • C. 

      C and H

    • D. 

      C, H and N

  • 3. 
    Lipids are
    • A. 

      Hydrophobic

    • B. 

      Insoluble in water

    • C. 

      Important for energy storage

    • D. 

      All of these

  • 4. 
    Which of the following is not a function in which lipids play an important role?
    • A. 

      Vision

    • B. 

      Membrane structure

    • C. 

      Chemical signaling

    • D. 

      Storing energy

  • 5. 
    You have isolated an unidentified liquid from a sample of beans. You add the liquid to a beaker of water and shake vigorously. After a few minutes, the water and the other liquid separate into two layers. To which class of large biological molecules does the unknown liquid most likely belong?
    • A. 

      Proteins

    • B. 

      Lipids

    • C. 

      Nucleic acids

    • D. 

      Carbohydrates

  • 6. 
    Amino acids are the monomers that join together to form
    • A. 

      Carbohydrates

    • B. 

      Lipids

    • C. 

      Proteins

    • D. 

      Nucleic acids

  • 7. 
    Enzymes are
    • A. 

      Lipids

    • B. 

      DNA

    • C. 

      Carbohydrates

    • D. 

      Proteins

  • 8. 
    Which description BEST fits the class of molecules known as  nucleotides?
    • A. 

      A pentose sugar and a purine or pyrimidine

    • B. 

      A phosphate group and an adenine or uracil

    • C. 

      A nitrogenous base and a pentose sugar

    • D. 

      A nitrogenous base, a phosphate group, and a pentose sugar

  • 9. 
    Which of the following BEST describes the flow of genetic information in eukaryotic cells?
    • A. 

      Proteins ->DNA ->RNA

    • B. 

      DNA->RNA->proteins

    • C. 

      DNA->DNA->RNA

    • D. 

      DNA->proteins->DNA

  • 10. 
    Hemoglobin is a globular protein composed of four polypeptide chains and their associated heme groups. Each polypeptide chain is a string of amino acids. What holds the amino acids together?
    • A. 

      Hydrogen bonds

    • B. 

      Double covalent bonds

    • C. 

      Ionic bonds

    • D. 

      Peptide bonds

  • 11. 
    Which molecules are components of an RNA nucleotide?
    • A. 

      Phosphate, ribose, thymine

    • B. 

      Phosphate, ribose, uracil

    • C. 

      Phosphate, deoxyribose, uracil

    • D. 

      Phosphate, deoxyribose, thymine

  • 12. 
    Which organic molecules store the genetic information of a cell?
    • A. 

      Carbohydrates

    • B. 

      Proteins

    • C. 

      Lipids

    • D. 

      Nucleic acids

  • 13. 
    What is the major purpose of DNA?
    • A. 

      To protect the cells from viruses

    • B. 

      To help in amino acid biosynthesis

    • C. 

      To store genetic information and serve as template to make RNA

    • D. 

      To make carbohydrates during photosynthesis

  • 14. 
    Fatty acids are made with a long chain of
    • A. 

      Lipids

    • B. 

      Nucleotides

    • C. 

      Bonded hydrocarbon molecules

    • D. 

      Monosaccharides

    • E. 

      Amino acids

  • 15. 
    The final structure of a protein which may involve the combining of several polypeptide chains is referred to as the
    • A. 

      Secondary structure

    • B. 

      Tertiary structure

    • C. 

      Primary structure

    • D. 

      Quaternary structure

  • 16. 
    Carbohydrates containing more than 10 monosaccharide units are called
    • A. 

      Monosaccharides

    • B. 

      Oligosaccharides

    • C. 

      Monomers

    • D. 

      Polysaccharides

    • E. 

      Disaccharides

  • 17. 
    An unsaturated triglyceride contains
    • A. 

      5 to 10 amino acid groups

    • B. 

      The maximum amount of single bonds between hydrocarbons

    • C. 

      At least one double bond between hydrocarbons

    • D. 

      Standard base pairs of nucleotides

    • E. 

      Slightly different base pairs as thymine bonds with uracil

  • 18. 
    The part on an amino acid that determines the type of amino acid it is
    • A. 

      Carboxyl group

    • B. 

      Nitrogenous base

    • C. 

      The "R" group

    • D. 

      The peptide bond

    • E. 

      The amino group

  • 19. 
    Cholesterol is a type of
    • A. 

      Lipid

    • B. 

      Protein

    • C. 

      Carbohydrate

    • D. 

      Nucleic acid

    • E. 

      Monosaccharide

  • 20. 
    The molecule with  a chemical formula C5H10O5 would be classified as a
    • A. 

      Carbohydrate

    • B. 

      Polysaccharide

    • C. 

      Protein

    • D. 

      Nucleotide

    • E. 

      Lipid

  • 21. 
    The "essential amino acids" are essential to the human diet because
    • A. 

      They are required in peptide bonds

    • B. 

      All amino acids are needed to make a complete phospholipid

    • C. 

      Without them, unsaturated tryglycerides would be liquid at room temperature

    • D. 

      They cannot be produced by any of the chemical reactions that occur in human cells

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