Bio1a Exam Chapter 2

59 Questions | Total Attempts: 48

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Bio1a Exam Chapter 2

This quiz covers biomolecules, properties of water, and atoms and elements. It is timed!


Questions and Answers
  • 1. 
    Type response below
  • 2. 
    Glucose, the primary source of energy for a cell, is a type of
    • A. 

      Polypeptide

    • B. 

      Polysaccharide

    • C. 

      Disaccharide

    • D. 

      Monosaccharide

  • 3. 
    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

  • 4. 
    Lipids are
    • A. 

      Hydrophobic

    • B. 

      Insoluble in water

    • C. 

      Important for energy storage

    • D. 

      All of these

  • 5. 
    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

  • 6. 
    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

  • 7. 
    Amino acids are the monomers that join together to form
    • A. 

      Carbohydrates

    • B. 

      Lipids

    • C. 

      Proteins

    • D. 

      Nucleic acids

  • 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. 
    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

  • 10. 
    Which organic molecules store the genetic information of a cell?
    • A. 

      Carbohydrates

    • B. 

      Proteins

    • C. 

      Lipids

    • D. 

      Nucleic acids

  • 11. 
    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

  • 12. 
    The atom is made of 3 subatomic particles. The subatomic particle found in the nucleus with a positive charge is the ___________.
    • A. 

      Electron

    • B. 

      Neutron

    • C. 

      Proton

  • 13. 
    The __________ is the smallest unit of matter.
    • A. 

      Element

    • B. 

      Atom

    • C. 

      Molecule

    • D. 

      Electron

  • 14. 
    An _______ bond is a bond in which electrons are transferred.
    • A. 

      Covalent

    • B. 

      Ionic

    • C. 

      Double

  • 15. 
    An acid has a pH below ______.
    • A. 

      7

    • B. 

      8

    • C. 

      9

    • D. 

      10

  • 16. 
    A base has a ph above _____.
    • A. 

      9

    • B. 

      8

    • C. 

      7

    • D. 

      10

  • 17. 
    Water is made of 1 oxygen molecule and _____ hydrogen atoms.
    • A. 

      3

    • B. 

      2

    • C. 

      1

    • D. 

      5

  • 18. 
    The water molecule is _________, because there is an uneven distribution of electron within the molecule.
    • A. 

      Uneven

    • B. 

      Weird

    • C. 

      Polar

    • D. 

      Strange

  • 19. 
    The element found in all living things...______-based life forms.
    • A. 

      Calcium

    • B. 

      Chloride

    • C. 

      Carbon

    • D. 

      Crystals

  • 20. 
    The nutrient group that organisms rely on for their energy production
    • A. 

      Proteins

    • B. 

      Lipids

    • C. 

      Carbohydrates

    • D. 

      Nucleic acids

  • 21. 
    The nutrient group that is used in the composition of enzymes, hormones, and does many different jobs around the cell.
    • A. 

      Proteins

    • B. 

      Lipids

    • C. 

      Carbohydrates

    • D. 

      Nucleic acids

  • 22. 
    The bio-molecular group that carries and passes on the hereditary information of the organism
    • A. 

      Proteins

    • B. 

      Lipids

    • C. 

      Carbohydrates

    • D. 

      Nucleic acids

  • 23. 
    These bio-molecules are significant features of the cell (plasma) membrane
    • A. 

      Protein and lipid

    • B. 

      Lipid and nucleic acid

    • C. 

      Carbohydrate and nucleic acid

    • D. 

      Nucleic acid and protein

  • 24. 
    The structural unit ("building block") of a protein is the
    • A. 

      Monosaccharide

    • B. 

      Fatty acid

    • C. 

      Nucleotide

    • D. 

      Amino acid

  • 25. 
    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

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