General Biology Test #2 Molecules And Cells

46 Questions | Total Attempts: 2235

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General Biology Test #2 Molecules And Cells

Multiple Choice: Choose the BEST answer


Questions and Answers
  • 1. 
    When subunits called monomers are bonded together, they form larger molecules called polymers. Proteins are a type of polymer. What is the monomer that makes up proteins?
    • A. 

      Amino acids

    • B. 

      Ions

    • C. 

      DNA

    • D. 

      Nucleotides

  • 2. 
    During photosynthesis, plants convert carbon dioxide and water to sugar and oxygen. In this reaction, sugar and oxygen are the;
    • A. 

      Enzymes

    • B. 

      Products

    • C. 

      Directions

    • D. 

      Reactants

  • 3. 
    What distinguishes one element from another?
    • A. 

      The number of protons in the nuclei of their atoms

    • B. 

      The number of atoms in a sample of each element

    • C. 

      The number of electrons in the nuclei of their atoms

    • D. 

      The number of nuclei in their atoms

  • 4. 
    How is an ionic bond formed between two atoms?
    • A. 

      A pair of electrons is shared between two atoms.

    • B. 

      The outer energy levels of the atoms are filled.

    • C. 

      An electrical force forms between pairs of electrons.

    • D. 

      An electrical force forms between oppositely charged ions.

  • 5. 
    What term describes the sugar in a glass of lemonade?
    • A. 

      Solvent

    • B. 

      Solution

    • C. 

      Solute

    • D. 

      Protein

  • 6. 
    What elements make up a carbohydrate?
    • A. 

      Carbon, nitrogen, and hydrogen

    • B. 

      Carbon, hydrogen, and oxygen

    • C. 

      Starches and sugars

    • D. 

      Carbon, hydrogen, nitrogen, and oxygen

  • 7. 
    How is a saturated fatty acid different from an unsaturated fatty acid?
    • A. 

      Saturated fatty acids contain at least one carbon-carbon double bond.

    • B. 

      Saturated fatty acids are found only in oils.

    • C. 

      Carbons in saturated fatty acids are bonded together only with covalent bonds.

    • D. 

      Saturated fatty acids contain only carbon-carbon single bonds.

  • 8. 
    What term describes the amount of energy that must be absorbed before a chemical reaction can start?
    • A. 

      Bond energy

    • B. 

      Activation energy

    • C. 

      Endothermic energy

    • D. 

      Exothermic energy

  • 9. 
    What are the parts that make up the lock-and-key model of enzyme function?
    • A. 

      Enzyme and products

    • B. 

      Enzyme and catalyst

    • C. 

      Enzyme and substrates

    • D. 

      Enzyme and active site

  • 10. 
    How does a catalyst affect the activation energy of a chemical reaction?
    • A. 

      It raises the activation energy of the reaction.

    • B. 

      It lowers the activation energy of the reaction.

    • C. 

      It has no effect on the activation energy of the reaction.

    • D. 

      First it lowers the activation energy to start the reaction, then it raises the activation energy to keep the reaction under control.

  • 11. 
    What term describes the reactants that an enzyme acts on?
    • A. 

      Substrate

    • B. 

      Lock-and-key

    • C. 

      Product

    • D. 

      Active site

  • 12. 
    Which conditions are likely to affect the shape of an enzyme?
    • A. 

      Concentration of substrate

    • B. 

      Temperature

    • C. 

      PH

    • D. 

      Both temperature and pH

  • 13. 
    Acidic solutions have a pH that is
    • A. 

      Less than 7

    • B. 

      Between 7 and 14

    • C. 

      A negative number

    • D. 

      More than 7

  • 14. 
    All organic compounds contain the element
    • A. 

      Carbon

    • B. 

      Nitrogen

    • C. 

      Calcium

    • D. 

      Sodium

  • 15. 
    The molecule below is a 
    • A. 

      Lipid

    • B. 

      Carbohydrate

    • C. 

      Protein

    • D. 

      Nucleic acid

  • 16. 
    The following molecules are mirror images of each other.  What is the term for this?
    • A. 

      Structural Isomers

    • B. 

      Stereoisomers

    • C. 

      Equivalents

    • D. 

      Nonequivalents

  • 17. 
    What is the correct term for the energy releasing graph below?
    • A. 

      Endothermic

    • B. 

      Exothermic

    • C. 

      Kinetic

    • D. 

      Passive

  • 18. 
    What is the correct term for the energy gaining graph below?
    • A. 

      Endothermic

    • B. 

      Exothermic

    • C. 

      Kinetic

    • D. 

      Passive

  • 19. 
    The graph below shows a catalyzed reaction vs. an uncatalyzed reaction.  Which of the following statements is true about the graph?
    • A. 

      The Catalyst lowers the energy needed for the reaction to proceed.

    • B. 

      The Catalyst raises the energy needed for the reaction to proceed.

    • C. 

      The Catalyst does not affect the reaction.

    • D. 

      The reaction will not work without the catalyst

  • 20. 
    Which term describes the tendency of a water molecule to stick to another water molecule?
    • A. 

      Cohesion

    • B. 

      Adhesion

    • C. 

      Density

    • D. 

      Bouyancy

  • 21. 
    Which term describes the tendency of a water molecule to stick to different types molecules?
    • A. 

      Cohesion

    • B. 

      Adhesion

    • C. 

      Density

    • D. 

      Bouyancy

  • 22. 
    The diagram below shows a water molecule.  What do the charges on either end of the molecule indicate about the molecule?
    • A. 

      Water is a polar molecule.

    • B. 

      Water is a nonpolar molecule.

    • C. 

      Water is an ionic compound.

    • D. 

      Water is an ion.

  • 23. 
    What structure is found in plant cells but not in animal cells?
    • A. 

      Nucleus

    • B. 

      Vesicle

    • C. 

      Vacuole

    • D. 

      Cell wall

  • 24. 
    What materials makes up a cell membrane?
    • A. 

      Phospholipids and proteins

    • B. 

      Cholesterol and nucleic acids

    • C. 

      Proteins, nucleic acids, and cholesterol

    • D. 

      Phospholipids, cholesterol, and proteins

  • 25. 
    What type of receptor is within a cell?
    • A. 

      Membrane receptor

    • B. 

      Intercellular receptor

    • C. 

      Intracellular receptor

    • D. 

      Ligand receptor