Biology Test: The Chemical Basis Of Life

27 Questions | Total Attempts: 52

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Biology Test:  The Chemical Basis Of Life

Questions and Answers
  • 1. 
    You do not need to complete this table. 
  • 2. 
    Based on your answer to question 15, diagram an oxygen atom on a separate sheet of paper.  Indicatea)  what type of subatomic particles are in the nucleus (1 pt), and how many of each (1 pt), andb) which energy levels the electrons are in (1 pt).
  • 3. 
    Is oxygen a reactive element? (1 pt) Why or why not? (1 pt)
  • 4. 
    Define molecule in your own words.  (1pt)
  • 5. 
    Explain the difference between ionic and covalent bonds (1pt). 
  • 6. 
    Name one trace element.  (1 pt)  Describe its importance in the human body. (1pt)
  • 7. 
    We've defined life as something that grows, reproduces, responds to stimuli, maintains homeostasis, uses energy, and adapts over time.  Are atoms alive?  Explain your answer.  (1 pt)
  • 8. 
    Describe the general relationship between monomers and polymers. (1pt)
  • 9. 
    Name the two types of polysaccharides found in plants and describe the function of each. (1 pt each)
  • 10. 
    What is a polypeptide chain? (1 pt)  
  • 11. 
    The most abundant elements in most living things are . . .
    • A. 

      Oxygen, carbon, hydrogen, and nitrogen.

    • B. 

      Oxygen, carbon dioxide, hydrogen, and nitrogen.

    • C. 

      Oxygen, carbon, hydrogen, and calcium.

    • D. 

      Oxygen, carbon, sodium, and nitrogen.

  • 12. 
    Can humans see individual atoms?
    • A. 

      Yes, with the naked eye.

    • B. 

      Yes, with a regular light microscope right here at BUHS.

    • C. 

      Kind of, if we bounce electrons off of them in the world's most expensive, complex microscopes.

    • D. 

      No, atoms are just imaginary things made up by science teachers.

  • 13. 
    There are 118 known elements, and the atoms of 111 of these react with other atoms.  Why?
    • A. 

      They need to balance the number of protons and electrons that they have.

    • B. 

      They need to balance the number of protons and neutrons that they have.

    • C. 

      They need to reduce the number of subatomic particles that they have.

    • D. 

      They need to get a full outer energy level of electrons.

  • 14. 
    In chemical reactions, atoms are . . . 
    • A. 

      Rearranged--thanks to bonding.

    • B. 

      Created--brought into existence.

    • C. 

      Destroyed--removed from existence.

  • 15. 
    The general term for the atoms and/or molecules that enter into a chemical reaction is  . . . 
    • A. 

      Reactants.

    • B. 

      Dependent variables.

    • C. 

      Products.

    • D. 

      Valence electrons.

  • 16. 
    Looking at the Periodic Table, which pair of atoms is most likely to react with each other?
    • A. 

      He and K (helium and potassium) to form HeK

    • B. 

      Ar and F (argon and fluorine) to form ArF

    • C. 

      Br and At (bromine and astatine) to form BrAt

    • D. 

      O and Mg (oxygen and magnesium) to form OMg

  • 17. 
    Water molecules are polar, with the . . .
    • A. 

      Oxygen side being slightly negative and the hydrogen side being slightly positive.

    • B. 

      Oxygen and hydrogen sides being slightly positive.

    • C. 

      Oxygen side being slightly positive and hydrogen side being slightly negative.

    • D. 

      Oxygen and hydrogen sides being slightly negative.

  • 18. 
    A water strider can walk on water but not oil because . . . 
    • A. 

      Bugs are less dense than water but more dense than oil.

    • B. 

      Oil is deadly to all life.

    • C. 

      Of surface tension caused by hydrogen bonds between the water molecules, that aren't found between the oil molecules.

    • D. 

      Gravity is diluted by water, but not by oil.

  • 19. 
    Ice floats on water because . . .
    • A. 

      Its molecules are less densely packed than those in liquid water.

    • B. 

      Of adhesion.

    • C. 

      Its molecule are more densely packed than those of liquid water.

    • D. 

      Of cohesion.

  • 20. 
    Which of the following statements about non-polar molecules is false?
    • A. 

      They share their electrons evenly.

    • B. 

      They cannot form hydrogen bonds.

    • C. 

      Since they don't form hydrogen bonds, they tend to heat up more slowly than water does.

    • D. 

      They do not have positive and negative regions like polar molecules do.

  • 21. 
    Blast from the past!  Imagine you want to study the effectiveness of giving a study guide to students, in order to see if it really helps them or not.  You take two relatively equal biology classes, teach them the same material, and give them the same test.  However, you only give one of the classes a study guide for the test.  Which of these statements about this experiment is false?
    • A. 

      The independent variable in the experiment is the study guide.

    • B. 

      The dependent variable in the experiment is the performance of the students on the test.

    • C. 

      The control in the experiment is the class that did not receive a study guide.

    • D. 

      The data (average test grades on a 0-100 scale) is going to be qualitative.

  • 22. 
    The term for an atom that has gained or lost an electron and therefore become charged is a(n) . . .
    • A. 

      Compound

    • B. 

      Bond

    • C. 

      Ion

    • D. 

      Molecule

    • E. 

      Acid

  • 23. 
    A(n) _____________________________ is a bond between the slightly positive side of one molecule  and the slightly negative side of another molecule.
    • A. 

      Ionic bond

    • B. 

      Covalent bond

    • C. 

      Uneven bond

    • D. 

      Hydrogen bond

    • E. 

      Eternal bond

  • 24. 
    Based on the table above, how many protons does an oxygen atom have?
    • A. 

      8

    • B. 

      16

    • C. 

      4

    • D. 

      10

    • E. 

      6

    • F. 

      30

    • G. 

      None

  • 25. 
    Are individual organic macromolecules alive?
    • A. 

      Yes

    • B. 

      No

    • C. 

      Only if you feed them after midnight

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