SC 135 - Second Exam 2011
Links connect to relevant
parts of the online book.
On the line to the left, place the letter of the choice that best answers the question.
Three Points Each. NOTE: "e" answers are never the correct answer.
1. The potential chemistry of an atom comes from
_______ a. The overall weight of the nucleus
b. The total number of electrons
c. The neutrons in the outer shell
d. The electrons in the outer shell
e. How juicy it is
2. Which material is naturally hydrophobic?
_______ a. Lipids b. Starches c. RNA
d. Proteins e. Materials are afraid of things?
3. The beam in an electron microscope is
_______ a. Focused with glass lenses b. Focused with magnets
c. Useful for living specimens d. Not affected by stains
e. Chock full of electrony goodness
4. Which bonds happen between areas that are partially charged?
_______ a. Ionic b. Covalent c. Hydrogen
d. Segmented e. Crappy
5. Which would break down to amino acids?
_______ a. Maltanol b. Maltose c. Maltogen
d. Maltase e. Maltinoacid
6. Enzymes are
a. Always proteins
b. Usually proteins but sometimes nucleic acids
_______ c. Usually lipids but sometimes proteins
d. Usually lipids but sometimes nucleic acids
e. Those things I meant to remember…
7. During digestion, organic polymers are broken down into components
using what chemical reaction?
_______ a. Dehydration synthesis b. Hydrolysis
c. Respiration d. Reduction
8. An unsaturated molecule would have
_______ a. All single bonds b. All multiple bonds
c. At least one multiple bond d. All of these
e. No need for a towel
9. The steroid hormone estrogen can be produced by cells with a lot
of material of the same general type. What type of cells?
_______ a. Muscle b. Bone c. Cartilage
d. Fat e. Huh? What? Huh?
10. Atoms can be radioactive if they have the “wrong” number of
_______ a. Neutrons b. Electrons c. Radions
d. Protons e. Facebook friends
11. Most of the DNA in our cells is
_______ a. Genes b. Lipids c. Non-coding
d. RNA e. Very cute
12. What is it about water that produces surface tension?
_______ a. Evaporation b. Adhesion
c. Freezing d. Cohesion
e. When the surface is really attracted to someone…
eight of the following questions for 4 Points Each.
Answer any four of the following questions for Eight Points Each.
Note: if you
answer more than four, only the
first four will be corrected.
BONUS QUESTIONS. Answer as many as you are able. Wrong answers will not result in points being lost from the main exam. You can get partial credit on these answers.
Why was the concept of atomic mass units invented? Three Points.
Why are there only 2 elements on the first row of the Periodic Table? Three Points.
In carbon dating, how does the usable carbon get into the materials? Three Points.
What free radical is most likely damaging your cells right now? Three Points.
Why do our local lakes “turn over” late in the year? Three Points.
Why do plants produce starches that are easy to break down? Three Points.
What two different behaviors are set off by ant alarmones? Two Points Each.
Which kind of molecule has had many new types and unsuspected functions discovered in recent years? Three Points.
When microscopes were being developed, what problem with the lenses had to be solved? Three Points.
Why do light microscopes have a fairly low resolution limit? Three Points.
Why do electron microscopes have to have vacuums in them? Three Points.