SC 135 - Second Exam Spring 2013
Links in each number connect to the pertinent sections 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.
_______ a. Are drugs that kill bacteria by degrading cell walls
b. Are potential invaders that the body should block out
c. Block the movement of electrons in DNA
d. Are made to attach to foreign molecules
e. Are what they start with on The Biggest Loser
2. If fertilizers run off from farms to streams, they dissolve in the water in very
small amounts, concentrations much lower than found in the plants
living in the stream. Those molecules move into the plants through
_______ a. Osmosis b. Active transport c. The membrane directly
d. Passive transport e. A need to crash
on their couches
Water is most dense
_______ a. At 100oC b. At 40oC c. At 0oC
d. At 4oC e. When
taking biology exams
4. When it is said that Life has “protein-based chemistry,” that means
b. All of the molecules break down to proteins
c. That everything was once proteins, but isn’t anymore
d. Everything depends on enzymes to work
e. Proteins are getting some pretty hefty
5. The leading hypothesis
about why cells have a maximum size limit involves
_______ a. How far a cell can move in a day
b. How easy it is for connected cells to interact
c. The mathematical relationship between volume and surface area
d. All of these factors
e. The body image presented by the cell
If a molecule is saturated, it has
_______ a. Only carbon in it b. Only single bonds
c. Only multiple bonds d. Water molecules all around it
e. Got to get into a program
The phospholipid bilayer is set up with
_______ a. Hydrophilic phosphates facing out and in, hydrophobic lipids between
b. Hydrophilic phosphates facing out, hydrophobic lipids facing in
c. Hydrophobic phosphates facing out and in, hydrophilic lipids between
d. Hydrophobic phosphates facing out, hydrophilic lipids facing in
e. There are way too many words in this thing…if those are words…
In sectioning, specimens would be
_______ a. Divided into different groups b. Thinly sliced
c. Separated by barriers d. Separated chemically
e. Given tickets and sent to different doors
9. Molecules may be polar because
_______ a. Minerals may be affected by magnetic fields
b. They were first discovered active in ice
c. They take a long cylindrical shape
d. Covalent bonds are not always equal sharing
e. They’re covered in pretty white hair
Digestion requires what type of chemical
_______ a. Reduction b. Hydrolysis c. Oxidation
d. Dehydration synthesis e. Burpilation
11. Actin is a
_______ a. Protein used in movement b. Part of the DNA code
c. Usable energy carrier d. Membrane pump
e. A thing that artistic hillbillies might do
12. With dissecting microscopes, you see the surface of the specimen.
What type of microscope
are the dissecting ‘scopes?
_______ a. Reflective b. Refractive c. Mirror
d. Scanning e. Kind of alarming
Answer any eight of the following questions for 4 Points Each.
Note: if you answer more than eight, only the first eight will be corrected.
You can get partial credit on these answers.
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.
You can get partial credit on these answers.
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.
A block of material that was covered after the last exam was left off the very beginning of the study sheet. What was that block about? Three Points.
Local lakes “turn over.” How does that work? Three Points.
Why is “turning over” really good for the lakes as ecosystems? Three Points.
What type of nutrients tend to prevent free radical damage? Three Points.
When photosynthesis takes in light, where exactly does that energy go? Three Points.
How is microscope resolution determined? Three Points.
Leeuwenhoek is considered a critical figure in the history of microscopes, but he didn’t work on microscopes. What did he work on? Three Points.
One type of microscope must have vacuum inside it. Why? Three Points.
Stains are good for making things visible, but they may also do what other useful thing? Three Points.
Bacteria do something that isn’t quite sexual reproduction, but it’s somewhat similar. What is it? Three Points.
Why would an adaptation to resist osmosis in fresh water be equally useful for living on land? Three Points.