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SCI 135 - Second Exam Fall 2017
MULTIPLE CHOICE.
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. In the
lab, replacing the “regular” water with salt solution
_______ a. Raises the concentration of
water above the cell’s
b. Changes the permeability of the cell membrane
c. Lowers the concentration of water below the cell’s
d. Changes the permeability of the cell wall
e. Is a pretty rude thing to do to the leaf
2. What is
measured by looking at tiny gaps between objects?
_______ a. Resolution
b. Clarity c. Magnification
d. Repulsion e. Gappiness
3. On the lab
table is a flask with a whitish liquid labeled “STARCH.” The
whitish liquid is a
_______ a. Solvent
b. Solution c. Solvent
d. Hydration e. Bad substitute
for lunch
4. To get into a
cell, a particle must pass by/through which layers in order:
_______ a. Hydrophobic, hydrophilic,
hydrophilic, hydrophobic
b. Hydrophilic, hydrophobic, hydrophobic, hydrophilic
c. Hydrophilic, hydrophobic, hydrophilic, hydrophobic
d. Hydrophobic, hydrophilic, hydrophobic, hydrophilic
e. That is way too many layers
5. Two atoms
bond because one has a full positive charge and the other has a full
negative charge.
What kind of bond is it?
_______ a. Covalent
b. Balancing c. Neutral
d. Ionic e. Deeply personal
6. The main
reason that plants produce digestible
starches is that
_______ a. They supply nutrients to
animals
b. They provide structure to the plant
c. They will need to be broken down for later use
d. All of the above
e. It’s one of the few fun things plants can do
7.
Hormones could be
_______ a. Lipids or proteins
b. Proteins only c. Carbohydrates or
lipids d. Carbohydrates only
e. The cause of all of our misery
8. Which would
be a dehydration synthesis process?
_______ a. Water freezing
b. Amino acids linking together c.
Hormones connecting to receptors
d. Breakdown of lipids
e. I sort of recognize the words…but not together…
9. Which
Kingdom(s) do not have cell walls?
_______ a. They all have them
b. Animals only c. Bacteria and fungi
d. Plants only
e. What’s that Kingdom in Game of Thrones-?
10. Pure
water is most dense at what Celsius
temperature?
_______ a. 100o
b. 0o c. 12o
d. 4o e. There’s a Celsius
temperature?
11. The pressure
in root pressure is produced by
_______ a. Osmosis
b. Photosynthesis c. Living
cells d. Gravity
e. The GPS thingy – no, wait, that’s route pressure
12.
Sectioning is something that is done
_______ a. When molecules break down
b. During evaporation c. To microscope
specimens
d. Inside eukaryotes
e. When oranges grow
SHORT ANSWER.
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.
| 1. For each, what ions
are most common? |
ACIDS
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BASES
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2. What is the basic
function of an enzyme?
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| 3. Given here is one side (strand) of DNA.
Starting with this strand, show: |
Starting__________________________________________________________________________________
Strand
T G C T A C C G T
A T T G G C G A G
T C A T C G
____________________________________________________________________________________
Other DNA strand |
| 4. What are two different types
of proteins that can be found embedded in a cell
membrane? |
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5. You put the corner of
a paper towel into a water spill, and the water moves into the towel.
What property of water is in action there?
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| 6. What are two basic types of molecules
that are always some sort of polymer? |
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7. In the term
polyunsaturated fat, what does the term polyunsaturated
mean?
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8. What, technically, is a gene?
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9. What process
produces simple carbohydrates?
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10. An element in the
second column of the Periodic Table is almost always
found as a +2 ion. Briefly explain why.
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| 11. The two pieces of a
lipid molecule, including how many
of each piece - |
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| 12. What are two things that
non-coding DNA is or does? |
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13. What is the non-mathy
explanation for why there seems to be a maximum size limit on
cells?
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| 14. Label the following chemical reaction
with the general terms for each part – |
A
+
B
x
>
C
__________
___________
______________
_____________
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| 15. Actin and
myosin - |
Are
what kind
of molecules?
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Are
found
where?
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16. What is the basic
molecular formula for a simple sugar?
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LONG ANSWER.
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.
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1. Using the numbers of bonds as a
guide, fill in the symbols for either Carbon,
Hydrogen, Nitrogen, or Oxygen. |
Can't recreate
the original hand drawing.
O O O
O O O O
O O O
O O |
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2. Name
and give a
brief description for the four levels of
protein structure. |
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3. What are three different
ways that fresh-water organisms deal with
osmosis?
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| 4. Give four rules from
the Cell Theory. |
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5. Name
the two basic types of cells, and give three
sets of differences between them: |
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| 6. Give the
terms for each of the two groups in each microscope
category - |
Nature of the
Imaging Beam |
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How the Beam Interacts
with the specimen |
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7. What are four different types
of proteins involved in communication and/or signaling? |
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Link
to Answer Key
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.
What is it about free oxygen radicals that makes them so
reactive? Three Points.
What happens on the atomic level as the temperature goes
up? Three Points.
What is the main purpose of stomach acid? (Before you
write, it’s not breakdown!) Three Points.
Organic molecules, by definition, should have carbon,
hydrogen, and oxygen in them, but the definition leaves out the oxygen. Why?
Three Points.
When a cell process requires energy, what molecule usually
comes in and supplies it? Three Points.
Why is it useful for a poison to be a lipid? Three Points.
What molecule type, previously thought to have just a
couple of roles, is now being found to have a much bigger number of things that
it does? Three Points.
Some microscope specimens must be coated with what
material? Three Points.
Prokaryotes can all be kind of accurately talked about by
what other term? Three Points.
What’s a mosaic? Three Points.
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