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SCI 135 - Second Exam Spring 2019
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. Which is most
likely to involve hydrolysis?
_______ a. Making a protein
b. Dissolving a salt
c. Digesting a starch
d. Moving molecules through a membrane
e. Isn’t that, like, illegal or something -?
2.
Steroid hormones are in the same molecule
class with
_______ a. Corn starch
b. Olive oil c. Egg white
protein d. Milk sugar
e. The other pumped-up molecules
3.
Molecules in cells almost never have
_______ a. Single covalent bonds
b. Multiple covalent bonds c. Hydrogen
bonds d. Ionic bonds
e. Their own Instagram accounts
4. Which should
contain amino acids?
_______ a. Cellulose
b. Unused cooking oil c. Kinase
d. Any type of acid e. Is that
Italian?
5. The
fluid mosaic model is an explanation for
_______ a. Membrane structure
b. DNA code-to-protein c. Cell wall
structure d. Microscope beam
projection
e. Umm, something wet-?
6. Compared with
a solution of pH 12, one of pH 11 is
_______ a. Twice as basic
b. Half as basic c. Ten times more
basic d. Ten times less basic
e. Given a different number
7. Which is a
direct measurement of ability to focus clearly?
_______ a. Focality
b. Resolution c. Intensity
d. Magnification e. “No, that’s a bit
fuzzy…”
8. The only
Kingdom to not have cell
walls:
_______ a. Animalia
b. Protista c. Fungi
d. Monera e. Nonwallia
9. The
organization of periodic table columns is based upon
_______ a. Protons
b. Neutrons c. Electrons
d. Molecules e. Eeeny, meeny,
miney, moe...
10. In a cup of
coffee, caffeine would be a
_______ a. Soltation
b. Solvent c. Solution
d. Solute e. Lemme guess, it
starts with “sol”
11. When water
ionizes, it goes from a form where all of the atoms are
uncharged
to a release of H+ and OH-, meaning
_______ a. The H reduces and the OH
oxidizes b. The OH reduces and
the H oxidizes
c. Both reduce
d. Both oxidize
e. I’m never drinking water again.
12.
Lipids are generally
_______ a. Basic
b. Hydrophilic c. Hydrophobic
d. All of these e. In a bad
mood.
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. Briefly explain what a hydration shell
is.
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| 2. What are two different types of
uses for proteins? |
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| 3. Label the following chemical
reaction with the general terms for
each part – |
A
+ B
x >
C
__________
___________
______________
_____________ |
| 4. What are two different things found in
non-coding DNA that are still some type of
code? |
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| 5. What are the components
or “pieces” of lipid molecules? |
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6. What would an unsaturated
molecule have that a saturated version of the "same"
molecule would not?
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| 7. What are two sets of differences (other
than name/initials) between DNA and RNA? |
| DNA |
RNA |
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8. Briefly explain why the density of water
gets lower below 4o
C.
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| 9. Give the base sequence
for the other strand of DNA - |
_________________________________________________________
A A C T C G A T A
C T G
_________________________________________________________ |
10. What makes something a polymer?
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11. Briefly explain why the evaporation of a
liquid is a cooling process.
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| 12. What are two different
functions done by lipids in living things? |
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13. What is sectioning in the lab?
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| 14. What are the functions of
each of the two ends of an antibody molecule? |
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| 15. Draw the layers of a
cell membrane. LABEL – outside of cell, inside of cell,
hydrophobic layer, hydrophilic layer. Some labels may need to
be used twice. |
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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. Name and give a
brief description for the four levels of
protein structure. |
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2.
Give four rules from
the Cell Theory. |
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3. 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. Draw bonds yourself (include some
doubles) and practice.
O O O
O O O O
O O O
O O |
| 4. For the two basic types of
carbohydrates - |
| TYPES |
ONE BASIC USE |
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5.
Microscopes can be split into two main groups based upon either
listed feature. For each feature, name the
groups. |
Nature of the
Imaging Beam |
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Interaction of Beam
with specimen |
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| 6. What are four different types of
proteins that can be embedded in a cell
membrane? |
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| 7. Give three sets of differences
between - |
| PROKARYOTES |
EUKARYOTES |
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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.
Give a reason why there is so much N2 gas in the
atmosphere. Three Points.
What causes local ponds to “turn over”? Three Points.
What does the term pH actually stand for? Don’t define it,
explain why it’s called “pH.” Three Points.
Proteins unwind in stomach acid. What exactly is the acid
doing to make that happen? Three Points.
What are the two regional patterns often found inside
protein molecules? Three Points Each.
For Three Points each, what atomic-level materials have
been connected to aging damage? Three Points Each.
How is resolution officially measured? Three Points.
What kind of microscope only produces black-and-white
images? Three Points.
What’s wrong with the math-based explanation for cell size
limits? Three Points.
Why are a lot of technical biological terms just regular
English words? Three Points.
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