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SC 135 - Second Exam Fall 2010
Links connect to relevant
parts of the online book.
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 would be necessary to digest a protein?
_______ a. Dehydration synthesis
b. Cohesion c. Unsaturation
d. Hydrolysis e. The protein must sign
the papers first
2.
A gene sequence (codon) relates to an amino acid
sequence by what ratio?
_______ a. Two to one
b. Three to one
c. One to one
d. Four to one
e. They're no relation
3.
An atom that is chemically unstable has an issue
with its
_______ a. Outer electrons
b. Protons
c. Neutrons d.
Polarity
e. Meds
4. A pathway requires multiple genes because it
should always
_______ a. Produce multiple proteins
b. Move through multiple cells
c. Require multiple enzymes
d. All of these
e. Use a multiplication table
5.
In photosynthesis, the light energy is
_______ a. Changed into glucose
b. Changed into bond energy c. Breaks
glucose down d. Not actually
used
e. Tickling the plants
6.
Local ponds "turn over" due to
_______ a. Oxygen reactions in the water
b. Carbon dioxide reactions in the water
c. Water density changes
d. Effects of plants on the water
e. The pillow needs to be flipped
7. Alcohol dehydrogenase must be a
_______ a. Type of RNA
b. Protein
c. Carbohydrate
d. Lipid
e. Downer at parties
8.
Compared to a solution of pH 11, one that's a pH of 13
is
_______ a. 2/11ths more basic
b. 2/13ths more basic
c. 100 times more basic
d. 10 times more basic
e. Different in some unknowable way (well, I don't know it!)
9.
Which would be one to a few ring molecules with an oxygen
"clasp"?
_______ a. Amino acids
b. Lipids
c. Starches d.
Sugars
e. Very weird jewelry
10.
Hormones could be
_______ a. Lipids or proteins
b. Proteins or carbohydrates c. Lipids
or DNA codes d. Proteins or DNA
codes
e. The cause of most of my problems
11.
Actin and myosin would break down to
_______ a. Nucleotides
b. Sugars
c. Amino acids
d. Fatty acids
e. The right sad music
12. When a molecule oxidizes, it
_______ a. Picks up oxygen
b. Loses oxygen c. Picks up an
electron d. Loses an electron
e. Starts to dress differently
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.
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1. Ignore the specifics (don't name the actual
molecules) - label with the general terms applied to any chemical
reaction - |
C6H12O6
+ O2
enzymes >
CO2
+ H2O
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--------------- -----------------
---------------- --------------- |
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2. Plants produce 2 categories of
starches, used different ways - give each use |
VERY
STABLE
STARCHES |
LESS
STABLE
STARCHES |
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3. Why does a basic lipid have
THREE fatty acids in it? |
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4. What makes a molecule polar? |
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5. If most of our DNA is non-coding,
why is it there? Give two different things. |
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6. Why exactly is carbon dating not
usable on things over 50000 years old? |
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7. Why would sectioning be necessary? Be
fairly specific. |
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8. What are two different types of
"communication" molecules that can be proteins? |
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9. What is a hydration shell? |
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10. What is the function of each "end"
of an antibody molecule? |
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11. For each category, give an example (NOT a
definition!!) of a material that fits it - |
| HYDROPHOBIC |
HYDROPHILIC |
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12. What two major organic molecule types
must be polymers? |
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13.
A microscope's resolution - explain what that means. |
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14. What are two ways that a DNA molecule
is different from an RNA molecule? |
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15. What two features make a molecule
organic? |
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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. For three different properties of water: |
| Property: |
How produced on molecular
level: |
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2.
9.01218
Be
Beryllium
4
Column 2 |
How
many
protons? |
How
many
electrons?
(Radical form) |
How
many
neutrons? |
Typical
ion
form? |
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3. Give the name and a description
of the three types of chemical bonds: |
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4. Microscopes can be split into two main
groups based upon either listed feature. For each feature,
name the groups. |
| Nature of the
Imaging Beam |
Interaction
of Beam with specimen |
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5. Using the numbers of bonds as a guide,
fill in the symbols for either Carbon, Hydrogen, Nitrogen, or Oxygen. |
_____ _____ _____ _____
_____
_____ _____
_____ _____ _____
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6. Name and give a description of
the four levels of protein structure. |
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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.
Why are there only 2 elements on the first row of the Periodic Table? Three
Points.
How does radioactivity change what element something is? Three Points.
What is the most common free radical in our cells? Three Points.
Why is such a large fraction of the air we breathe nitrogen? Three Points.
Why is it "useful" for a toxin to be a lipid-based molecule? Three Points.
What two different behaviors are set off by ant alarmones? Two Points Each.
What, technically, does a catalyst do to speed up a reaction? Three Points.
What particular type of molecule is proving to have many different uses,
according to the latest research? Three Points.
For some electron microscope work, what do the specimens have to be coated with
(Two Points), and why (Three Points)?
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