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SCI 135 - Second Exam Fall 2018
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. A
gene is made up of
_______ a. Proteins
b. RNA c. Codons
d. Lipids e. Icky biology stuff
2. If you’re
making Kool-Aid from the powder, the powder is the
_______ a. Solution
b. Solute c. Solvent
d. Hydrater e. Stuff you
shouldn’t eat straight
3. Free
radicals are always
_______ a. Single atoms
b. Single molecules c. Charged
d. Uncharged d. Yelling on the internet
4. A molecule
that is critical in aging research is telomerase. What
class of molecule would that be?
_______ a. Lipid
b. Nucleic acid c. Protein
d. Carbohydrate e. Old?
5. Which depends
upon attractions between partial charges?
_______ a. Polar bonds
b. Covalent bonds c. Semivalent bonds
d. Hydrogen bonds
e. Not-completely committed boyfriend bonds
6. Which is most
closely connected to the resolution of a system?
_______ a. Ability to magnify
b. How it can answer a question c.
Ability of focus clearly
d. How molecules interact inside it
e. Isn’t that a New Year’s thing?
7.
Sectioning is important to
_______ a. Microscope use
b. Protein structure c. Actin & myosin
d. Molecule types
e. Selling tickets in big places
8. The defining
feature of an unsaturated lipid would be
_______ a. It’s hydrophobic
b. It’s hydrophilic c. It’s polar
d. It has double bonds
e. It’s not, um, saturated
9. Water’s
surface tension is most connected to
_______ a. Cohesion
b. Adhesion c. Heat stability
d. Evaporation e. How stressed
it’s feeling
10. Which
bonds are least likely to show up in molecules inside
cells?
_______ a. Covalent
b. Ionic c. Hydrogen
d. Double e. Savings?
11. 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 -?
12. Which
process / product in living things is
always
(not just usually) done by / with proteins?
_______ a. Structure
b. Movement c. Hormones
d. Energy supply e. Annoying the
students
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. What are two different uses
that plants have for starches that
humans can digest? |
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| 2. Give the base sequence for the
other
strand of DNA - |
______________________________________________________________
A A C
T C G A T A
C T G
________________________________________________________________ |
| 3. What are two things in
non-coding DNA that are actually types of codes? |
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| 4. What are the two basic
component molecules of a lipid? |
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| 5. What are two elements
in the air that naturally exist as
multiple-bonded molecules? |
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| 6. Label the following
chemical reaction with the general terms for
each part – |
A
+ B
x
> C
__________
___________
______________
_____________
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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. What happens when an atom or molecule gets
reduced?
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| 9. Show the basic chemical reaction
of photosynthesis. You can use chemical symbols
or chemical names. |
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10. What feature makes a molecule a
polymer?
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11. If genes code only for proteins, how do cells
make other kinds of
molecules?
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| 12. Briefly describe what happens to the
water molecules as the temperature - |
DROPS
TO
4O C (40O F) |
DROPS
FROM 4O
TO ZERO |
13. What is a hydration shell?
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14. In chemistry, what makes 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.
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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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.
O O O
O O O O
O O O
O O |
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4. What are four different types of communication-type
proteins? |
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5. For the pH scale shown below, fill
in the proper blanks - |
-------------------------------------------------------------------------------------------------
2 3 4 5 6 7
8 9 10 11 12
13
Range
Name
_____________
____________
_________________
Active
Ion
_______________
_________________ |
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6. Name and give a
brief description for the four levels of
protein structure. |
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| 7. Give two different uses in
living things for each - |
| LIPIDS |
CARBOHYDRATES |
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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.
There have been a few examples of chemistry terms that were
originally named after the element doing them, the found later to be a more
general process, done by some other elements as well. For Three Points Each,
what are they?
What body functions actually make use of oxygen radicals?
Three Points Each.
What is a material’s temperature really a measurement of?
Three Points.
What is particularly good for lakes when they turn over?
Three Points.
Where did the numbers of the pH scale come from? Three
Points.
In photosynthesis, what does the light energy get mostly
converted into? Three Points.
Why exactly does the Benedict’s test require heat? Three
Points.
Why is it important for toxins to be lipid-soluble? Three
Points.
What type of molecule are scientists running out of
abbreviations for? Three Points.
If a flu vaccine isn’t completely effective, what did the
developers do wrong? Three Points.
What happens if a living thing is just placed as-is into an
electron microscope? Three Points.
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