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BI 171 - Third Exam - 2009
Each question's number
is linked to the relevant part of the online book, if possible (some questions
relate to multiple sections).
Multiple Choice.
Place the letter of the choice that best answers the question on the line to the
left.
Two Points Each. NOTE: "e" answers are never the correct answer.
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1. In the lab, the salt solution introduced around the
plant cells had less water than the cytoplasm - it was
a. An isotonic solution b. A
hypotonic solution c. A hypertonic
solution d. A hydrophobic
solution e.
Um, drier-?
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2. Under what conditions do intermediate filaments
often appear?
a. Mechanical stress b. Early
cell division c. Secretion
d. Passive transport e. When
intramediate filaments just won't do
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3. Centromeres have attachment points for
a. Ribosomes b. Membranes
c. Microfilaments d. Microtubules
e. Post-It notes
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4. The turnover number applies to
a. Gene expression b. Enzyme
processing c. Active transport
d. Mitosis rate e. The cool side of
the pillow
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5. Genetic redundancy applies to
a. Crossing over and substitution mutations
b. Enzyme amplification and meiosis II
c. Allele amplification and meiosis I
d. Prokaryotes only
e. What terms I've totally forgotten
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6. ATP becoming ADP is often
a. The endergonic reaction in a coupled reaction
b. The exergonic reaction in a coupled reaction
c. Found in the hydrophobic layer of the cell membrane
d. Found in the hydrophilic layer of the cell membrane
e. Not covered by its medical insurance
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7. A membrane phospholipid has phosphate
on
a. Two of the three glycerol carbons
b. Two of the four glycerol carbons c.
One of the four glycerol carbons
d. One of the three glycerol carbons
e. A bit of the thingy near that piece
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8. Because of the way it affects cells, radiation
effects generally show up
a. In basic cell chemistry b.
Just before a cell divides c. After a
cell divides d. By just killing
the cell
e. Just when the cells have laid down for a nap
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9. When NADH loses a H+ and is temporarily NAD-,
it has become
a. Reduced
b. Activated
c. Phosphorylated
d. Oxidized
e. Much less boring
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10. Ferredoxin is needed to
a. Move microtubules during flagellar activity
b. Start DNA replication
c. Get ATP to work properly
d. Move electrons during photosynthesis
e. I remember this...I think...
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11. To establish a Q10,
you'd compare a reaction to one
a. With ten times more reactant
b. With ten times more enzyme
c. Ten degrees warmer
d. That had been running for ten minutes
e. With ten more q's in it
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12. Crossing over typically happens during
a. Interphase
b. Meiosis I
c. Meiosis II
d. Mitosis
e. The middle of a moonless night
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13. Reradiation often happens when
a. A proton leaves the atom
b. An electron jumps outward
c. A proton enters an atom
d. An electron jumps inward
e. There's radiation, but it's...ummm...re, something
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14. A limiting factor in dynamic
equilibrium is usually a
a. Reactant
b. Enzyme
c. Product d.
Rate e.
Question on the exam
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15. Dynein and kinesin function in
a. Cytokinesis
b. DNA replication
c. Swimming d.
Moving materials
e. Foreign cartoons?
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16. A basic difference between prokaryote and
eukaryote chromosomes is based on
a. How transcription happens
b. How translation happens
c. How genes are distributed
d. When they get replicated as whole units
e. Their cell-phone plans (Prokaryotes pay by the minute)
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17. Polar bodies appear during
a. Adult cell interphase b.
Sperm meiosis c. Egg cell meiosis
d. Mitosis of embryos e. A typical day
at Santa's workshop
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18. Overall,
a. Producers have more species and more biomass than consumers
b. Consumers have more species and more biomass than producers
c. Producers have more species but less biomass than consumers
d. Producers have more biomass but fewer species than consumers
e. Is this even in English anymore?
Short Answer.
Pick NINE questions to answer in the spaces provided.
NOTE: if you answer MORE than nine, only the first nine will be corrected.
Four Points each. Partial credit is possible.
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1. What is
the function of chaperonins? |
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2. What are two different adaptations
used by fresh water organisms to keep osmosis from
damaging them? |
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3. What are
two different ways that minerals contribute to the
function of enzymes? |
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4. What are two totally different uses
for carotenoids? |
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5. For a
low chromosome number (compared to a high one): |
| ADVANTAGE: |
DISADVANTAGE: |
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6. In a food chain, what happens
ultimately to most of the - |
| Matter? |
Energy? |
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7. Why does rough endoplasmic
reticulum have ribosomes on it? |
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8. What organelles probably started as
endosymbionts? |
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9. What are two different types of structures
that cells make but are technically outside of the cell membrane?
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10. Briefly describe how allosteric
end-product inhibition works. |
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11. Name four different types of
membrane proteins. |
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12. What are two ways that a living
cell can increase the flux rate at which a
material moves through the membrane? |
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14. Give the functions (not just the names)
of two different types of vacuoles. |
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15. What are two different things that should
happen only during prophase? |
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Long Answer.
Select and answer completely any four of the following
questions.
Note: if you answer more than four, only the first four will be corrected.
Seven Points Each. Partial credit is possible.
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1. Fill in the arrow-headed labels on this drawing of
eukaryote cell structures. |
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2. Give three sets of differences between
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CILIA |
FLAGELLA |
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3. Two different things that happen during
transcription in a cell. |
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| Two
different things that happen during translation in a cell.
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4. At the points labeled with the stars, attach
the appropriate labels from this list: Violet. X-Ray. InfraRed.
Red. Blue. Ultraviolet. |
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High Frequency \
Visible Range
/
Low Frequency
*
* / *
*
* \ *
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5. When enzyme activity / reaction rate
is graphed by temperature, the rate declines
on each side of an optimum. As temperature moves away from the
optimum, explain what happens on a molecular level to makes the rate
decline - |
Below the
optimum,as
the temperature drops?
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Above the
optimum, as
the temperature rises?
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6. In the graph below of
Michaelis-Menten Kinetics, explain why the curve is doing
what it's doing at each marked point, in terms of the enzyme
molecules at work. |
Along the top flat part
Reaction
Where the rising curve begins to flatten out
Rate
V
As the curve rises steeply
_____________________________________________________________
Substrate Concentration (as Enzymes remain constant) ----> |
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7. Give the name and basic function
of three enzymes involved in DNA replication |
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8. For the two steps of photosynthesis, give the
names of the steps and for each, list all of the types of energy
and/or materials input and output. |
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First Step - |
Input -
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Output -
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Second Step - |
Input -
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Output -
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Link to Answer Key
BONUS QUESTIONS.
Answer as many or as few as you wish. You can't lose points on
the rest of the exam by getting these wrong. Partial credit is possible.
Why does a progressing cancer pretty much have to reactivate its telomerase gene
expression? Three Points.
What's "wrong" with the terms intron and exon? Three Points.
Why exactly is an extra chromosome passed to an embryo very dangerous? Three
Points.
What do enzyme-mediated reactions have a different equilibrium point than the
non-enzyme version? Three Points.
The "proper" pronunciation of apoptosis is related to the pronunciation of what
other cell-related term? Three Points.
Why are mitochondrial molecular clocks preferred to nuclear molecular clocks?
Three Points.
What does cholesterol do in a cell membrane, exactly? Three Points.
What cell structure does not appear to have an official name? Three Points.
C4 photosynthesis prevents what sort of damage? Three Points.
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