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SC 135 - Fourth 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. For any of the mass extinctions of the past, what was absolutely the
necessary early step?
_______ a. Make it really cold
b. Block out sunlight
c. Kill off most of the plants
d. Develop a major disease
e. Get the Department of Life to sign off on it
2. Cytokinesis happens when
_______ a. Cells divide
b. Cells migrate c. Populations
migrate d. Enzymes activate
e. People who speak Latin name things
3. When a group almost goes extinct, it
can create a
_______ a. Bottleneck effect
b. Founder effect
c. Crossing over effect
d. Temporal shift
e. Loss of friends - they're always complaining!
4. A layer of rust in ancient fossils is a marker for the rise of
_______ a. Land organisms
b. Animals c. Photosynthesis
d. Mass extinctions e. Bad
rustproofing companies
5. Embryo cells become tissues
through
_______ a. Mutation
b. Differentiation c.
Fertilization d. Activation
e. A lengthy application process
6. Which statement is about specificity?
_______ a. Cytokinesis always gives equal-sized daughter
cells
b. Heat alone can be used in chemosynthesis
c. Stomach enzymes can only work in stomach acid
d. Intestinal enzymes can digest sucrose but not Splenda
e. It specifically specifies the specialness of species
7. The "plant problem" was solved when it
was realized
_______ a. That plants could be bred artificially
b. That global warming might be slowed with plants
c. How different the early Earth was than today
d. That osmosis could not pop the cell walls
e. That plants really aren't troublemakers
8. One phase of the cell cycle largely
reverses another - what are the two?
_______ a. Interphase & metaphase
b. Telophase & prophase
c. Anaphase & metaphase
d. Interphase & telophase
e. What, can't they make up their minds?
9. Which should not come out of a
mitochondrion?
_______ a. Glucose
b. Carbon dioxide
c. ATP d.
Water e.
Music
10. Which is not a critical nutrient for plants?
_______ a. Minerals
b. Phosphates
c. Chlorophyll
d. Nitrates
e. Twizzlers
11. Evolution turns out to be changes over time in
_______ a. Cofactors
b. Metabolic pathway
c. Entropy d.
Gene pool
e. Popularity
12. The most productive part of aerobic
respiration is
_______ a. Photosynthesis
b. Electron transport chain c. Krebs
cycle d. Glycolysis
e. It iPhone app
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. What exactly happens when a protein
denatures? |
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| 2. Why would the Snowball
Period have contributed to a period of rapid evolutionary advancement? |
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3. What are two different nitrogenous wastes? |
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4. During fertilization, what goes
through fusion? |
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5. The three levels of a food chain, in
order - |
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6. For oxygen debt - |
In what
type
of tissues? |
What
is
it? |
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7. What two things are coupled in a coupled
reaction? |
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8. What happens during interphase that is
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MITOSIS
RELATED?
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NOT
MITOSIS
RELATED? |
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9. What exactly is a vitamin? |
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10. In a food chain, what ultimately happens to
most of the - |
| MATERIALS? |
ENERGY?
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| 11. Organisms
probably evolved the abilities useful for land-living while in
what two watery environments? |
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12. RNA is a good candidate as the main part of
the first "living" molecular systems. Why? |
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13. Give a definition for each - |
CENTRIOLE -
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CENTROMERE -
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14. What are two different ways that niche
isolation happens? |
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15. The two main uses for glucose in
plants - |
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16. For a cell plate - |
Where & when
would one be
found? |
What is
it?
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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. Describe how the two types of indirect
(noncompetitive) enzyme inhibitions work. |
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2. For each step in the theoretical
development of Life on Earth, put them in chronological order,
from earliest to latest, 1 - 8 in the boxes to the left. |
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Photosynthesis |
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Molecular
Competition |
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Aerobic
Respiration |
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Prokaryote
Cells |
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Cambrian
Explosion |
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Primordial
Soup |
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Movement onto
Land |
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Multicelled
Systems |
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3. For the main photosynthesis reactions: |
| Name:
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Materials or
Energy Used |
Materials
Produced |
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4. According to the Hardy-Weinberg rules,
what has to be true about a population for there to be NO change
in allele frequencies over time? |
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5. What are four different things that make the
process of meiosis different from the process of mitosis? |
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6. At the points labeled with the stars, attach
the appropriate labels from this list: Violet. X-Ray. InfraRed.
Red. Blue. Ultraviolet. |
High Frequency
\
Visible Range
/
Low Frequency
*
* / *
*
* \ *
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7. What are four different ways that
anaerobic organisms impact humans? |
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8. Answer the questions on the graph for
the relationship between enzyme activity and temperature. A. Why
is the rate dropping off here? B. What is this point
called? C. Why is the rate rising here? |
*
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Reaction
C
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* A
Rate
*
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*****
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B
Increasing Temperature —> |
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.
Under what conditions can four different mitosis phases look the same? Three
Points.
What type of organisms have been found to be mechanically isolated? Three
Points.
Life seems to break the 2nd Law of Thermodynamics - why doesn't it? Three
Points.
What sort of substances are often irreversible enzyme competitors? Three Points.
Why did the first scientists that dove to hydrothermal vents want to look at
them? Three Points.
Why do lipids have so many Calories? Three Points.
Why don't biologists like the "poof" explanations for the origins of Life? Three
Points.
What's the "wackier" version of panspermia? Three Points.
There may still be ancient, non-cellular Life around - what is it? Three Points.
What symbionts are critical to the success of land plants (Two Points), and what
do they do? (Three Points)
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