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SCI 135 - Second Exam Fall 2016
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.
A solution with a pH of 10 is
__________ a. Twice as acidic as a pH 9 solution
b. Ten times as acidic as a pH 9 solution
c. Twice as basic as a pH 9 solution
d. Ten times as basic as a pH 9 solution
e. Is that a term or a cat spitting?
2.
Which is most likely to have a stable ion with
a +2 charge?
__________ a. Phosphorus, from Column 5
b. Barium, from Column 2
c. Selenium, from Column 7
d. Krypton, from Column 8
e. Is it too late to take basket-weaving instead...?
3.
In the immune system
_______ a. Antibodies
are made to attach to antigens b.
Antibiotics are made to attach to antigens
c. Antigens are made to attach to antibodies
d. Antigens are made to attach to antibiotics
e. Are there any “a” words left?
4. During
a step in nerve cell function, sodium ions move from inside the
cell to where there are
more of them just outside the membrane. The process would be
_______ a. Passive
transport
b. Facilitated diffusion
c. Active transport
d. Neurotransmission
e. Pretty boring to watch all day
5.
The most important measure
for a microscope is
_______ a. Maximum
magnification b. Resolution
c. Reproducibility d. Imaging
limit
e. Can I do it on my phone?
6.
Which is true about polar
molecules? It must have...
__________ a. Opposite charges at each end
b. At least one partial charge c. At
least two full charges
d. At least one double bond
e. Heard at least one joke about being cold
7. Microtubules, the driving force of flagella
movement, are made up of
__________ a. Carbohydrate
b. Lipid c. Nucleic Acid
d. Protein e. Little tiny
tube-thingies
8.
Which could probably be found embedded in a cell’s
outer membrane?
__________ a. Transfer RNA
b. Pore proteins c. Microtubules
d. Ribosomes
e. Bugs that hit the windshield
9.
When molecules are saturated,
what are they saturated with?
_______ a. Water
b. Membranes c. Hydrogen atoms
d. Proteins e. Sadness. Sadness
saturation.
10.
Lactase is used to digest, or break down,
molecules of lactose, so it would be
__________ a. A carbohydrate involved in dehydration
synthesis
b. A protein involved in dehydration synthesis
c. A protein involved in hydrolysis
d. A carbohydrate involved in hydrolysis
e. Asking two things at once? Stop it, just stop it!
11. The limiting force on root pressure is
_______ a. Gravity
b. Transpiration c. Diffusion
d. Air pressure
e. Roots have pressure? Are their jobs stressful?
12. Water is most dense at
what Celsius temperature?
_______ a. 0o
b. 100 o
c. 4 o
d. 12 o
e. …and students are most dense at classroom temperature
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. Given here is one side (strand) of DNA.
Starting with this strand, show: |
Starting__________________________________________________________________________________
Strand
A A T C
G A C C T A
T C T C A A
T C T G C
____________________________________________________________________________________
Other DNA strand |
2. What purpose is served by
microvilli?
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3. Give
two sets of differences between the
cells of - |
| PROKARYOTES |
EUKARYOTES |
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4. Several general classes of important organic
molecules are polymers. What are two? |
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5. What is a hydration shell?
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6. What are two ways that cilia and flagella
are similar? |
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7. Lipid molecules are constructed
from two basic parts. What are these molecule subunits? |
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8. Label the following chemical reaction
with the general terms for each part – |
A
+
B
x
>
C
__________
___________
______________
_____________
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9. What
are two Kingdoms where virtually every
species has a cell wall? |
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10. What, technically, is a gene?
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11.
Give two sets of differences between the
chromosomes of - |
| PROKARYOTES |
EUKARYOTES |
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12. Cell membranes are selectively
permeable. What does that mean?
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13. What are two general types of proteins
that can be considered signalling or communication molecules? |
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14. In the lab, what is sectioning?
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15.
Limitations on cell size are connected to the
surface-to-volume ratio as cells get larger. Why
does a cell need a certain amount of surface for its volume?
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16. Non-coding DNA is actually a lot of
different things. What are two? |
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17. What are two different types of uses
that organisms get from lipids? |
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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. Using the numbers of bonds as a guide, fill in the
symbols for either Carbon, Hydrogen, Nitrogen, or Oxygen. |
| Not
reproducible, but count how many bonds are on each box or circle... |
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2. Name and give a brief
description for the four levels of protein structure. |
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3. For carbohydrates - |
Process that makes
most of them - |
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Two main
forms - |
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Organisms that make
them - |
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4.
Give four rules from the Cell Theory. |
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5. What are three different
ways that fresh-water organisms deal with
osmosis?
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6. 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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7. Give three sets of
differences between - |
| FLAGELLA |
CILIA |
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Key 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 almost no ionic bonds in living cells?
People use antioxidants to counteract free radicals. What
systems need those radicals to function properly? Three Points each.
Why would plants make starches that are not maximally
stable? Three Points
How does the defense behavior of fire ants differ from most
other ant species? Three Points.
The protein actin found in an ameba is almost identical to
the actin in humans. Why? Three Points.
Cocaine has an effect on what type of proteins? Three
Points.
One subtype of molecule used to be thought to have just two
versions and uses, but recently so many have been found that they’re hard to
name. What’s the subtype? Three Points.
What problem needed to be overcome to get really powerful
magnifying lenses? Three Points.
What are dangerous about plasmids? Three Points.
Activating what cell structure transforms “regular” cancer
cells into malignant cancers? Three Points.
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