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94' SBIOA Exam
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Exam Part A: M/C Part B: Short Answers Part C: Essay Question 94 Exam 95
Exam 97
Exam
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Part A: Multiple Choices(con't) Page
1 Page
2 Page
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21.
A carrot
plant is exposed to carbon dioxide containing radioactive carbon for 24 hours. After this exposure,
the carrot roots are found to have accumulated radioactivity. These
carrots are then fed to a rabbit. One week later, the rabbit's
tissue is tested for radioactivity and is found
to have a higher than normal background count.
b.
water
c.
mineral
d.
carbon
e.
nitrogen 22.
The
rate of growth of a natural population
a.
always reaches the carrying capacity of the ecosystem.
b.
when graphed, always has a positive slope.
c.
is limited by the carrying capacity of the ecosystem.
d.
is calculated by subtracting death rate from birth rate.
e.
exceeds the death rate and rate of emigration. 23.
Passive
transport is the movement of materials across a cell membrane caused by
a.
random molecular or ionic motion.
b.
electrical attraction.
c.
carrier molecules.
d.
active transport.
e.
solvent pressure. 24.
Identical
cylinders were cut from a living potato, and placed into distilled water
and salt solutions of varying concentrations. A control cylinder
was kept in potato juice. The cylinder whose turgor remained the same as
in the fresh potato juice was in
a.
an isotonic solution.
b.
a saturated solution.
c.
a hypertonic solution.
d.
distilled water.
e.
a hypotonic solution. 25.
A system
in which potassium ions moved from cytoplasm containing a low
concentration of ions into a vacuole with a higher concentration of
potassium ions would be an example of
a.
osmosis.
b.
active transport.
c.
diffusion.
d.
passive transport.
e.
pinocytosis. 26.
The
process of phagocytosis involves the passage of
a.
solid wastes out of the cell.
b.
solid particles into the cell.
c.
liquid wastes out of the cell.
d.
water into the cell.
e.
ions of solutes into the cell. 27.
`Free
energy' is
a.
energy that can do useful work.
b.
energy which is released in every chemical reaction.
c.
energy released during endergonic reactions.
d.
the total energy involved in a chemical reaction.
e.
heat energy. 28.
The
second law of thermodynamics states that as entropy increases, free
energy
a.
remains constant.
b.
decreases.
c.
depends on the chemical reaction involved.
d.
varies inversely with the absolute temperature.
e.
is released as heat energy. 29.
A
chemical reaction will occur spontaneously if
a.
entropy decreases and enthalpy increases.
b.
entropy increases and enthalpy decreases.
c.
change in entropy equals change in enthalpy.
d.
both entropy and enthalpy decrease.
e.
both entropy and enthalpy increase. 30.
The
process which converts chemical potential energy into a form which can
be used by cells is called
a.
translocation.
b.
anabolism.
c.
catabolism.
d.
transpiration.
e.
transcription.
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