Transcript File

Unit 3A Photosynthesis
Review
1. Which of the following chemical
equations represents
photosynthesis?
A. Carbon dioxide plus water yields glucose
(sugar) and oxygen.
B. Oxygen plus carbon dioxide yields water
and glucose.
C. Glucose plus oxygen yields carbon
dioxide and water.
D. Water plus glucose yields oxygen and
carbon dioxide.
2. C6H12O6 is the formula for
A.
B.
C.
D.
Carbon dioxide
oxygen
glucose
sucrose
3. A green pigment that traps
energy from the sunlight, and is
essential for photosynthesis is
A.
B.
C.
D.
The mitochondria
The chloroplast
The nucleus
The chlorophyll
4. In an experiment, the variable
that YOU directly change is called
the
A.
B.
C.
D.
control
Independent variable
constant
Dependent variable
5. The Calvin cycle is a series of
reactions that use carbon dioxide to
form carbohydrates. Another name
for the Calvin cycle, which is also
called the 2nd phase of
photosynthesis, is called the
A.
B.
C.
D.
Light-dependent reactions
Light-independent reactions
Cellular respiration
Fermentation
6. Leaves appear green because
the green portion of the light that
strikes them is
A.
B.
C.
D.
Destroyed
Changed to heat
Absorbed
Reflected
7. If photosynthesis suddenly
stops, what might happen to
Earth’s atmosphere?
A.
B.
C.
D.
Carbon dioxide would suddenly increase.
Oxygen would suddenly decrease.
None of the above.
A&B
8. In an experiment conducted to determine
whether the green plants take in CO2, a biologist
filled a large beaker with aquarium water to which
she added bromothymol blue. She exhaled CO2
into the solution of bromothymol blue, which made
the solution turn yellow. Then she placed a sprig of
Elodea into the two test tubes. She left a third test
tube without Elodea to serve as a control. She
added the yellow bromothymol solution to all three
test tubes and placed a stopper in each. Next, she
placed all the test tubes in sunlight. After several
hours in sunlight, the bromothymol solution in the
test tubes with the Elodea turned blue. The
bromothymol solution in the control remained
yellow. What conclusion can be drawn from the
experiment? Explain.