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Post-Test
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1
Photosynthesis utilizes _____.
A)the entire electromagnetic spectrum
B)only visible light
C)radio and microwaves
D)gamma rays
2
Which of the following is only minimally absorbed by chlorophylls a and b?
A)violet light
B)green light
C)blue light
D)red light
3
The importance of photosynthesis is that photosynthetic organisms produce ____ for the biosphere.
A)CO2
B)H2O
C)organic food
D)All of these
4
The reactants of photosynthesis include all of the following except _____.
A)solar energy
B)carbohydrates
C)H2O
D)CO2
5
The oxygen given off by photosynthesis comes from ___________.
A)CO2
B)CH2O
C)H2O
D)the atmosphere
6
A solution to global warming is _____.
A)plant more shrubs and trees
B)use fewer fossil fuels
C)protect the rainforests
D)All of these
7
C4 plants fix CO2 to _____.
A)PEP
B)RuBP
C)PGA
D)oxaloacetate
8
The six-carbon molecule resulting from carbon-dioxide fixation immediately breaks down to form __________.
A)2, three-carbon PGA molecules
B)3, two-carbon PGA molecules
C)glucose
D)RuBP
9
Which correctly describes the light-independent reactions?
A)ATP is produced
B)CO2 is reduced
C)sunlight is required
D)O2 is produced
10
CO2 fixation occurs when CO2 combines with _____.
A)ribulose bisphosphate
B)gylceraldehyde -3-phosphate
C)NADP
D)glucose
11
A plant can use PGAL to make _____.
A)sucrose
B)oils
C)cellulose
D)All of the above
12
The energy and electrons needed for the reduction synthesis are supplied by _____.
A)NADPH and ATP
B)ATP only
C)CO2
D)none of these
13
The light-dependent reactions take place in the _____.
A)stroma
B)thylakoids
C)cytosol
D)cristae
14
The plant pigments, ________, absorb light in the violet-blue-green range and therefore appear shades of yellow and orange.
A)chlorophyll-a
B)carotenoids
C)chlorophyll-b
15
Photosynthetic pigments capture _____ of the solar energy that reaches the earth.
A)less than 2%
B)20%
C)50%
D)100%
16
About 20-50% of the protein content in chloroplasts is _____ which speeds up CO2 fixation.
A)glyceraldehyde-3-phosphate
B)NADPH
C)ATP
D)RuBP carboxylase
17
Five molecules of PGAL are used to produce _____ so that the Calvin cycle can continue.
A)NADPH
B)RuBP
C)glucose
D)oxaloacetate
18
In a C4 plant, the __________ cells contain chloroplasts.
A)bundle sheath
B)mesophyll
C)bundle sheath and mesophyll
D)stroma
19
C4 plants like corn and crabgrass grow better when conditions are _________.
A)cool
B)hot and dry
C)cold
20
Which of the following is NOT a product of the light-dependent reactions?
A)ATP
B)O2
C)glucose
D)NADPH







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