Questions On Photosynthesis: Quiz!
(192).jpg "Questions On Photosynthesis: Quiz!")
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- 1.Which of these types of organisms produce the biosphere's food supply?
- A.
Autotrophs
- B.
Consumers
- C.
Heterotrophs
- 2.How does carbon dioxide enter the leaf?
- A.
Through the chloroplasts
- B.
Through the mesophyll
- C.
Through the thylakoids
- D.
Through the stomata
- E.
Through the vascular system
- 3.Cellular respiration and photosynthesis are similar in that both involve _____
- A.
The production of sugars
- B.
The release of O2 into the atmosphere
- C.
Redox reactions
- 4.The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. The oxygen comes from:
- A.
Carbon dioxide
- B.
Glucose
- C.
Light
- D.
Water
- 5.The wavelengths of light absorbed by pigments in the granum are mainly in which range?
- A.
Green, which is why plants are green
- B.
The entire spectrum of white light
- C.
Blue-violet and red-orange
- 6.Which one of the following colors is most strongly reflected by chlorophyll?
- A.
Red
- B.
Orange
- C.
Green
- D.
Yellow
- E.
Blue
- 7.When chloroplast pigments absorb light, _____.
- A.
They gain electrons
- B.
They lose electrons
- C.
Their electrons become excited
- D.
Their protons become excited
- 8.The light reactions of photosynthesis generate high-energy electrons, which end up in _____. The light reactions also produce _____ and _____.NADPH ... ATP ... oxygen.
- A.
ATP ... NADPH ... oxygen
- B.
NADPH ... ATP ... oxygen
- C.
Oxygen ... sugar ... ATP
- 9.During photosynthesis in chloroplasts, O2 is produced from _____ via a series of reactions associated with _____.
- A.
CO2 ... the water-splitting photosystem
- B.
H2O ... the water-splitting photosystem
- C.
H2O ... NADPH-producing photosystem
- 10.The _____ of photosynthesis performs a task similar to that of the _____ of cellular respiration.
- A.
NADPH ... NADH
- B.
NADP+ ... NADH
- C.
NADH ... NADPH
- 11.Both mitochondria and chloroplasts _____
- A.
Use an H+ gradient to produce ATP
- B.
Obtain electrons from water
- C.
Reduce NAD+, forming NADP
- 12.In photosynthesis, what is the fate of the oxygen atoms present in CO2? They end up _____
- A.
In sugar molecules
- B.
As O2
- C.
In sugar molecules and in water
- D.
As molecular oxygen and in sugar molecules
- 13.In an experiment, a plant was given _____ containing radioactive 18O, and the radioactive oxygen atoms were used to make sugar.
- A.
Water
- B.
Oxygen gas
- C.
Carbon dioxide
- 14.n photosynthesis, plants use carbon from _____ to make sugar and other organic molecules
- A.
Water
- B.
Chlorophyll
- C.
The sun
- D.
Carbon dioxide
- 15.The photosynthetic event known as the Calvin cycle occurs in the _____.
- A.
Stroma
- B.
nucleus
- C.
Thylakoid membrane
- D.
Stomata
- 16.The "photo-" part of the word "photosynthesis" refers to _____, whereas "-synthesis" refers to _____.
- A.
The light reactions that occur in the thylakoids ... the incorporation of carbon dioxide
- B.
The reactions in the stomata ... the reactions in the thylakoid
- C.
The Calvin cycle ... the incorporation of carbon dioxide
- 17.The Calvin cycle is a series of reactions that:
- A.
Produce NADPH
- B.
Assemble sugar molecules by incorporating carbon
- C.
Convert light energy to chemical energy
- 18.Why is NADP+ needed in photosynthesis?
- A.
It helps produce ATP from the light reactions.
- B.
It forms part of the water-splitting photosystem.
- C.
It forms NADPH to be used in the Calvin cycle.
- 19.Carbon dioxide makes up about _____ of the air we breathe.
- A.
0.03%
- B.
3.00%
- C.
0.30%
- 20.What effect does photosynthesis have on the greenhouse effect?
- A.
It increases atmospheric carbon dioxide and thus increases the greenhouse
- B.
It reduces atmospheric carbon dioxide and thus reduces greenhouse warming.
- C.
It increases atmospheric carbon dioxide and thus reduces the greenhouse effect.
Questions: 14 | Attempts: 14336 | Last updated: Jan 4, 2021
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Sample QuestionWhich of the following is a product of the Calvin cycle?
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Sample QuestionWhat is the source of light used in photosynthesis?
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Sample QuestionSunlight +6H20 + 6CO2--> C6H1206 +6O2What does the equation above represent?
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