Chapter 10 Bio

25 July 2022
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question
Every ecosystem must have _____.
answer
autotrophs
question
Plants are photoautotrophs. What does this mean?
answer
They use light energy to drive the synthesis of organic molecules from inorganic materials.
question
When oxygen is released as a result of photosynthesis, it is a direct by-product of _____.
answer
splitting water molecules
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The final electron acceptor associated with photosystem I is _____.
answer
NADP
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Carbon dioxide is split to form oxygen gas and carbon compounds _____.
answer
in neither photosynthesis nor respiration
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Which of the following is a product of the light reactions of photosynthesis?
answer
oxygen, ATP, and NADPH
question
In autumn, the leaves of deciduous trees change colors. This is because chlorophyll is degraded and _____.
answer
carotenoids and other pigments are still present in the leaves
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The overall function of the Calvin cycle is _____.
answer
making sugar
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Where does the Calvin cycle take place?
answer
stroma of the chloroplast
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The light reactions of photosynthesis supply the Calvin cycle with
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ATP and NADPH.
question
Which of the following sequences correctly represents the flow of electrons during photosynthesis?
answer
H2O ā†’ NADPH ā†’ Calvin cycle
question
Which of the following statements is a correct distinction between autotrophs and heterotrophs?
answer
Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic.
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Which of the following does not occur during the Calvin cycle?
answer
release of oxygen
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In mechanism, photophosphorylation is most similar to
answer
oxidative phosphorylation in cellular respiration.
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Which process is most directly driven by light energy?
answer
removal of electrons from chlorophyll molecules
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Select the correct molecule that is the main product of the Calvin cycle.
answer
G3P
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What is the basic role of CO2 in photosynthesis?
answer
CO2 is fixed or incorporated into organic molecules.
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Select the most accurate statement describing the basic function of the light reactions of photosynthesis.
answer
The basic function of the light reactions of photosynthesis is the conversion of solar energy to chemical energy.
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Select the correct statement about the Calvin cycle.
answer
The Calvin cycle has three phases: carbon fixation, reduction, and regeneration of RuBP.
question
Why are plants classified as producers?
answer
Plants are classified as producers because they fix inorganic carbon into organic molecules.