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46 terms

Chapter Ten

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What is the net input for light reactions?
Light, water, ADP, and NADP+
What is the net output for light reactions?
ATP, O2 and NADPH
What is the net input for the Calvin cycle?
CO2, ATP and NADPH
What is the net output of the Calvin cycle?
G3P, ADP and NADP+
In the light reactions, light energy is used to oxidize ______ to ______.
H2O and O2
The electrons derived from this oxidation reaction in the light reactions are used to reduce ____ to _____.
NADP+ and NADPH
The Calvin cycle oxidizes the light reactions product ______ to NADP+
NADPH to NADP+
The electrons derived from this oxidation reaction in the Calvin cycle are used to reduce ______ to ______..
CO2 to G3P.
What occurs solely in Photosystem II only?
Reduction of electron transport chain between the two photosystems and the oxidation of water.
What occurs only in Photosystem I only?
Oxidation of electron transport chain between the two photosystems and the reduction of NADP+
What occurs in both Photosystems II and I.
Light absorption and the reduction of primary electron acceptor.
In PS II, what is oxidized?
P680?
In PS I, what is oxidized?
P700
Which of these equations best summarizes photosynthesis?
6CO2+6H2O----->C6H12O6+6H2O
Where does the Calvin cycle occur?
The Calvin cycle occurs in the stroma.
The light reactions of photosynthesis use _____ and produce _____.
Water and NADPH.
Carbon fixation involves the addition of carbon dioxide to _____.
RuBP
After 3-PGA is phosphorylated, it is reduced by _____.
NADPH
How many carbon dioxide molecules must be added to RuBP to make a single molecule of glucose?
Six
In the Calvin cycle, how many ATP molecules are required to regenerate RuBP from five G3P molecules?
Three
Which term describes ATP production resulting from the capture of light energy by chlorophyll?
Photophosphorylation
True or false? The chemiosmotic hypothesis states that the synthesis of ATP generates a proton gradient that leads to electron flow through an electron transport chain.
False
According to the chemiosmotic hypothesis, what provides the energy that directly drives ATP synthesis?
Proton Gradient
Which of the following particles can pass through the ATP synthase channel?
Protons
True or false? The region of ATP synthase that catalyzes the production of ATP from ADP and inorganic phosphate spans the chloroplast membrane.
False
_____ has a longer wavelength than _____.
Red..... green
Which process produces oxygen?
Photosynthesis
Which set of reactions uses H2O and produces O2?
The light-dependent reactions
True or false? The light-dependent reactions of photosynthesis use water and produce oxygen.
True
Which of the following molecules is the primary product of photosystem I?
NADPH
What is the biological significance of the light-independent reactions of photosynthesis?
They convert carbon dioxide to sugar.
Which of the following reactions ensures that the Calvin cycle can make a continuous supply of glucose?
Regeneration of RuBP
In C3 plants the conservation of water promotes _____.
Photorespiration
In C4 and CAM plants carbon dioxide is fixed in the _____ of mesophyll cells.
Cytoplasm
C4 plants differ from C3 and CAM plants in that C4 plants _____.
Transfer fixed carbon dioxide to cells in which the Calvin cycle occurs.
The light reactions of photosynthesis supply the Calvin cycle with what?
ATP and NADPH
Which of the following sequences correctly represents the flow of electrons during photosynthesis?
H2O---->NADPH----> Calvin cycle
How is photosynthesis similar in C4 plants and CAM plants?
In both cases, rubisco is not used to fix carbon initially.
Which of the following statements is a correct distinction between autotrophs and heterotrophs?
Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic.
Which of the following does not occur during the Calvin cycle?
Release of Oxygen
In mechanism, photophosphorylation is most similar to
Oxidative phosphorylation in cellular respiration
Which process is most directly driven by light energy?
Removal of electrons from chlorophyll molecules
What is the molecule that is the main product of the Calvin cycle.
G3P
What is the basic role of CO2 in photosynthesis?
CO2 is fixed or incorporated into organic molecules.
True or False: The Calvin cycle has three phases: carbon fixation, reduction, and regeneration of RuBP.
True
Why are plants classified as producers?
Plants are classified as producers because they fix inorganic carbon into organic molecules.