Plants are photoautotrophs. What does this mean?
They use light energy to drive the synthesis of organic molecules from inorganic materials.
Which of these phosphorylates ADP to make ATP?
E
_____ releases energy that is used to pump hydrogen ions from the stroma into the thylakoid compartment.
B
_____ splits water into 1/2 O2, H+, and e- .
A
Energized electrons from ____ enter an electron transport chain and are then used to reduce NADP+
C
Chlorophyll can be found in _____.
A and C
Which of the following is a product of the light reactions of photosynthesis?
Oxygen, ATP, and NADPH
Inputs of the Light Reaction:
NADP+, Water, ADP, Light
Outputs of the Light Reaction:
NADPH, O2, ATP
Inputs of the Calvin Cycle:
CO2, ATP, NADPH
Output of the Calvin Cycle:
ADP, G3P, NADP+
In the light reactions, light energy is used to oxidize ______ to _______.
H2O; O2
The electrons derived from this oxidation reaction in the light reactions are used to reduce _________ to _________.
NADP+; NADPH
The Calvin cycle oxidizes the light-reactions product ________ to ________.
NADPH; NADP+
The electrons derived from this oxidation reaction in the Calvin cycle are used to reduce _________ to _________.
CO2; G3P
The overall function of the Calvin cycle is _____.
making sugar
The ultimate source of energy to support most life on Earth is _____.
sunlight
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
ATP and NADPH
Where does the Calvin cycle take place?
stroma of the chloroplast
What is the primary function of the Calvin cycle?
synthesize simple sugar from carbon dioxide
Which of these equations best summarizes photosynthesis?
6 CO2 + 6 H2O > C6H12O6 + 6 O2
Where does the Calvin cycle occur?
E
The light reactions of photosynthesis use _____ and produce _____.
water; NADPH
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
Chloroplast membrane vesicles are equilibrated in a simple solution of pH 5? . The solution is then adjusted to pH 8? . Which of the following conclusions can be drawn from these experimental conditions?
ATP will not be produced because there is no ADP and inorganic phosphate in the solution.
Which of the following statements best describes the relationship between photosynthesis and respiration?
Photosynthesis stores energy in complex organic molecules; respiration releases energy from complex organic molecules
Which process produces oxygen?
Photosynthesis
Which set of reactions uses H2O and produces O2?
The light-dependent reactions
What is the importance of the light-independent reactions in terms of carbon flow in the biosphere?
The light-independent reactions turn CO2, a gas, into usable carbon in the form of sugars.
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 statements best describes the relationship between the light-dependent and light-independent reactions of photosynthesis?
The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions.
Which of the following reactions ensures that the Calvin cycle can make a continuous supply of glucose?
Regneration of RuBP
When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by _____.
Splitting Water
-The electrons removed from water are transferred to P680.
In the electromagnetic spectrum, the type of radiation that we call visible light occurs between _____.
ultraviolet radiation and infrared radiation
-Visible light is a narrow band of the electromagnetic spectrum that lies between ultraviolet radiation and infrared radiation.
The final electron acceptor associated with photosystem I is _____.
NADP
The photosynthetic membranes are found in the _____ in plant cells.
Chloroplasts
-An elaborate system of interconnected thylakoid membranes segregates the stroma from the thylakoid space in the chloroplast.
Which of the following products of the light reactions of photosynthesis is consumed during the Calvin cycle?
NADPH
-During the Calvin cycle electrons stored in NADPH are used to reduce carbon.
x

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