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Biology Exam 3

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Jul 12th, 2023
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43 test answers
question
Plants are photoautotrophs. What does this mean?
answer
They use light energy to drive the synthesis of organic molecules from inorganic materials.
question
Which of these phosphorylates ADP to make ATP?
answer
E
question
_____ releases energy that is used to pump hydrogen ions from the stroma into the thylakoid compartment.
answer
B
question
_____ splits water into 1/2 O2, H+, and e- .
answer
A
question
Energized electrons from ____ enter an electron transport chain and are then used to reduce NADP+
answer
C
question
Chlorophyll can be found in _____.
answer
A and C
question
Which of the following is a product of the light reactions of photosynthesis?
answer
Oxygen, ATP, and NADPH
question
Inputs of the Light Reaction:
answer
NADP+, Water, ADP, Light
question
Outputs of the Light Reaction:
answer
NADPH, O2, ATP
question
Inputs of the Calvin Cycle:
answer
CO2, ATP, NADPH
question
Output of the Calvin Cycle:
answer
ADP, G3P, NADP+
question
In the light reactions, light energy is used to oxidize ______ to _______.
answer
H2O; O2
question
The electrons derived from this oxidation reaction in the light reactions are used to reduce _________ to _________.
answer
NADP+; NADPH
question
The Calvin cycle oxidizes the light-reactions product ________ to ________.
answer
NADPH; NADP+
question
The electrons derived from this oxidation reaction in the Calvin cycle are used to reduce _________ to _________.
answer
CO2; G3P
question
The overall function of the Calvin cycle is _____.
answer
making sugar
question
The ultimate source of energy to support most life on Earth is _____.
answer
sunlight
question
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
answer
ATP and NADPH
question
Where does the Calvin cycle take place?
answer
stroma of the chloroplast
question
What is the primary function of the Calvin cycle?
answer
synthesize simple sugar from carbon dioxide
question
Which of these equations best summarizes photosynthesis?
answer
6 CO2 + 6 H2O → C6H12O6 + 6 O2
question
Where does the Calvin cycle occur?
answer
E
question
The light reactions of photosynthesis use _____ and produce _____.
answer
water; NADPH
question
Which term describes ATP production resulting from the capture of light energy by chlorophyll?
answer
Photophosphorylation
question
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.
answer
False
question
According to the chemiosmotic hypothesis, what provides the energy that directly drives ATP synthesis?
answer
Proton gradient
question
Which of the following particles can pass through the ATP synthase channel?
answer
Protons
question
True or false? The region of ATP synthase that catalyzes the production of ATP from ADP and inorganic phosphate spans the chloroplast membrane.
answer
False
question
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?
answer
ATP will not be produced because there is no ADP and inorganic phosphate in the solution.
question
Which of the following statements best describes the relationship between photosynthesis and respiration?
answer
Photosynthesis stores energy in complex organic molecules; respiration releases energy from complex organic molecules
question
Which process produces oxygen?
answer
Photosynthesis
question
Which set of reactions uses H2O and produces O2?
answer
The light-dependent reactions
question
What is the importance of the light-independent reactions in terms of carbon flow in the biosphere?
answer
The light-independent reactions turn CO2, a gas, into usable carbon in the form of sugars.
question
True or false? The light-dependent reactions of photosynthesis use water and produce oxygen.
answer
True
question
Which of the following molecules is the primary product of photosystem I?
answer
NADPH
question
What is the biological significance of the light-independent reactions of photosynthesis?
answer
They convert carbon dioxide to sugar.
question
Which of the following statements best describes the relationship between the light-dependent and light-independent reactions of photosynthesis?
answer
The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions.
question
Which of the following reactions ensures that the Calvin cycle can make a continuous supply of glucose?
answer
Regneration of RuBP
question
When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by _____.
answer
Splitting Water-The electrons removed from water are transferred to P680.
question
In the electromagnetic spectrum, the type of radiation that we call visible light occurs between _____.
answer
ultraviolet radiation and infrared radiation -Visible light is a narrow band of the electromagnetic spectrum that lies between ultraviolet radiation and infrared radiation.
question
The final electron acceptor associated with photosystem I is _____.
answer
NADP
question
The photosynthetic membranes are found in the _____ in plant cells.
answer
Chloroplasts-An elaborate system of interconnected thylakoid membranes segregates the stroma from the thylakoid space in the chloroplast.
question
Which of the following products of the light reactions of photosynthesis is consumed during the Calvin cycle?
answer
NADPH-During the Calvin cycle electrons stored in NADPH are used to reduce carbon.
1 of 43
question
Plants are photoautotrophs. What does this mean?
answer
They use light energy to drive the synthesis of organic molecules from inorganic materials.
question
Which of these phosphorylates ADP to make ATP?
answer
E
question
_____ releases energy that is used to pump hydrogen ions from the stroma into the thylakoid compartment.
answer
B
question
_____ splits water into 1/2 O2, H+, and e- .
answer
A
question
Energized electrons from ____ enter an electron transport chain and are then used to reduce NADP+
answer
C
question
Chlorophyll can be found in _____.
answer
A and C
question
Which of the following is a product of the light reactions of photosynthesis?
answer
Oxygen, ATP, and NADPH
question
Inputs of the Light Reaction:
answer
NADP+, Water, ADP, Light
question
Outputs of the Light Reaction:
answer
NADPH, O2, ATP
question
Inputs of the Calvin Cycle:
answer
CO2, ATP, NADPH
question
Output of the Calvin Cycle:
answer
ADP, G3P, NADP+
question
In the light reactions, light energy is used to oxidize ______ to _______.
answer
H2O; O2
question
The electrons derived from this oxidation reaction in the light reactions are used to reduce _________ to _________.
answer
NADP+; NADPH
question
The Calvin cycle oxidizes the light-reactions product ________ to ________.
answer
NADPH; NADP+
question
The electrons derived from this oxidation reaction in the Calvin cycle are used to reduce _________ to _________.
answer
CO2; G3P
question
The overall function of the Calvin cycle is _____.
answer
making sugar
question
The ultimate source of energy to support most life on Earth is _____.
answer
sunlight
question
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
answer
ATP and NADPH
question
Where does the Calvin cycle take place?
answer
stroma of the chloroplast
question
What is the primary function of the Calvin cycle?
answer
synthesize simple sugar from carbon dioxide
question
Which of these equations best summarizes photosynthesis?
answer
6 CO2 + 6 H2O → C6H12O6 + 6 O2
question
Where does the Calvin cycle occur?
answer
E
question
The light reactions of photosynthesis use _____ and produce _____.
answer
water; NADPH
question
Which term describes ATP production resulting from the capture of light energy by chlorophyll?
answer
Photophosphorylation
question
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.
answer
False
question
According to the chemiosmotic hypothesis, what provides the energy that directly drives ATP synthesis?
answer
Proton gradient
question
Which of the following particles can pass through the ATP synthase channel?
answer
Protons
question
True or false? The region of ATP synthase that catalyzes the production of ATP from ADP and inorganic phosphate spans the chloroplast membrane.
answer
False
question
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?
answer
ATP will not be produced because there is no ADP and inorganic phosphate in the solution.
question
Which of the following statements best describes the relationship between photosynthesis and respiration?
answer
Photosynthesis stores energy in complex organic molecules; respiration releases energy from complex organic molecules
question
Which process produces oxygen?
answer
Photosynthesis
question
Which set of reactions uses H2O and produces O2?
answer
The light-dependent reactions
question
What is the importance of the light-independent reactions in terms of carbon flow in the biosphere?
answer
The light-independent reactions turn CO2, a gas, into usable carbon in the form of sugars.
question
True or false? The light-dependent reactions of photosynthesis use water and produce oxygen.
answer
True
question
Which of the following molecules is the primary product of photosystem I?
answer
NADPH
question
What is the biological significance of the light-independent reactions of photosynthesis?
answer
They convert carbon dioxide to sugar.
question
Which of the following statements best describes the relationship between the light-dependent and light-independent reactions of photosynthesis?
answer
The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions.
question
Which of the following reactions ensures that the Calvin cycle can make a continuous supply of glucose?
answer
Regneration of RuBP
question
When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by _____.
answer
Splitting Water-The electrons removed from water are transferred to P680.
question
In the electromagnetic spectrum, the type of radiation that we call visible light occurs between _____.
answer
ultraviolet radiation and infrared radiation -Visible light is a narrow band of the electromagnetic spectrum that lies between ultraviolet radiation and infrared radiation.
question
The final electron acceptor associated with photosystem I is _____.
answer
NADP
question
The photosynthetic membranes are found in the _____ in plant cells.
answer
Chloroplasts-An elaborate system of interconnected thylakoid membranes segregates the stroma from the thylakoid space in the chloroplast.
question
Which of the following products of the light reactions of photosynthesis is consumed during the Calvin cycle?
answer
NADPH-During the Calvin cycle electrons stored in NADPH are used to reduce carbon.