Understand light dependent reactions - AP Biology
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What is the first step in photosynthesis?
What is the first step in photosynthesis?
Photosynthesis begins with energy from light being converted to chemical energy. The only answer explanation accurately explaining this process describes the conversion of light energy (photons) to chemical energy (excited electrons).
Photons present in light strike and excite electrons in chlorophyll.
The photons are highly energized light particles, which strike chlorophyll and excite and free electrons in the chlorophyll molecule. These excited electrons pass through the electron transport chain and their energy is collected to make ATP.
Photosynthesis begins with energy from light being converted to chemical energy. The only answer explanation accurately explaining this process describes the conversion of light energy (photons) to chemical energy (excited electrons).
Photons present in light strike and excite electrons in chlorophyll.
The photons are highly energized light particles, which strike chlorophyll and excite and free electrons in the chlorophyll molecule. These excited electrons pass through the electron transport chain and their energy is collected to make ATP.
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The light reactions of photosynthesis are responsible for the production of which of the following molecules?
The light reactions of photosynthesis are responsible for the production of which of the following molecules?
The light reactions are the steps of the photosynthesis that function to convert solar energy into chemical energy that can be used during the Calvin cycle. The light reactions use solar energy to reduce 
to 
and to convert 
to 
.
The light reactions are the steps of the photosynthesis that function to convert solar energy into chemical energy that can be used during the Calvin cycle. The light reactions use solar energy to reduce
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Which of the following is a by-product of the light reactions in photosynthesis?
Which of the following is a by-product of the light reactions in photosynthesis?
During the light reactions water is split and the by-product is oxygen. Oxygen is then released back into the atmosphere. Sugars are produced during the Calvin cycle and are not a direct product of the light reactions.
During the light reactions water is split and the by-product is oxygen. Oxygen is then released back into the atmosphere. Sugars are produced during the Calvin cycle and are not a direct product of the light reactions.
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Where do the light reactions of photosynthesis occur?
Where do the light reactions of photosynthesis occur?
The light reactions of photosynthesis occur in the thylakoid membranes inside of chloroplasts in plant cells. Photosynthesis depends on the buildup of a proton gradient across a membrane to generate ATP. The thylakoid is an organelle present only in plants. The phospholipid bilayer and cell wall surround plant cells, and are not involved in photosynthesis.
The light reactions of photosynthesis occur in the thylakoid membranes inside of chloroplasts in plant cells. Photosynthesis depends on the buildup of a proton gradient across a membrane to generate ATP. The thylakoid is an organelle present only in plants. The phospholipid bilayer and cell wall surround plant cells, and are not involved in photosynthesis.
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When a molecule of NAD⁺ gains a hydrogen atom, the molecule becomes?
When a molecule of NAD⁺ gains a hydrogen atom, the molecule becomes?
The molecule is reduced because when a molecule gains an electron, it is said to be reduced. The answer oxidized would have been chosen if the molecule lost an electron. Plasmolysis has nothing to do with the gain or loss of an electron, and the term redoxed does not fit into this question. Hydrolysis is when a bond is broken using water, so that is incorrect as well.
The molecule is reduced because when a molecule gains an electron, it is said to be reduced. The answer oxidized would have been chosen if the molecule lost an electron. Plasmolysis has nothing to do with the gain or loss of an electron, and the term redoxed does not fit into this question. Hydrolysis is when a bond is broken using water, so that is incorrect as well.
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What is the purpose of the light dependent reaction?
What is the purpose of the light dependent reaction?
The light dependent reaction converts solar energy to chemical energy, using the photosystem to capture light energy, and ultimately produce ATP and NADPH. Pigment molecules in the photosystem absorb photons of light, which then reach the chlorophyll, exciting electrons in the chlorophyll. The excited electron then is transferred to a primary electron acceptor of the electron transport chain (and is replaced by the splitting of water (to produce O2, H+ and e-)).
The light dependent reaction converts solar energy to chemical energy, using the photosystem to capture light energy, and ultimately produce ATP and NADPH. Pigment molecules in the photosystem absorb photons of light, which then reach the chlorophyll, exciting electrons in the chlorophyll. The excited electron then is transferred to a primary electron acceptor of the electron transport chain (and is replaced by the splitting of water (to produce O2, H+ and e-)).
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During the light dependent reaction, what is the purpose of creating a proton gradient in the thylakoid lumen?
During the light dependent reaction, what is the purpose of creating a proton gradient in the thylakoid lumen?
The ATP synthase protein is embedded in the thylakoid membrane. When sunlight is captured by photosystem II in the light dependent reaction, water is split, producing O2 and 2 H+ ions and 2 electrons. As the electrons flow down the electron transport chain, this energy is used to pump hydrogen ions from the stroma into the thylakoid space, producing a high concentration of hydrogen ions inside the thylakoid lumen. Eventually, the hydrogen ions then flow from the area of high concentration (in the thylakoid lumen) to an area of low concentration (in the stroma ), through the ATP synthase protein. The movement of the hydrogen ions through this structure combines ADP with phosphate, producing ATP.
The ATP synthase protein is embedded in the thylakoid membrane. When sunlight is captured by photosystem II in the light dependent reaction, water is split, producing O2 and 2 H+ ions and 2 electrons. As the electrons flow down the electron transport chain, this energy is used to pump hydrogen ions from the stroma into the thylakoid space, producing a high concentration of hydrogen ions inside the thylakoid lumen. Eventually, the hydrogen ions then flow from the area of high concentration (in the thylakoid lumen) to an area of low concentration (in the stroma ), through the ATP synthase protein. The movement of the hydrogen ions through this structure combines ADP with phosphate, producing ATP.
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Which does not occur during the light dependent reaction?
Which does not occur during the light dependent reaction?
Carbon fixation, catalyzed by Rubisco, occurs during the first step of the light independent reaction.
Carbon fixation, catalyzed by Rubisco, occurs during the first step of the light independent reaction.
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What products of the light dependent reaction are necessary for the light independent reaction to occur?
What products of the light dependent reaction are necessary for the light independent reaction to occur?
ATP and NADPH are produced during the light dependent reaction, and are reactants necessary for the light independent reaction (Calvin Cycle) to occur. During the light independent reaction, ATP and NADPH are used to convert phosphoglycerate molecules (PGA) to glyceraldehyde-3-phosphate molecules (G3P). G3P is then used to produce glucose.
ATP and NADPH are produced during the light dependent reaction, and are reactants necessary for the light independent reaction (Calvin Cycle) to occur. During the light independent reaction, ATP and NADPH are used to convert phosphoglycerate molecules (PGA) to glyceraldehyde-3-phosphate molecules (G3P). G3P is then used to produce glucose.
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Which is true of light dependent reactions?
Which is true of light dependent reactions?
Light dependent reactions convert solar energy to chemical energy (in the form of ATP and NADPH). Sunlight and H2O are the reactant of the light dependent reaction. The sunlight is captured by photosystem II, and is used to excite electrons. Splitting of H2O produces hydrogen ions used to establish the proton gradient, and electrons produced replace the electrons transferred to the primary electron acceptor.
Light dependent reactions convert solar energy to chemical energy (in the form of ATP and NADPH). Sunlight and H2O are the reactant of the light dependent reaction. The sunlight is captured by photosystem II, and is used to excite electrons. Splitting of H2O produces hydrogen ions used to establish the proton gradient, and electrons produced replace the electrons transferred to the primary electron acceptor.
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Where is the electron transport chain located, for the light dependent reaction?
Where is the electron transport chain located, for the light dependent reaction?
The electron transport chain is located on the thylakoid membrane. The proton gradient is established through pumping hydrogen ions into the interior of the thylakoid (lumen).
The electron transport chain is located on the thylakoid membrane. The proton gradient is established through pumping hydrogen ions into the interior of the thylakoid (lumen).
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What is the first step in photosynthesis?
What is the first step in photosynthesis?
Photosynthesis begins with energy from light being converted to chemical energy. The only answer explanation accurately explaining this process describes the conversion of light energy (photons) to chemical energy (excited electrons).
Photons present in light strike and excite electrons in chlorophyll.
The photons are highly energized light particles, which strike chlorophyll and excite and free electrons in the chlorophyll molecule. These excited electrons pass through the electron transport chain and their energy is collected to make ATP.
Photosynthesis begins with energy from light being converted to chemical energy. The only answer explanation accurately explaining this process describes the conversion of light energy (photons) to chemical energy (excited electrons).
Photons present in light strike and excite electrons in chlorophyll.
The photons are highly energized light particles, which strike chlorophyll and excite and free electrons in the chlorophyll molecule. These excited electrons pass through the electron transport chain and their energy is collected to make ATP.
Compare your answer with the correct one above
The light reactions of photosynthesis are responsible for the production of which of the following molecules?
The light reactions of photosynthesis are responsible for the production of which of the following molecules?
The light reactions are the steps of the photosynthesis that function to convert solar energy into chemical energy that can be used during the Calvin cycle. The light reactions use solar energy to reduce to and to convert to .
The light reactions are the steps of the photosynthesis that function to convert solar energy into chemical energy that can be used during the Calvin cycle. The light reactions use solar energy to reduce
Compare your answer with the correct one above
Which of the following is a by-product of the light reactions in photosynthesis?
Which of the following is a by-product of the light reactions in photosynthesis?
During the light reactions water is split and the by-product is oxygen. Oxygen is then released back into the atmosphere. Sugars are produced during the Calvin cycle and are not a direct product of the light reactions.
During the light reactions water is split and the by-product is oxygen. Oxygen is then released back into the atmosphere. Sugars are produced during the Calvin cycle and are not a direct product of the light reactions.
Compare your answer with the correct one above
Where do the light reactions of photosynthesis occur?
Where do the light reactions of photosynthesis occur?
The light reactions of photosynthesis occur in the thylakoid membranes inside of chloroplasts in plant cells. Photosynthesis depends on the buildup of a proton gradient across a membrane to generate ATP. The thylakoid is an organelle present only in plants. The phospholipid bilayer and cell wall surround plant cells, and are not involved in photosynthesis.
The light reactions of photosynthesis occur in the thylakoid membranes inside of chloroplasts in plant cells. Photosynthesis depends on the buildup of a proton gradient across a membrane to generate ATP. The thylakoid is an organelle present only in plants. The phospholipid bilayer and cell wall surround plant cells, and are not involved in photosynthesis.
Compare your answer with the correct one above
When a molecule of NAD⁺ gains a hydrogen atom, the molecule becomes?
When a molecule of NAD⁺ gains a hydrogen atom, the molecule becomes?
The molecule is reduced because when a molecule gains an electron, it is said to be reduced. The answer oxidized would have been chosen if the molecule lost an electron. Plasmolysis has nothing to do with the gain or loss of an electron, and the term redoxed does not fit into this question. Hydrolysis is when a bond is broken using water, so that is incorrect as well.
The molecule is reduced because when a molecule gains an electron, it is said to be reduced. The answer oxidized would have been chosen if the molecule lost an electron. Plasmolysis has nothing to do with the gain or loss of an electron, and the term redoxed does not fit into this question. Hydrolysis is when a bond is broken using water, so that is incorrect as well.
Compare your answer with the correct one above
What is the purpose of the light dependent reaction?
What is the purpose of the light dependent reaction?
The light dependent reaction converts solar energy to chemical energy, using the photosystem to capture light energy, and ultimately produce ATP and NADPH. Pigment molecules in the photosystem absorb photons of light, which then reach the chlorophyll, exciting electrons in the chlorophyll. The excited electron then is transferred to a primary electron acceptor of the electron transport chain (and is replaced by the splitting of water (to produce O2, H+ and e-)).
The light dependent reaction converts solar energy to chemical energy, using the photosystem to capture light energy, and ultimately produce ATP and NADPH. Pigment molecules in the photosystem absorb photons of light, which then reach the chlorophyll, exciting electrons in the chlorophyll. The excited electron then is transferred to a primary electron acceptor of the electron transport chain (and is replaced by the splitting of water (to produce O2, H+ and e-)).
Compare your answer with the correct one above
During the light dependent reaction, what is the purpose of creating a proton gradient in the thylakoid lumen?
During the light dependent reaction, what is the purpose of creating a proton gradient in the thylakoid lumen?
The ATP synthase protein is embedded in the thylakoid membrane. When sunlight is captured by photosystem II in the light dependent reaction, water is split, producing O2 and 2 H+ ions and 2 electrons. As the electrons flow down the electron transport chain, this energy is used to pump hydrogen ions from the stroma into the thylakoid space, producing a high concentration of hydrogen ions inside the thylakoid lumen. Eventually, the hydrogen ions then flow from the area of high concentration (in the thylakoid lumen) to an area of low concentration (in the stroma ), through the ATP synthase protein. The movement of the hydrogen ions through this structure combines ADP with phosphate, producing ATP.
The ATP synthase protein is embedded in the thylakoid membrane. When sunlight is captured by photosystem II in the light dependent reaction, water is split, producing O2 and 2 H+ ions and 2 electrons. As the electrons flow down the electron transport chain, this energy is used to pump hydrogen ions from the stroma into the thylakoid space, producing a high concentration of hydrogen ions inside the thylakoid lumen. Eventually, the hydrogen ions then flow from the area of high concentration (in the thylakoid lumen) to an area of low concentration (in the stroma ), through the ATP synthase protein. The movement of the hydrogen ions through this structure combines ADP with phosphate, producing ATP.
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Which does not occur during the light dependent reaction?
Which does not occur during the light dependent reaction?
Carbon fixation, catalyzed by Rubisco, occurs during the first step of the light independent reaction.
Carbon fixation, catalyzed by Rubisco, occurs during the first step of the light independent reaction.
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What products of the light dependent reaction are necessary for the light independent reaction to occur?
What products of the light dependent reaction are necessary for the light independent reaction to occur?
ATP and NADPH are produced during the light dependent reaction, and are reactants necessary for the light independent reaction (Calvin Cycle) to occur. During the light independent reaction, ATP and NADPH are used to convert phosphoglycerate molecules (PGA) to glyceraldehyde-3-phosphate molecules (G3P). G3P is then used to produce glucose.
ATP and NADPH are produced during the light dependent reaction, and are reactants necessary for the light independent reaction (Calvin Cycle) to occur. During the light independent reaction, ATP and NADPH are used to convert phosphoglycerate molecules (PGA) to glyceraldehyde-3-phosphate molecules (G3P). G3P is then used to produce glucose.
Compare your answer with the correct one above