Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 5, Problem 5RQ
What is the energy of a photon first used to do in photosynthesis?
a. split a water molecule
b. energize an electron
c. produce ATP
d. synthesize glucose
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What happens when light hits the pigments, P680 and P700. during the light-dependent
reactions?
A. Excited electrons are passed to electron acceptors
B. Glucose is produced
C. Carbon fixation occurs
D. Electrons are fused to form ATP
When oxygen gas is released as a result of photosynthesis, it is a direct byproduct of what process?
a. splitting of water molecules
b. the electron transfer system in the photosystems
c. chemiosmosis
d. reducing of NADP+
What are the roles of ATP and NADPH in photosynthesis?
a. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce sugars.
b. ATP and NADPH are forms of chemical energy produced from the light independent reactions, to be used in the light dependent reactions that produce sugars.
c. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce proteins.
d. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that use sugars as reactants.
Chapter 5 Solutions
Concepts of Biology
Ch. 5 - Figure 5.7 On a hot, dry day, plants close their...Ch. 5 - What two products result from photosynthesis? a....Ch. 5 - Which statement about thylakoids in eukaryotes is...Ch. 5 - From where does a heterotroph directly obtain its...Ch. 5 - What is the energy of a photon first used to do in...Ch. 5 - Which molecule absorbs the energy of a photon in...Ch. 5 - Plants produce oxygen when they photosynthesize....Ch. 5 - Which color(s) of light does chlorophyll a...Ch. 5 - Where in plant cells does the Calvin cycle take...Ch. 5 - Which statement correctly describes carbon...
Ch. 5 - What is the molecule that leaves the Calvin cycle...Ch. 5 - What is the overall purpose of the light reactions...Ch. 5 - Why are carnivores, such as lions, dependent on...Ch. 5 - Describe the pathway of energy in light-dependent...Ch. 5 - Which part of the Calvin cycle would be affected...Ch. 5 - Explain the reciprocal nature of the net chemical...
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- Which molecule absorbs the energy of a photon in photosynthesis? a. ATP b. glucose c. chlorophyll d. waterarrow_forwardWhich statement correctly describes carbon fixation? a. the conversion of CO2 to an organic compound b. the use of RUBISCO to form 3-PGA c. the production of carbohydrate molecules from G3P d. the formation of RuBP from G3P molecules e. the use of ATP and NADPH to reduce CO2arrow_forwardPlants produce oxygen when they photosynthesize. Where does the oxygen come from? a. splitting water molecules b. ATP synthesis c. the electron transport chain d. chlorophyllarrow_forward
- Which statement about the light reactions of photosynthesis and cellular respiration is correct? a. Both reactions occur in the cell cytoplasm b. plants do not require mitochondria because they produce ATP via photosynthesis c. ATP is produced as a result of the actions of an electron transport chain in both processes d. Light reactions and cellular respiration produce the same waste products e. the final electron acceptor in the light reactions is oxygenarrow_forwardHow is the proton gradient of H+ generated in chloroplasts during photosynthesis? A. Light splits water molecules in the stroma, causing the release of protons. B. Protons are pumped across the thylakoid membrane using energy from ATP. C. Light causes protons to flow through protein channels in the thylakoid membrane. D. The flow of electrons from carrier to carrier in the thylakoid membrane causes the pumping of protons.arrow_forwardThe diagram below shows the relationship between photosynthesis and cellular respiration and the organelles in which they occur. 3. Photosynthesis and Cellular Respiration Sunlight Energy Carbon Dioxide Glucose + Water Oxygen ATP Which statement describes how photosynthesis and cellular respiration are interrelated? A. Oxygen is produced during cellular respiration and stored during photosynthesis. Carbon dioxide and water released by photosynthesis are used in cellular respiration. C. В. Photosynthesis absorbs energy as part of the process, but energy is released during the process of cellular respiration. D. Glucose is used during photosynthesis to produce food that is broken down during cellular respiration.arrow_forward
- What is the color of the visible light that is not utilized in photosynthesis? Select one: a. orange b. green c. blue d. yellow e. redarrow_forwardWhich complex is not involved in the establishment of conditions for ATP synthesis? a. photosystem I b. ATP synthase c. photosystem II d. cytochrome complexarrow_forwardThe different parts of the chloroplast have separate reactions that occur in them. Which occurs in the stroma? A. Photolysis B. Light-dependent reaction C. Electron transport chain D. Calvin cyclearrow_forward
- How does the process of photosynthesis provide evidence for the Law of Conservation of Mass? A. The total mass of glucose created at the end of photosynthesis equals the amount of carbon dioxide used. B. In photosynthesis the total amount of carbon dioxide and water used to produce energy and oxygen will equal the total mass. В. C. In photosynthesis the total amount of glucose and oxygen produced will equal the total amount of water and carbon dioxide initially used. D. The total mass will not change in photosynthesis since equal amounts of oxygen and water are produce when equal amounts of energy and carbon dioxide used. 3.arrow_forwardIn which compartment of the chloroplast and mitochondrion does the ATP synthase pump the protons respectively? a. Stroma and matrix b. Lumen and thylakoid membrane c. Lumen and intermembrane space d. Matrix and thylakoid lumenarrow_forwardWhich process of photosynthesis is directly linked to the production of ATP? Select one: A. Synthesis of O2 B. Photosystem II C. Generation of NADPH D. Fixing of carbonarrow_forward
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