Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 9.2, Problem 3LO
Summary Introduction
To describe: What happens to an electron in a biological molecule such as chlorophyll when a photon of light energy is absorbed.
Concept introduction: Photosynthesis is a process in which the green plants and algae obtain their nutrients. This process takes place in the chloroplast where chlorophyll molecules are present. The chloroplast contains thylakoid membrane where the light reaction takes place. The end product of the light reaction is the formation of ATP and NADPH, which together helps in driving the Calvin cycle in the stroma of chloroplast.
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Chapter 9 Solutions
Biology (MindTap Course List)
Ch. 9.1 - Describe the physical properties of light and...Ch. 9.1 - Prob. 1CCh. 9.1 - Prob. 2CCh. 9.2 - Diagram the internal structure of a chloroplast...Ch. 9.2 - Prob. 3LOCh. 9.2 - Prob. 1CCh. 9.2 - What is the significance that the combined...Ch. 9.2 - Prob. 3CCh. 9.3 - Describe photosynthesis as a redox process.Ch. 9.3 - Distinguish between the light-dependent reactions...
Ch. 9.3 - Prob. 1CCh. 9.3 - In what ways do the carbon fixation reactions...Ch. 9.4 - Describe the flow of electrons through...Ch. 9.4 - Explain how a proton (H+) gradient is established...Ch. 9.4 - Prob. 1CCh. 9.4 - Prob. 2CCh. 9.4 - PREDICT Can cyclic electron transport alone...Ch. 9.5 - Summarize the three phases of the Calvin cycle and...Ch. 9.5 - Prob. 9LOCh. 9.5 - Prob. 10LOCh. 9.5 - Describe what happens in each of the three phases...Ch. 9.5 - A decrease in entropy occurs during the CO2 uptake...Ch. 9.5 - In what ways does photorespiration differ from...Ch. 9.5 - Prob. 4CCh. 9.6 - Prob. 11LOCh. 9.6 - Prob. 1CCh. 9.7 - State the importance of photosynthesis both in a...Ch. 9.7 - Prob. 1CCh. 9.7 - Prob. 2CCh. 9 - Where is chlorophyll located in the chloroplast?...Ch. 9 - In photolysis some of the energy captured by...Ch. 9 - Prob. 3TYUCh. 9 - In ________, electrons that have been energized by...Ch. 9 - The Calvin cycle begins when CO2 reacts with (a)...Ch. 9 - The enzyme directly responsible for almost all...Ch. 9 - Prob. 7TYUCh. 9 - An organism characterized as a photoautotroph...Ch. 9 - VISUALIZE Draw a simple sketch illustrating a...Ch. 9 - Prob. 10TYUCh. 9 - Prob. 11TYUCh. 9 - Prob. 12TYUCh. 9 - CONNECT High-energy electrons from glucose are...Ch. 9 - PREDICT What would life be like for...Ch. 9 - EVOLUTION LINK Propose an explanation for...Ch. 9 - INTERPRET DATA The figure depicts the absorption...Ch. 9 - SCIENCE, TECHNOLOGY, AND SOAETY What strategies...
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- In the photosynthesis reaction: 6 CO2 + 6 H2O → C6H12O6 + 6 O2, the substance that serves as the reducing agent isarrow_forwardOutline (LIST) the path of one electron during the light dependent reaction of photosynthesis. Starting by naming the source of the electron, the electron path from one molecule or site to another, finally reaching the final electron acceptor. You may use arrows to signify the path of the electron.arrow_forwardDuring photosynthesis, low energy electrons are struck by light, bumped up to higher energy levels, and then incorporated into organic molecules. Where does the chloroplast or Cyanobacterium obtain these electrons? From carbon dioxide From sunlight From water From ATParrow_forward
- In the light reactions of photosynthesis, electrons within the pigment molecules that are embedded in the plasma membranes of the thylakoids are hit by photons of sunlight. This dramatically increases the energy in these electrons. When photons of light strike electrons in other kinds of molecules, the electrons are raised to high energy levels, but immediately drop back down to their ground states, re-emitting the photons. However, in the light reactions, an excited electron is passed to an electron acceptor molecule before it can drop back down to its ground state. The excited electron is then passed from the primary electron receptor to the electron transport chain and eventually ends up as part of a glucose molecule. If the pigments in the thylakoid are continually passing their electrons to other molecules, how do the pigments replace their missing electrons? To replace the missing electrons, an enzyme removes the two hydrogen atoms from a water molecule.…arrow_forwardChlorophyll is the green pigment found in plants. Which of the following statements can be implied regarding chlorophyll? O Chlorophyll does not absorb in the UV region. O Chlorophyll is made up of only C- H, C- C, C- N and C-O single bonds. O Chlorophyll uses the blue and red colors for photosynthesis. O Chlorophyll uses the green color for photosynthesis.arrow_forwardDefine: Entropy, Thylakoid, Law of energy conservation (show 2 examples in biological systems), Stroma, Electron transport chainarrow_forward
- What do organisms need along with chloroplasts to perform photosynthesis? (Choose all that apply.) Sunlight Carbon dioxide OGlucose Waterarrow_forwardThe process of photosynthesis can be modeled in various ways. For example, a chemical equation is one way to represent photosynthesis. 6CO, + 6H,0 ++ +→ 60, + C,H,,O,arrow_forwardIllustrate by diagram the interrelatedness of the light dependent reaction and the carbon reaction. Explain your illustration.arrow_forward
- Chloroplasts contain chlorophyll and carotenoids. Chlorophyll directly absorbs light for use in photosynthesis. Carotenoids absorb light and transfer the energy from light to chlorophyll. The efficiency of photosynthesis varies with the wavelengths of the light that illuminates the chloroplasts. In an experiment to study the relationship between the incoming light wavelengths and the chemical reactions of photosynthesis using a species of green algae, a researcher labeled the CO2 supply to the algae with 14C, and the H2O with 18O. Which of the following results is expected? More 14C is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red light. More 18O is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red light. More 14C is found in the algae when it is illuminated by blue-violet and red light than when it is illuminated by green light. More 18O is found in the algae when…arrow_forwardThere are three types of photosynthetic pigments. Name and describe each pigment.arrow_forward1. a) Analyze the graph (Explain the meaning of the graph) b) Which aspect of this graph has been the MOST interesting.arrow_forward
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