Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 8.3, Problem 2CC
WHAT IF? Explain why a poison that inhibits an enzyme of the Calvin cycle will also inhibit the light reactions.
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Photosynthesis and Cell respiration:
A. What should happen to the O2 levels in a closed container containing a plant during the day? why?
B. And what happens to the O2 levels during the night (no light)? Why?
Another Thought Question!
Calculate the gross and net photosynthetic productivity for this whole plant (lear
stems & roots) in this experiment. What do you think is happening in this plant
regard to the relationship between cellular respiration and photosynthesis, and
might a living plant be exhibiting these metabolic characteristics?
Light
Slope = 10.0 ppm/min
%3D
Slope = 10.0 ppm/min
CO, concentration (ppm)
Dark
"Energy Transformation"
ATP-ADP CYCLE
Construct a final draft sketch on the photoexcitation of Chlorophyll.With labels and explanation.
Chapter 8 Solutions
Campbell Biology In Focus
Ch. 8.1 - How do the reactant molecules of photosynthesis...Ch. 8.1 - How did the use of an oxygen isotope help...Ch. 8.1 - WHAT IF? The Calvin cycle requires ATP and NADPH,...Ch. 8.2 - What color of light is least effective in driving...Ch. 8.2 - In the light reactions, what is the initial...Ch. 8.2 - Prob. 3CCCh. 8.3 - MAKE CONNECTIONS How are the large numbers of ATP...Ch. 8.3 - WHAT IF? Explain why a poison that inhibits an...Ch. 8.3 - Prob. 3CCCh. 8 - The light reactions of photosynthesis supply the...
Ch. 8 - Which of the following sequences correctly...Ch. 8 - How is photosynthesis similar in C4, plants and...Ch. 8 - Which of the following statements is a correct...Ch. 8 - Which of the following does not occur during the...Ch. 8 - In mechanism, photophosphorylation is most similar...Ch. 8 - Prob. 7TYUCh. 8 - To synthesize one glucose molecule, the Calvin...Ch. 8 - SCIENCE, TECHNOLOGY, AND SOCIETY Scientific...Ch. 8 - DRAW IT The following diagram represents an...Ch. 8 - Prob. 11TYUCh. 8 - Prob. 12TYUCh. 8 - FOCUS ON ENERGY AND MATIER Life is solar powered....Ch. 8 - SYNTHESIZE YOUR KNOWLEDGE Watermelon snow in...
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- True or False? The following is the correct sequence for the movement of electrons during the light-dependent reactions of plants: A) P680 --> P700 --> water --> NADP+ In cellular metabolism, photosynthesis uses solar energy to produce energy-rich organics; respiration breaks down energy-rich organics to synthesize ATParrow_forwardIS THIS A GOOD BREAK DOWN? WHAT ELSE CAN I SHOULD I ADD? Briefly explain the light-dependent reactions of photosynthesis: where does this take place, what are the reactants and what is produced? Light-dependent reactions are used to convert light energy into chemical energy for use by the plants. Through the process of photosynthesis, the energy collected from the sun is broken down, along with water molecules, to produce NADPH and ATP. Light-dependent reactions Goal Convert light energy into chemical energy Location Chloroplasts—thylakoids Input Sunlight, H2O, NADP+, ADP Output NADPH, ATP, O2arrow_forwardATP is produced by chemiosmosis in photosynthesis". Identify where and how this chemical gradient is formed?how this is driving the ATP synthesis. Mention where the light dependent and light independent reactions of photosynthesis take place along with the functional end product(s) of these two stages. Dark and light reactions of photosynthesis are interconnected, how?arrow_forward
- Answers can be kept very simple and concise Photosynthesis: A) Is NADPH consumed during the light reactions or Calvin cycle? What is it’s energy used to do? Protons move across the thylakoid membrane in both directions during the light reactions of photosynthesis. B) When protons move in to the thylakoid, are they moving up or down their concentration gradient? (From low to high concentration or from high to low concentration?) C) Since protons are charged, they cannot freely diffuse across a plasma membrane. What protein(s) facilitate the transport of protons in to the thylakoid?arrow_forwardWhat are the stages of the Calvin-Benson cycle? Select all that apply. The resulting unstable six-carbon molecule splits into two three-carbon molecules of PGA. ATP and NADPH are used to convert PGA molecules to PGAL. Most of the PGAL is used to regenerate RuBP, but some is exported to the cytoplasm to produce carbohydrates. Rubisco attaches CO2 to a five-carbon organic compound called RuBP. Rubisco is used to convert PGA molecules to PGAL.arrow_forward"Energy Transformation" ATP-ADP CYCLE Answer the following questions correctly and explain your answer. 1. What wavelength of light is most important to life on earth? 2. What color/s of light does chlorophyll absorb? What color does it reflect? 3. What composes a photosystem ? 4. In what part of the photosystem does the first step of light reaction take place? 5. Differentiate the two types of photosystem.arrow_forward
- . It is believed that the ratio of cyclic photophosphorylation to noncyclic photophosphorylation changes in response to metabolic demands. In each of the following situations, would you expect the ratio to increase, decrease, or remain unchanged? (a) Chloroplasts carrying out both the Calvin cycle and the reduction of nitrite (NO,-) to ammonia (This process does not require ATP.) (b) Chloroplasts carrying out not only the Calvin cyde but also extensive active transport (c) Chloroplasts using both the Calvin cyde and the C, pathwayarrow_forwardWhich of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correctarrow_forwardProduces 02 as a by-product [ Choose ] NADPH releases high-energy [ Choose ] electrons NADP+ picks up high-energy [ Choose ] electrons Takes place in the thylakoids of [ Choose ] the chloroplasts ATP is broken apart [ Choose ] Includes the electron transport [ Choose ] chain and the H+ gradient ATP is formed [ Choose ] [ Choose ] Requires an input of CO2 Calvin Cycle (synthesis) Light (photo) Reactions Takes place in the stroma of the [ Choose ] 22arrow_forward
- Create a concept map for this. Include all terms. “Photo” Portion of Photosynthesis (“Light Reactions”): Chloroplast, Grana, Thylakoid, Sunlight, Chlorophyll, Photosystem II(ETC), Photosystem I (ETC), High Energy electrons, Proton Gradient, ATP, NADPH, Water, Oxygen, Hydrogen Ions (H+), ADP, NADP+ Use all terms listed. Make as many connections as you can. Be sure your maps are clear.arrow_forward. It is believed that the ratio of cyclic photophosphorylation to non- cyclic photophosphorylation changes in response to metabolic demands. In each of the following situations, would you expect the ratio to increase, decrease, or remain unchanged? (a) Chloroplasts carrying out both the Calvin cycle and the reduction of nitrite (NO, ) to ammonia (This process does not require ATP.) (b) Chloroplasts carrying out not only the Calvin cycle but also extensive active transport (c) Chloroplasts using both the Calvin cycle and the C, pathwayarrow_forward3. For PSII, the cytochrome complex, and PSI, draw and label what happens at that structure on Diagram 6. Then describe the events in a bulleted list in Table 1. Table 1: Descriptions of the steps in the light reactions. Structure What is happening with matter? PSII cytochrome complex f What is happening with energy? 4 At the end of the electron transport chain, where is the light energy that was absorbed and converted by chlorophyll stored? List two answers, LIDE C EMERSINEMIS MENOR mang U □ Marrow_forward
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