Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 7IQ
- a. In the light, the proton gradient across the thylakoid membrane is as great as 3 pH units. On which side is the pH lowest?
- b. What three factors contribute to the formation of this large difference in H+ concentration between the thylakoid space and the stroma?
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A. Draw a cell membrane and show the H*-ATPase (proton pump) and how it sets up an electrochemical proton
gradient, and show how a cell would accumulate the hydrogen sulphate ion (HSO;) using a proton-hydrogen sulfate
symport, and how the chloride ion would be transported out of the cell via facilitated diffusion.
B. Show how sucrose would be accumulated by vacuoles of root cells via a proton-sucrose antiport.
Condition: A transmembrane (or integral membrane) protein that acts as a H+
channel has been added to the thylakoid membrane.
What impact will thishave to photosynthesis? Explain why. (Specific values are not
required, just an indication of overall effect and reasons why.)
Under conditions of very high light intensity, excess absorbed solar energy is dissipated by the action of photoprotective proteins in the thylakoid membrane. Explain why it is advantageous for these proteins to be activated by buildup of the proton gradient across the membrane.
Chapter 10 Solutions
Study Guide for Campbell Biology
Ch. 10 - Prob. 1IQCh. 10 - Fill in the blanks in the following overview of...Ch. 10 - An action spectrum shows the relative rates of...Ch. 10 - Describe the components of a photosystem.Ch. 10 - Identify the components of linear electron flow in...Ch. 10 - a. On the diagram in Interactive Question 10.5,...Ch. 10 - a. In the light, the proton gradient across the...Ch. 10 - Label the three phases (a, b, and c) and key...Ch. 10 - What are two possible explanations for the...Ch. 10 - a. Where does the Calvin cycle take place in C4...
Ch. 10 - You have already filled in the blanks in several...Ch. 10 - Create a concept map to confirm your understanding...Ch. 10 - Which of the following processes or structures is...Ch. 10 - A plant is growing under bright lights in a sealed...Ch. 10 - The immediate product of the Calvin cycle is...Ch. 10 - A spectrophotometer can be used to measure the a....Ch. 10 - Accessory pigments within chloroplasts are...Ch. 10 - The following diagram is an absorption spectrum...Ch. 10 - Linear electron flow along with chemiosmosis in...Ch. 10 - The chlorophyll known as P680+ has its electron...Ch. 10 - The enzyme rubisco a. uses NADPH and ATP to make...Ch. 10 - In photosynthesis, the splitting of water a....Ch. 10 - The reactions of the Calvin cycle occur in the a....Ch. 10 - A difference between electron transport in...Ch. 10 - How does cyclic electron flow differ from linear...Ch. 10 - Prob. 14TYKCh. 10 - Prob. 15TYKCh. 10 - Prob. 16TYKCh. 10 - RuBP carboxylase-oxygenase is the enzyme that a....Ch. 10 - Prob. 18TYKCh. 10 - CAM plants avoid photorespiration by a. keeping...Ch. 10 - Prob. 20TYKCh. 10 - Prob. 21TYKCh. 10 - Prob. 22TYKCh. 10 - Prob. 23TYKCh. 10 - a. respiration b. photosynthesis c. both...Ch. 10 - a. respiration b. photosynthesis c. both...Ch. 10 - a. respiration b. photosynthesis c. both...
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- b. During peptidoglycan synthesis, removal of a phosphate group from bactoprenel pyrophosphate is inhibited. What is the immediate outcome? What does this mean for cell wall synthesis? Which antibiotic works via this mechanism? ( c. Bacterium Y is photosynthetic. You want to decrease the ability of Bacterium Y to produce glucose through photosynthesis. Explain how you could manipulate the light reactions of photosynthesis to decrease glucose production during the dark reactions in Bacterium Y. Include the name of the pathway that makes glucose during the dark reactions, which/how molecules from the light reactions are used in this pathway, and what specific steps of this pathway would be affected by your manipulations.arrow_forwardDraw a thylakoid disc. Label the following components: Thylakoid membrane Thylakoid space (lumen) PS1 PS2 Ferredoxin NADP Reductase Stroma ATP Synthasearrow_forwardThylakoids were isolated from chloroplasts and incubated in the dark in an acidic solution (pH 4) to equilibrate the pH. After 30 minutes, the thylakoids were transferred to a basic solution (pH 8) and kept in the dark. Will this system produce ATP? Explain. Will this system produce G3P? Explain.arrow_forward
- a) Label PSI Diagram 6 and PSII. Thylakold stroma b) Draw the path of the electron transport chain Thytakoid lumenarrow_forwarda) Label PSI and PSII. b) Draw the path of the electron transport chain. SE Diagram 6 DUS 0 c My Thylakold stroma Thylakoid lumenarrow_forwardAssume a pH gradient of 4.0 units across a thylakoid membrane, with the lumen more acidic than the stroma.What is the standard free energy change per mol O2 produced? How does this compare to the energy required to drive the synthesis of ATP?arrow_forward
- Draw a basic drawing of a thylakoid membrane that is actively engaged in chemiosmosis and mark the two compartments it divides. Add the ATP synthase complex, indicate the proton gradient, and define which compartment ATP is generated in.arrow_forwardA. what cyclic pathway does this common metabolite enter? B. what are the reduced forms of NAD+ and FAD? What are the entry points for the reduced forms of NAD+ and FAD in the electron transport chain? C. what is the final electron acceptor in the electron transport chain?arrow_forwardIdentify the chemical basis for ApH and AY across the chloroplast thylakoid membrane by dragging the descriptions to their targets. Be sure to notice that the upper arrow iindicates ApH and the lower arrow indicates ΔΨ. ATP synthase complex H+ N ADP + P₁ Light energy ATP H*N Photosystem I/II- Chloroplast N side Aus PN ApH T + Thylakoid membrane HTp H+p Lumen Stroma P side Proton circuit A B High H concentration Low positive charge High positive charge Low H+ concentration Within the image, identify the types of proton translocation by dragging each label to its target. O XH₂ 2H+ + Z 2 H* ZH₂ O XH₂ Z 2H+ ZH₂ 2H+ C A B Proton pump Redox looparrow_forward
- The diagram below shows the thylakoid membrane. Give reasons why you think the structure you see is PSI, PSII, cytochrome, or ATP synthase. STROMA Thylakoid membrane Lumen CP43 2H₂O D2 Cyt Osse Pheo Tyrz Mn Peao Mn D1 Mn Mn CP47 MSP O₂ + 4H*arrow_forwardA. Explain the role of ATP in life process. B. Complete the following table by comparing and contrasting the light-dependent and light-independent reactions of photosynthesis. You may use the link below for reference. https://youtu.be/KfvYQgT2M-k Light- independent reactions Point of Light-dependent reactions Comparison 1. Raw materials 2. Part of the chloroplasts where they occur 3. Light requirements 4. Products 15. Ву-productsarrow_forwardAssume a pH gradient of 4.0 units across a thylakoid membrane, with the lumen more acidic than the stroma.What is the longest wavelength of light that could provide enough energy per photon to pump one proton against this gradient, assuming 20% efficiency in photosynthesis and T = 25 °C?arrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license