CUSTOMIZED LAB MANUAL FOR BIOLOGY 1406
14th Edition
ISBN: 9781307716474
Author: Mader
Publisher: MCG
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Chapter 8.2, Problem 4CYP
Describe why the H+ gradient across a thylakoid membrane is referred to as a storage of energy.
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Describe why the H+ gradient across a thylakoid membraneis referred to as a storage of energy.
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.
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.
Chapter 8 Solutions
CUSTOMIZED LAB MANUAL FOR BIOLOGY 1406
Ch. 8.1 - Compare and contrast autotrophs and heterotrophs.Ch. 8.1 - Prob. 2LOCh. 8.1 - Prob. 3LOCh. 8.1 - Prob. 4LOCh. 8.1 - Prob. 1CYPCh. 8.1 - Prob. 2CYPCh. 8.1 - Prob. 3CYPCh. 8.1 - Prob. 4CYPCh. 8.2 - Prob. 1LOCh. 8.2 - Prob. 2LO
Ch. 8.2 - Prob. 3LOCh. 8.2 - Prob. 1CYPCh. 8.2 - Prob. 2CYPCh. 8.2 - Prob. 3CYPCh. 8.2 - Describe why the H+ gradient across a thylakoid...Ch. 8.3 - Describe the three phases of the Calvin cycle.Ch. 8.3 - Prob. 2LOCh. 8.3 - Prob. 1CYPCh. 8.3 - Prob. 2CYPCh. 8.3 - Prob. 3CYPCh. 8.4 - Contrast C3, C4, and CAM photosynthesis.
Ch. 8.4 - Prob. 2LOCh. 8.4 - Prob. 1CYPCh. 8.4 - Prob. 2CYPCh. 8.4 - Prob. 1QTCCh. 8.4 - Prob. 2QTCCh. 8.5 - Prob. 1LOCh. 8.5 - Prob. 2LOCh. 8.5 - Prob. 1QTCCh. 8.5 - Prob. 2QTCCh. 8.5 - Explain the similarities, and difference, between...Ch. 8.5 - Prob. 2CYPCh. 8 - Prob. S3.3BYBCh. 8 - Figure 6.1 How does energy flow in biological...Ch. 8 - Prob. S6.3BYBCh. 8 - Prob. 1CSCh. 8 - Prob. 2CSCh. 8 - Prob. 1ACh. 8 - Prob. 2ACh. 8 - Prob. 3ACh. 8 - Prob. 4ACh. 8 - Prob. 5ACh. 8 - Prob. 6ACh. 8 - Prob. 7ACh. 8 - Prob. 8ACh. 8 - Prob. 9ACh. 8 - Prob. 10ACh. 8 - Prob. 11ACh. 8 - Prob. 12ACh. 8 - Prob. 13ACh. 8 - Prob. 1TCCh. 8 - Prob. 2TCCh. 8 - Prob. 3TC
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- Draw a simple sketch illustrating a thylakoid membrane that is actively involved in chemiosmosis and label the two compartments it separates. Add the ATP synthase complex, indicate the proton gradient, and specify inwhich compartment ATP is synthesized.arrow_forwardwhat is the protein complex embedded in the thylakoid membrane that allows protons to flow down their concentration gradient from thylakoid lumen to the stroma? also, the free energy from the flow of protons is used to power which process?arrow_forwardState the overall equation for cellular respiration. --Explain where each “input” comes from. --Explain where each “output” goes.arrow_forward
- Describe the organization of the thylakoid and how thisorganization is critical to the production of ATP duringphotosynthesis.arrow_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_forwardThe warmth of hot flowers attracts pollinators and helps broadcast the flowers’ (often foul) scent. Corpse flower stalks can reach 98°F, as warm as our bodies. The heat and foul odor both occur in pulses produced by the central stalk. How do these flowers get so hot? Amorphophallus and other heatproducing flowers have evolved mechanisms that disconnect cellular respiration from ATP synthesis. In most cells, cellular respiration uses about 40% of the energy in glucose to synthesize ATP, with the rest given off as heat (see Chapter 8). Hot flowers, on the other hand, synthesize very little ATP; instead, almost all of the energy in glucose is released as heat, causing the flower to warm up. Besides the promise of carrion, what other features have flowers evolved that attract animal pollinators?arrow_forward
- Draw a graph of the functional responses of the photosynthetic rate of a C4 and a CAM plant (2 lines) over the range of PAR.arrow_forwardW hen a culture of Chlamydomonas is exposed to HIGH intensity light, the cells will display negative phototaxis and move away from the light. Which of the following could act as a cellular signal triggering movement away from the light? A. Low levels of P700+ relative to P700 in the chloroplast. B. High levels of G3P in the cytosol. C. High levels of NAD+ relative to NADH in mitochondria. D. Low levels of ATP relative to ADP in the cytosol.arrow_forwardEven though C4 plants require more ATP per CO₂ fixed, at higher temperatures, they are more efficient than C3 plants. Which of the following explains the effectiveness of C4 plants? contains a mutant form of Rubisco that does not bind to oxygen oxygen is prevented from entering the bundle-sheath cells where Rubisco is found Oduring the night, carbon dioxide is stored as malate so that stomata do not need to open during the day O photorespiration in C4 plants produces energy while in C3 plants, energy is consumedarrow_forward
- What among the following would happen to plant exposed to toxin that made thylakoid membranes permeable to protons? a reverasal of proton gradient across thylakoid membrans would result in higher pH in thylakoid lumen than the surrounding stroma reduction of NADP+ inthe chloroplasts would no longer be possible the proton gradient across the ehylakoid membrane woudl be eliminated the transport of electrons by the protein complexes int eh thylakoids would be prevented.arrow_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_forwardA. 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.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