Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 10, Problem 7TYU
Summary Introduction
To review:
The relationship between the light-capturing reactions and Calvin cycle to calculate the number of photons used to produce a new G3P and regenerate the RuBP. (Assume 1 ATP is produced for each pair of electrons used to form NADPH.)
Introduction:
The Calvin cycle is a series of
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Chapter 10 Solutions
Biological Science (6th Edition)
Ch. 10 - 1. In antenna complexes, how is energy transferred...Ch. 10 - Why is chlorophyll green? a. It absorbs all...Ch. 10 - 3. What do the light-capturing reactions of...Ch. 10 - At what point in photosynthesis is the...Ch. 10 - 5. Why is the chlorophyll in chloroplasts less...Ch. 10 - Describe the three phases of the Calvin cycle and...Ch. 10 - Prob. 7TYUCh. 10 - 8. CAUTION Which process in plants generates the...Ch. 10 - Predict how the following conditions would affect...Ch. 10 - Prob. 10TYPSS
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- Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?arrow_forwardDescribe the purpose of the light dependent reaction and light independent reaction (carbon fixation reaction) in photosynthesis. In addition, explain how the products of the light dependent reaction are used in the light independent reaction (carbon fixation reaction)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
- Please answer option (c) with proper explanation.arrow_forwardIdentify the correct compound to create a chemical equation that represents Photosynthesis. + Drag and drop the right reactants and products of the Light Dependent and Light Independent (aka Dark) Reactions. Chloroplast NADPH NADP+ ADP Water - H20 Calvin Cycle Glucose - C6H1206 ATP Light Reaction Thylakoids Stroma O2 Carbon Dioxide CO2 Identify the reactants and products that are used and given off by plants and animals.arrow_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_forward
- In 1966, André Jagendorf and Ernest Uribe directly tested whether artificial proton gradients in isolated chloroplasts could support the generation of ATP without redox energy or light. Chloroplasts were suspended in the dark in low-pH buffer and allowed to equilibrate. When the buffer was changed to a higher pH and ADP and radiolabeled phosphate (32P) were added, 32p-labeled ATP accumulated in the stroma. Answer the following questions on the basis of the results of this experiment: pH 4 ++K o comune OpH 111 7!!! o↓ Measure amount of sip.ATP synthesized Allow to equilibrate OC. 8 OD. 6 Add ADP and p Choose one: ⒸA. 16 OB. 12 Which of the following is a true representation of the experimental design and results? B. Choose one: A. In order for ATP to be synthesized, the concentration of protons must be higher in the lumen than in the surrounding chloroplast solution. OB. ATP was used as an energy source to pump protons from the lumen into the stroma. OC. The proton-motive force…arrow_forwardPls help ASAParrow_forwardExplain in detail of the stages of photosynthesis without explaining all the reactions of each pathways, but state the key steps of each pathway. Mention the location where each pathway happens in the plant and lastly make a table of the products formed at the end of the stage (ATPs, NADPHs, and water). Discuss about the oxidation-reduction of various molecules that are a part of these pathways.arrow_forward
- DRAW a curved arrow mechanism for photosynthesis with the following steps. Step 1: Absorption of sunlight and excitation of chlorophyll molecules Step 2: Transfer of energy to reaction center chlorophylls, which lose an electron and become oxidized. Step 3: Electron transfer from oxidized chlorophylls to an electron acceptor, such as a quinone molecule Step 4: Electron transfer from the quinone molecule to a chain of electron carriers, such as cytochromes, which generate a proton gradient across the thylakoid membrane Step 5: ATP synthesis by ATP synthase using the energy of the proton gradient. Step 6: Transfer of electrons from the electron carriers to the enzyme rubisco, which catalyzes the carboxylation of ribulose bisphosphate (RuBP) with CO2, forming an unstable 6-carbon intermediate. Step 7: Cleavage of the 6-carbon intermediate into two 3-carbon molecules, which are phosphorylated by ATP and reduced by NADPH to form glyceraldehyde-3-phosphate (G3P) Step 8: Conversion of G3P to…arrow_forwardReferring to the figure below(first picture) explain photosynthetic electron transport. Then compare the process outlined in figure with figure 1, What are the similarities and differences?arrow_forwardWhy is a hypotonic buffer used for the resuspension? 1.DCPIP passes easily across the intact chloroplast membrane, but can't get into the thylakoid, so electron transport could not be reliably measured if using a hypotonic buffer. 2.To gently lyse the chloroplasts, leaving the electron transport membranes intact, whilst allowing DCPIP access 3.To gently separate the chloroplasts from each other, leaving the electron transport membranes intact, whilst allowing DCPIP access 4.DCPIP cannot easily across the intact chloroplast membrane, so electron transport could not be reliably measured if using a hypotonic buffer.arrow_forward
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