Campbell Biology: Custom Edition
18th Edition
ISBN: 9781323717271
Author: Urry, Cain, Wasserman, Minorsky, Reece
Publisher: PEARSON C
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Chapter 10, Problem 5TYU
Summary Introduction
Introduction: Photosynthesis is the process in which the chloroplast of plants capture sunlight, and converts it into chemical energy stored as sugar and other molecules. This occurs in two stages known as the light reactions (require light) and, the Calvin cycle (synthesis). During light reactions, water is split to give off oxygen, and produces ATP and NADPH. During Calvin cycle, a carbon dioxide molecule is accepted by a carbon acceptor molecule (ribulose-1, 5-bisphosphate, RuBP) and forms a six-carbon compound. This is converted into three-carbon sugars (glyceraldehyde-3-phosphate, G3P) through the oxidation of NADPH. Next, some of the G3P molecules form sugars and others regenerate to RuBP molecule.
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Which of the following terms regarding the Calvin cycle are mismatched?
a.) rubisco and ATP production
b.) PGAL and rearranged from glucose
c.) carbon fixation and stroma
In the diagram of photosynthesis shown here, fill in each blank with the appropriate term: (a) Sunlight; (b) CO2; (c) Oxygen; (d) H2O; (e) ATP and NADPH; (f) ADP and NADP+; (g) Sugar; (h) Light reactions; (i) Calvin cycle.
A decrease in entropy occurs during the CO2 uptake phase of the Calvin cycle, as freely moving CO2 molecules become fixed into a carbon skeleton. How can this occur without direct participation by NADPH and/or ATP?
Chapter 10 Solutions
Campbell Biology: Custom Edition
Ch. 10.1 - Prob. 1CCCh. 10.1 - Explain how the use of an oxygen isotope helped...Ch. 10.1 - WHAT IF? The Calvin cycle requires ATP and NADPH,...Ch. 10.2 - What color of light is least effective in driving...Ch. 10.2 - In the light reactions, what is the initial...Ch. 10.2 - Prob. 3CCCh. 10.3 - To synthesize one glucose molecule, the Calvin...Ch. 10.3 - How are the large numbers of ATP and NADPH...Ch. 10.3 - Prob. 3CCCh. 10.3 - DRAW IT Redraw the cycle in Figure 10.19 using...
Ch. 10.3 - Prob. 5CCCh. 10.4 - Describe how photorespiration lowers...Ch. 10.4 - The presence of only PS I, not PS II, in the...Ch. 10.4 - MAKE CONNECTIONS Refer to the discussion of ocean...Ch. 10.4 - WHAT IF? How would you expect the relative...Ch. 10.5 - MAKE CONNECTIONS Can plants use the sugar they...Ch. 10 - Compare the roles of CO2 and H2O in cellular...Ch. 10 - The absorption spectrum of chlorophyll a differs...Ch. 10 - Prob. 10.3CRCh. 10 - Why are C4 and CAM photosynthesis more...Ch. 10 - Explain how all life depends on photosynthsis.Ch. 10 - The light reactions of photosynthesis supply the...Ch. 10 - Which of the following sequences correctly...Ch. 10 - How is photosynthesis similar in C4 plants and CAM...Ch. 10 - Prob. 4TYUCh. 10 - Prob. 5TYUCh. 10 - In mechanism, photophosphorylation is most similar...Ch. 10 - Prob. 7TYUCh. 10 - Prob. 8TYUCh. 10 - EVOLUTION CONNECTION Photorespiration can decrease...Ch. 10 - SCIENTIFIC INQUIRY MAKE CONNECTIONS The following...Ch. 10 - WRITE ABOUT A THEME: ENERGY AND MATTER Life is...Ch. 10 - SYNTHESIZE YOUR KNOWLEDGE Watennelon snow in...
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- The Calvin cycle begins when CO2 reacts with (a) phosphoenolpyruvate(b) glyceraldehyde-3-phosphate (c) ribulose bisphosphate (d) oxaloacetate (e) phosphoglyceratearrow_forwardTypically the CO2 necessary for photosynthesis enters through the stomata of the plant leaves suppose petroleum jelly was used to coat the leaves out of this tomato blocked or closed a) what effect will this have on the light reactions in these leaf cells b) what effect will this have on the Calvin cycle in these leaf cellsarrow_forwardIn biochemistry, the exergonic process ofconverting glucose and oxygen to carbon dioxide and water in aerobic metabolism can be considered the reverse of photosynthesis,in which carbon dioxide and water are converted to glucose andoxygen. Do you expect both processes to be exergonic, both endergonic, or one exergonic and one endergonic? Why? Would youexpect both processes to take place in the same way? Why?arrow_forward
- A culture of the single celled organism Chlamydomonas is actively carrying out photosynthesis in the presence of light and CO2. If you turned off the light, how would you expect the amounts of ribulose 1,5-bisphosphate and 3-phosphoglycerate to change over the next minute? How about if you left the light on and removed the CO2? Please answer these questions with specific references to the Calvin cycle.arrow_forwardWhich of the following sequences correctly represents the flowof electrons during photosynthesis?(A) NADPH S O2 S CO2(B) H2O S NADPH S Calvin cycle(C) H2O S photosystem I S photosystem II(D) NADPH S electron transport chain S O2arrow_forwardDaniel Arnon and coworkers carried out experiments with intact, salt- washed chloroplasts to study photophosphorylation. When the chloroplasts were illuminated in the presence of ADP +P, ATP was produced, but oxygen was not produced or nor consumed. ATP formation was not accom- panied by a measurable electron transport involving any external electron donor or acceptor. The overall reaction for this result is: ADP + P -", ATP When NADP+ was included in addition to the ADP + P, ilumination of the intact chloroplats again resulted in resulted in the photophosphorylation of ADP to ATP. In addition, the NADPpt was reduced to NADPH + H* and o, was produced. Moreover, the light-induced reduction of NADP* was greatly decreased if ADP + P; were ommitted. The equation for this reaction is: NADP* + H,0 + ADP + R -", NADPH + H + ATP + }02 Briefly describe the mechanism(s) of these two types of photophosphoryla- tion that explain all of these results.arrow_forward
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