Evolution led to the formation of RuBisCO that is used by C3 plants to fix CO2. Why do you think that it led to an enzyme that also binds to O2 (which causes photorespiration that isn't beneficial to the plant)? 2) Explain what is meant by the statement: "C4 plants separate C3 and C4 processes in space and CAM plants separate C3 and C4 processes in time."

Evolution led to the formation of RuBisCO that is used by C3 plants to fix CO2. Why do you think that it led to an enzyme that also binds to O2 (which causes photorespiration that isn't beneficial to the plant)? 2) Explain what is meant by the statement: "C4 plants separate C3 and C4 processes in space and CAM plants separate C3 and C4 processes in time."

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter8: Photosynthesis

Section: Chapter Questions

Problem 3VCQ: Figure 8.18 Which of the following statements is true? In photosynthesis, oxygen, carbon dioxide,...

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Scientific evidence indicates that the CO2 added to the air by the burning of wood and fossil fuels is contributing to global warming, a rise in global temperature. Tropical rain forests are estimated to be responsible for approximately 20% of global photosynthesis, yet the consumption of large amounts of CO2 by living trees is thought to make little or no net contribution to reduction of global warming. Why might this be? (Hint: What processes in both living and dead trees produce CO2?) *
Why would nature evolve a key enzyme, rubisco, that is so sensitive to oxygen, resulting in photorespiration?
Figure 8.18 Which of the following statements is true? In photosynthesis, oxygen, carbon dioxide, ATP, and NADPH are reactants. G3P and water are products. In photosynthesis, chlorophyll, water, and carbon dioxide are reactants. G3P and oxygen are products. In photosynthesis, water, carbon dioxide, ATP, and NADPH are reactants. RuBP and oxygen are products. In photosynthesis, water and carbon dioxide are reactants. G3P and oxygen are products.
SUBJECT: GENERAL BIOLOGY 1 / CAM and C4 Photosynthesis Plant adaptation is varied among all organisms present on Earth’s fauna. Also, we can’t deny the fact that as time goes by, the amount of carbon rises making it more complicated for the rest of organisms to adapt and survive. In relation to their specialized features, predict how C4 and CAM plants will each respond to a doubling of the concentration of CO2 in the atmosphere.
Consider plants that live in a forest's top, middle, or ground layer, as well as algae that live near the ocean's surface or in deep water. Would you expect the same photosynthetic pigments to be present in these different environments in the same species? Why do you think that is the case? What method would you use to test your hypothesis?
In C4 plants, CO2 fixation occurs by adding electrons and a hydrogen ion when splitting water in bundle sheath cells. by joining CO2 to a C3 molecule and pumping it into bundle sheath cells. by splitting water only in bundle sheath cells. by oxidizing a C4 molecule with O2 derived from bundle sheath cells.
Read the article by Taub, 2010 and answer the DQs to Unit -6. What is photosynthesis? Discuss the impact of increasing global CO2 levels on photosynthesis. How different photosynthetic plant type (C3 and C4) will respond to increase in CO2. Which plant will be benefitted more C3 or C4? Why?
Scientific evidence indicates that the CO2CO2added to the air by the burning of wood and fossil fuels is contributing to global warming, a rise in global temperature. Tropical rain forests are estimated to be responsible for approximately 20% of global photosynthesis, yet the consumption of large amounts of CO2CO2 by living trees is thought to make little or no netcontribution to reduction of global warming. Explain why this might be the case. (HINT: What processes in both living and dead trees produce CO2CO2?)
According to the endosymbiont theory: a) modern plant cells are able to carry out photosynthesis because their ancestors engulfed cyanobacteria. b) chloroplasts and mitochondria evolved from prokaryotic cells. c) ancestral eukaryotic cells acquired the ability to carry out aerobic respiration as a result of engulfing aerobic bacteria. d) a and c e) a, b and c
What enzyme fixes CO2 in the cytosol of a mesophyll cell in a C4 plants? Why is the C4 photosynthesis called C4 photosynthesis?
A. The C4 plant performs photosynthesis more efficiently than the C3 when the CO2 concentration is 600ppm or less. Provide one reason why the rate of photosynthesis doesn’t change for the C4 plant when the CO2 concentration increases above 400 ppm. B. Discuss what is happening in the C3 plant when the CO2 levels are below 50 ppm. Provide one reason why this does NOT happen to the C4 plant.
A plant that opens its stomata only at night is a container with a lit candle, the mouse would die. But if he also added a plant to the container, the mouse could live. Priestley concluded that plants “purify” air, allowing animals to breathe. What is the biological basis for this observation? a. C2 plant. c. C4 plant. b. C3 plant. d. CAM plant