Which statement best explains why cellular respiration in plants and other organisms is dependent on photosynthesis? A Photosynthesis is one of the final steps in cellular respiration. Photosynthesis provides the materials that fuel cellular respiration. C Photosynthesis absorbs excess energy produced by cellular respiration. Photosynthesis absorbs materials that are catalyzed during cellular respiration.

Which statement best explains why cellular respiration in plants and other organisms is dependent on photosynthesis? A Photosynthesis is one of the final steps in cellular respiration. Photosynthesis provides the materials that fuel cellular respiration. C Photosynthesis absorbs excess energy produced by cellular respiration. Photosynthesis absorbs materials that are catalyzed during cellular respiration.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter8: Photosynthesis

Section: Chapter Questions

Problem 2ITD

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Photosynthesis directly opposes respiration in determining how plants influence atmospheric CO2 concentrations. When a leaf is in the light, both photosynthesis and respiration are occurring simultaneously. The data in the Table were collected from the leaf of a sagebrush plant that was enclosed in a chamber that measures the rate of CO2 exchange. The same leaf was used to collect the data in Interpret the Data in Chapter 7. Respiration is shown as a negative and photosynthesis as a positive rate of CO2 exchange. The net photosynthesis rate is the amount of CO2 (in micromoles per square meter per second) assimilated by the leaf while respiration is occurring; a positive value indicates more photosynthesis is occurring than respiration. The light exposed to the leaf is quantified as the number of photons in the 400 to 700 nm wavelength, the photosynthetic photon flux density (PPFD); 2,000 mol/m2/s is equivalent to the amount of light occurring at midday in full Sun. Observation Photosynthetic Photon Flux Density (PPFD) (mol/m2/s) Net Photosynthesis (mol/m2/s) 1 2,000 9.1 2 1,500 8.4 3 1,250 8.2 4 1,000 7.4 5 750 6.3 6 500 4.8 7 250 2.2 8 0 -2.0 Why is net photosynthesis negative when PPFD is zero? Looking at the respiration data from Interpret the Data in Chapter 7, at what temperature do you think these data were collected? Source: Data based on unpublished research by Brent Ewers, University of Wyoming.
Which of the following defines photorespiration? The metabolic pathway by which most autotrophs use the energy of light to make sugars from carbon dioxide and water The light-independent reactions of photosynthesis Process by which electron flow through electron transfer chains sets up a hydrogen ion gradient that drives ATP formation An inefficient metabolic pathway of producing sugars that occurs when O2 attaches to rubisco
Chloroplasts contain chlorophyll and carotenoids. Chlorophyll directly absorbs light for use in photosynthesis. Carotenoids absorb light and transfer the energy from light to chlorophyll. The efficiency of photosynthesis varies with the wavelengths of the light that illuminates the chloroplasts. In an experiment to study the relationship between the incoming light wavelengths and the chemical reactions of photosynthesis using a species of green algae, a researcher labeled the CO2 supply to the algae with 14C, and the H2O with 18O. Which of the following results is expected? More 14C is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red light. More 18O is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red light. More 14C is found in the algae when it is illuminated by blue-violet and red light than when it is illuminated by green light. More 18O is found in the algae when…
Which of the following statements about photosynthesis is NOT true? Light independent reactions are very similar to the electron transport chain of cellular respiration Light is absolutely essential for both aspects of photosynthesis In order replace electrons, water is split to form oxygen gas Light dependent reactions are very similar, but in reverse, to the Krebs cycle and glycolysis
Adjusting the wavelength of light and increasing the temperature can increase the rate of photosynthesis. Using specifics, describe in detail the effect of wavelength and temperature on photosynthesis and why or how these 2 factors affect the creation of the molecules used in or produced by photosynthesis.
There are many similarities between the process of photosynthesis and the process of cellular respiration. Which of the following is an accurate comparison of photosynthesis and cellular respiration? Only cellular respiration involves an electron transport chain that creates a proton motive force driving ATP synthesis. Only photosynthesis involves redox reactions. The intermembrane space of mitochondria serves a similar function as the thylakoid space of chloroplasts. The Calvin cycle and the citric acid cycle have the same function.
Diagram 8: Temperature and Rate of Photosynthesis 5 10 15 20 25 30 35 40 temperature (°C) The most accurate explanation for lower rates of photosynthesis at high temperatures would be The water splitting enzyme and ATP synthase will change their shapes at higher temperature and not function properly. There is less light at high temperatures to power the light dependent reactions. Less O2 is available to power the Calvin Cycle when temperatures are high. There is a lower availability of CO2 for photosynthesis at higher temperatures. rate of photosynthesis
What is the overall outcome of the light reactions in photosynthesis? NADPH and ATP molecules are produced during the light reactions and are used to power the light independent reactions. NADPH and ATP molecules are produced during the light reactions, which are used to power the light dependent reactions. Sugar and ATP are produced during the light reactions, which are used to power the light independent reactions. Carbon dioxide and NADPH are produced during the light reactions, which are used to power the light dependent reactions.
Photosynthesis and Respiration are opposing processes. One is required to produce food, the other to derive energy from food. Each of these processes involves a cycle to complete its goal. For Photosynthesis it is the Calvin Cycle; for Respiration it is the Krebs Cycle. Listed below are features of both cycles. Indicate which 5 of them are associated with the Calvin Cycle. Creates glucose ATP and CO2 are used ATP and CO2 are produced O A catabolic process An anabolic process. Oxidizes glucose O Occurs in mitochondria O Occurs in chloroplasts Occurs only in green organisms Occurs in all organisms
Which of the following does not occur in anoxygenic photosynthesis? Bacteriochlorophyll is involved in the light reaction. Water is split into oxidized and reduced parts. The system operates under anaerobic conditions. O ATP is formed via cyclic photophosphorylation.
Which of the following is FALSE about photosynthesis? Group of answer choices: -Organisms that can utilize light energy as a food source are called autotrophs. -Photosynthesis occurs in the chloroplasts. -The light phase of photosynthesis produces ATP and NADH. -Carbohydrates, with the aid of energy and reducing power produced from the light phase, are synthesized from carbon dioxide and water.
Cells are open systems that exchange matter and energy with their surroundings. Which of the following best explains why plant cells require sunlight to make organic compounds, according to Gibbs’s theory of free energy? The photosynthetic reaction releases free energy to the surroundings. The photosynthetic reaction’s free energy is in equilibrium. The reactants of photosynthesis have less free energy than the products. The change in free energy (∆G) of the photosynthetic system is less than zero.