(Assume that the light intensity does not change.). The Calvin cycle uses the reduci… c) ATP and NADPH produced in the light reactions provide the energy for the production of sugars in the Calvin Cycle. Which of the following statements is FALSE? B) The release of oxygen does not occur at any stage of the Calvin cycle. Which set of reactions uses H2O and produces O2? E.occurs in the chloroplast but is not part of photosynthesis In the thylakoid membranes, what is the main role of the pigment molecules in a light-harvesting complex? The most important role of pigments in photosynthesis is to __________. These reactions occur in the stroma of the chloroplast, which is the fluid-filled region between the thylakoid membrane and inner membrane of the organelle. a) the calvin cycle incorporates each CO2 molecule, one at a time, by attaching it to a 5-carbon sugar (RuBP). The Calvin cycle breaks down carbohydrates into simpler molecules. This damage will have the most direct effect on which of the following processes? D. water; oxygen • What are the products of the light reactions that are subsequently used by the Calvin cycle? Plants respire, The light reactions of photosynthesis supply the Calvin cycle with. A) carbon fixation B) oxidation of NADPH C) release of oxygen. Reactions That Require CO2 Take Place In 4. The electrochemical gradient that drives this chemiosmosis is formed across which structure(s)? a) Chemiosmosis b) Glycolysis c) Calvin cycle d) Krebs cycle 2. Energy in the form of ATP and NADPH then enter the Calvin cycle which occurs in the stroma of the chloroplast. The Calvin cycle breaks down carbohydrates into simpler molecules. Which of the following sequences correctly represents the flow of electrons during photosynthesis? Illustration by Tim Gunther Which of the following is a product of the light reactions of photosynthesis? glycolysis can occur with or without oxygen glycolysis occurs in the mitochondria glycolysis is the first step in both aerobic and anaerobic respiration glycolysis produces 2 ATP, 2 NADH, and 2 pyruvate. Both minimize photorespiration but expend more ATP during carbon fixation. To continue the cycle, RuBP (Ribulose-1, 5-bisphosphate) is prepared to accept CO 2 in the last step.. ATP (adenosine triphosphate) is consumed during Calvin cycle, because CO 2 is converted into carbohydrate, for this reaction to occur some chemical energy is necessary, so ATP gives this energy. Where do the electrons entering photosystem II come from? The energy used to produce ATP in the light reactions of photosynthesis comes from __________. The Calvin cycle could not occur without the light reactions. Oxidation of NADPH release of oxygen carbon fixation regeneration of the CO_2 acceptor. The light reactions also produce __________ and __________. Updated May 26, 2019. In both cases, rubisco is not used to fix carbon initially. oxidation of NADPH release of oxygen ō ō ō Ō CO2 production production of ATP Which of the following is the original source of electrons for photosynthesis? Calvin Cycle. … The Calvin cycle is the term used for the reactions of photosynthesis that use the energy stored by the light-dependent reactions to form glucose and other carbohydrate molecules. 2. Plants photosynthesize only in the light. _____ splits water into 1/2 O2, H+, and e- . Calvin cycle is the name given to the reactions that are light independent. _____ releases energy that is used to pump hydrogen ions from the stroma into the thylakoid compartment. Carbon dioxide and oxygen enter and exit a leaf by diffusion. Chapter Section: 11.8 Bloom’s Taxonomy: Knowledge Learning Outcome: 11.1 Global LO: G2 41) Each of the following directly regulates the Calvin cycle activity to ensure maximum efficiency except 1. Which Of The Following Are Produced By Reactions That Take Place In The Thylakoids … b) they are the ultimate sources of organic compounds for all nonautotrophic. A) creation of a pH gradient by pumping protons across the thylakoid membrane B) carbon fixation in the stroma C) … c) the light reactions by linear electron flow. The Calvin cycle reactions (Figure 2) can be organized into three basic stages: fixa… ATP and NADPH produced by the light reactions are used by the Calvin cycle to make carbohydrates. D) regeneration of the CO2 acceptor E) consumption of ATP Which of the following processes is most directly driven by light energy? The second stage is where the Calvin cycle comes in. Which of the following statements is a correct distinction between autotrophs and heterotrophs? 3. Which substance from the light-dependent reactions of photosynthesis is a source of energy for the light-independent reactions? answer choices ... and use it to make organic compounds is a process called _____. The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. Which structure(s) on a leaf allow(s) this process to happen. a) the first product of carbon fixation in C4 plants is a 4-carbon compound instead of a 3-carbon compound. 2. Carbon dioxide enters the plant via openings in the epidermis that are known as the stomata. The second stage of photosynthesis is the Calvin cycle; this is when the carbon is fixed to form the sugar glucose. calvin cycle krebs cycle . The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. The light reactions of photosynthesis occur in the __________. During the Calvin cycle, carbon is oxidized. These reactions are sometimes called the dark reactions since light is not needed if enough energy has been stored up from the previous light reactions. Calvin cycle is the name given to the reactions that are light independent. oxidative phosphorylation in cellular respiration. 10th - 11th grade. What is the biological significance of the light-independent reactions of photosynthesis? What does the chemiosmotic process in chloroplasts involve? The Calvin cycle reactions (Figure 5.15) can be organized into three basic stages: fixation, reduction, and regeneration. When carbon first enters the Calvin cycle, what molecule does it combine with? B The energy released as electrons are passed along the electron transport chain is used to pump protons into the thylakoid compartment. This means that H2O is _____ during the light reactions and CO2 is _____ during the Calvin cycle. A) This occurs during the Calvin cycle. The Calvin cycle occurs in the thylakoid membrane of chloroplasts. 5. Which process is most directly driven by light energy? Both mitochondria and chloroplasts __________. D.neither the light reactions nor the Calvin cycle. The Calvin Cycle can happen during the day. Others call it the Calvin-Benson cycle to include the name of another scientist involved in its discovery (Figure 1). The Calvin Cycle can happen during the day. Illustration by Tim Gunther During the Calvin cycle, what happens during the carbon fixation phase? The regeneration of CO 2 occurs during the Calvin cycle, which is last or third phase in the cycle. In plants, carbon dioxide (CO 2) enters the leaves through stomata, where it diffuses over short distances through intercellular spaces until it reaches the mesophyll cells.Once in the mesophyll cells, CO 2 diffuses into the stroma of the chloroplast, the site of light-independent reactions of photosynthesis. Light is absorbed and funneled to reaction-center chlorophyll a. Select the most accurate statement describing the basic function of the light reactions of photosynthesis. When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by _____. Which of the following statements best describes the relationship between photosynthesis and respiration? Carbon from the carbon dioxide is fixed to form various intermediate molecules such as glyceraldehyde-3-phosphate. The aquarium has plenty of light, nutrients, and water but a given volume of air. B. hydrolyze ATP. carbon dioxide and water. The reactions occur in the stroma of the chloroplasts. Of the following, which occurs during the Calvin cycle? 10th - 11th grade. Brainscape is a web and mobile study platform that helps you learn things faster. Of the following, which occurs during the Calvin cycle? Which of the following reactions ensures that the Calvin cycle can make a continuous supply of glucose? Why are most autotrophs referred to as the producers of the biosphere? Which of the following does not occur during the Calvin cycle? Sugars are made from CO2. In the electromagnetic spectrum, the type of radiation that we call visible light occurs between _____. thylakoid membrane and inner mitochondrial membrane. The overall function of the Calvin cycle is _____. transfer fixed carbon dioxide to cells in which the Calvin cycle occurs. Calvin Cycle DRAFT. a. CO2 is reduced. Which substance from the light-dependent reactions of photosynthesis is a source of energy for the Calvin Cycle? C4 plants occur more commonly in desert conditions because _____. CO2 is fixed or incorporated into organic molecules. Both mitochondria and chloroplasts _____. True or false? In C3 plants the conservation of water promotes _____. When chloroplast pigments absorb light, __________. Which of the events listed below occurs in the light reactions of photosynthesis? 45) To identify the molecule that accepts CO2, Calvin and Benson manipulated the carbon-fixation cycle by either cutting off CO2 or cutting off light from cultures of photosynthetic algae. The Calvin cycle occurs in the thylakoid membrane of chloroplasts. Which of the following statements is FALSE? The Calvin cycle has three phases: carbon fixation, reduction, and regeneration of RuBP. calvin cycle krebs cycle . Some of these molecules are converted to glucose and soare is recycled so that the process can begin anew. Metabolic pathways are typically redox processes. What is the importance of the light-independent reactions in terms of carbon flow in the biosphere? How is photosynthesis similar in C4 plants and CAM plants? They can do this because they. Electrons released from NADPH occur during the carbon fixation stage of the cycle. Which of these phosphorylates ADP to make ATP? Which of the following products of the light reactions of photosynthesis is consumed during the Calvin cycle? What is the basic role of CO2 in photosynthesis? a. Oxidative phosphorylation in cellular respiration 6. release of oxygen -Chapter 10- Which of the following does not occur during the Calvin cycle? Photosynthesis stores energy in complex organic molecules, whereas respiration releases it. In photosynthesis, what molecule is oxidized and what molecule is reduced? Which substance from the light-dependent reactions of photosynthesis is a source of energy for the Calvin Cycle? answer choices ... and use it to make organic compounds is a process … During the Calvin cycle, carbon is oxidized. Electrons released from NADPH occur during the carbon fixation stage of the cycle. The rate of O2 production would decrease because the rate of ADP and NADP+ production by the Calvin cycle would decrease. During which process is molecular oxygen produced in photosynthesis? The light reactions of photosynthesis use chemiosmosis to produce ATP that will be used in the Calvin cycle. The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions. a. Oxidative phosphorylation in cellular respiration 6. the synthesis of ATP the synthesis of ATP. Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. establishment of a proton gradient across the thylakoid membrane. In the light reactions of photosynthesis, ATP is produced by photophosphorylation. Photosynthesis Oxygen is a by-product of the photosynthetic process. Where does the Calvin cycle of photosynthesis occur? Photosynthesis is a redox reaction. 3. Which of the following statements best describes the relationship between the light-dependent and light-independent reactions of photosynthesis? Calvin Cycle: The Calvin cycle is the second major stage of photosynthesis. they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed, CAM plants keep stomata closed in daytime, thus reducing loss of water. 444 times. _____ has a longer wavelength than _____. In the second stage, six ATP and six NADPH are used to convert the six 3-PGA molecules into six molecules of a three-carbon sugar (G3P). The enzyme involved in catalyzing this reaction is known … glycolysis can occur with or without oxygen glycolysis occurs in the mitochondria glycolysis is the first step in both aerobic and anaerobic respiration glycolysis produces 2 ATP, 2 NADH, and 2 pyruvate. noncyclic electron flow during the light reactions 9 The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. In photosynthetic cells, synthesis of ATP by the chemiosmotic mechanism occurs during, Reduction of oxygen to form water occurs during, Which statement correctly describes how O2 production would be affected? a) ADP and NADP+ produced in the light reactions provide the energy for the production of sugars in the Calvin Cycle b) G3P produced in the light reactions is oxidized in the Calvin cycle b) the Calvin cycle requires products only produced when the photosystems are illuminated. Preview this quiz on Quizizz. Plants are classified as producers because they fix inorganic carbon into organic molecules. Calvin Cycle The Calvin cycle is a part of photosynthesis, the process plants and other autotrophs use to create nutrients from sunlight and carbon dioxide. The alternative pathways of photosynthesis using the C4 or CAM systems are said to be compromises. ATP and NADPH produced by the light reactions are used by the Calvin cycle to make carbohydrates. Even though the cycle is called the dark reaction … In a plant cell, where are the ATP synthase complexes located? Which of the following statements describes why this is the case? Light-dependent reactions harness energy from the sun to … The reactions of the Calvin cycle could be divided into three primary stages: the carbon fixation stage, the reduction stage, and the regeneration of the starting molecule. a) Glycolysis can occur with or without oxygen b) Glycolysis occurs in the mitochondria c) Glycolysis is the first step in both aerobic and anaerobic respiration d) Glycolysis produces 2 ATP, 2 NADH, and 2 pyruvate 3. Which of the following happens during the Calvin cycle? You have planted bean seedlings (C3) and corn seedlings (C4) in soil and sealed them in an aquarium. The light-independent reactions turn CO2, a gas, into usable carbon in the form of sugars. NADPH note: The NADPH produced by photosystem I is used to supply energy for the production of sugars during photosynthesis. A Photosystem II splits water into 1/2 O2, H+, and e- . They then measured the concentrations of various metabolites immediately following the manipulation. Why? These reactions actually have several names associated with them. G3P is used in which of the following processes? The light-dependent reactions of photosynthesis use water and produce oxygen. B.the Calvin cycle alone. Which of the following statements about the Calvin cycle is FALSE. The basic function of the light reactions of photosynthesis is the conversion of solar energy to chemical energy. 444 times. d. the Calvin cycle. The process was first identified by American biochemist Dr. Melvin Calvin in 1957. RuBP consumption of ATP Why are C_4 plants able to photosynthesize with no apparent photorespiration? The Interworkings of the Calvin Cycle Figure 1. For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants.Use the following key: A.light reactions alone. Why? Which of the following metabolic processes can occur without a net influx of energy from some other process? The light reactions of photosynthesis supply the Calvin cycle with __________. removal of electrons from chlorophyll molecules. The Calvin cycle is a process by which the carbon atoms within carbon dioxide are used to build sugars. Which of the following statements correctly describes the difference in carbon fixation between C3 and C4 plants? The Calvin cycle has three phases: carbon fixation, reduction, and regeneration of RuBP. One complete cycle incorporates three molecules of carbon dioxide and produces one molecule of the three-carbon compound glyceraldehyde-3 … Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic. Calvin Cycle The Calvin cycle is a part of photosynthesis, the process plants and other autotrophs use to create nutrients from sunlight and carbon dioxide. c) water is oxidized and carbon dioxide is reduced. The Calvin cycle, Calvin–Benson–Bassham (CBB) cycle, reductive pentose phosphate cycle (RPP cycle) or C3 cycle is a series of biochemical redox reactions that take place in the stroma of chloroplast in photosynthetic organisms.. 5. Select the correct statement about the Calvin cycle. Calvin Cycle DRAFT. Chlorophyll molecules are in which part of the chloroplast? a. 4. Oxygen. Which of the following molecules is the primary product of photosystem I? In plants, carbon dioxide (CO2) enters the chloroplast through the stomata and diffuses into the stroma of the chloroplast—the site of the Calvin cycle reactions where sugar is synthesized. In the light reactions of photosynthesis, ATP is produced by photophosphorylation. This carbon dioxide then combines with the molecule ribulose known as ribulose 1,5-bisphosphate. These reactions occur in the stroma, the fluid-filled area of a chloroplast outside the thylakoid membranes. C.both the light reactions and the Calvin cycle. The Calvin cycle will generate glyceraldehyde 3-phosphate from carbon dioxide. A) This occurs during the Calvin cycle. 1.transfer fixed carbon dioxide to cells in which the Calvin cycle occurs 2.open their stomata only at night 3.use PEP carboxylase to fix carbon dioxide 4.use malic acid to transfer carbon dioxide to the Calvin cycle 5.are better adapted to wet conditions ultraviolet radiation and infrared radiation. In the stroma, in addition to CO 2 , two other chemicals are present to initiate the Calvin cycle: an enzyme abbreviated RuBisCO, and the molecule ribulose bisphosphate (RuBP). Select the correct molecule that is the main product of the Calvin cycle. The Calvin cycle (C3-cycle) or PCR-cycle can be divided into three stages: (a) Car-boxylation, during which atmospheric CO 2 combines with 5-C acceptor molecule ribulose 1, 5-bisphosphate (RuBP) and converts it into 3-phosphoglyceric acid (3-PGA); Which of the listed processes is most similar to photophosphorylation? Which of the following processes occurs during the Calvin cycle? The reactions occur in the stroma of the chloroplasts. Which of the following processes occurs during the second phase, the reduction phase, of the Calvin cycle? Which of the listed processes is most similar to photophosphorylation? The process was first identified by American biochemist Dr. Melvin Calvin in 1957. The oxygen comes from __________. The NADPH Required For The Calvin Cycle Comes From 2 Generation Of Proton Gradients Across Membranes Occurs During 3. The light reactions of photosynthesis generate high-energy electrons, which end up in __________. In this step, initial incorporation of three molecules CO2 … Here is a look at the redox reactions that occur … Which of the following statements is FALSE? Of the following, which occurs during the Calvin Cycle? Which of the following is the best summary of the process of photosynthesis? C4 plants differ from C3 and CAM plants in that C4 plants _____. How the products of the light reactions, ATP and NADPH, are used to fix carbon into sugars in the second stage of photosynthesis. In mechanism, photophosphorylation is most similar to. Photosynthesis: It is the process of generation of organic compounds from inorganic ones i.e. In C4 and CAM plants carbon dioxide is fixed in the _____ of mesophyll cells. Energized electrons from ____ enter an electron transport chain and are then used to reduce NADP+. The Calvin cycle is a set of light independent redox reactions that occur during photosynthesis and carbon fixation to convert carbon dioxide into the sugar glucose. The Calvin cycle could not occur without the light reactions. fix CO2 into organic acids during the night. The Calvin Cycle. These reactions take the products (ATP and NADPH) of light-dependent reactionsand perform further chemical processes on them. The second stage is the dark reaction phase, where water and carbon dioxide are converted into organic molecules. B) The release of oxygen does not occur at any stage of the Calvin cycle. Calvin Cycle. Both mitochondria and chloroplasts _____. Which of the following does not occur during the Calvin cycle? a. CO2 is reduced. Which of the following does not occur during the Calvin cycle? The Calvin Cycle. The Calvin-Benson cycle, in which carbon is fixed, reduced, and utilized, involves the formation of intermediate sugar phosphates in a cyclic sequence. This is a dynamic process as the same bond is formed again by other proteins that deactivate the enzymes. Phase 1 in Calvin cycle: Carbon fixation. 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