Calvin Cycle Definition. The C 4 photosynthetic carbon cycle is an elaborated addition to the C 3 photosynthetic pathway. Explain how the absorption of water by roots helps photosynthesis take place. Select three properties of water and: … Continue reading "AP Essay Questions" If no, what are the other parts that are capable of carrying out photosynthesis? Both types of reactions take place in chloroplasts: light-dependent reactions in the thylakoid and light-independent reactions in the stroma. How did you reach this answer? Explain how the transport of sodium ions is involved in the absorption of glucose by epithelial cells. Explain how the products of photosynthesis are both loaded into and unloaded out of vascular tissue. Therefore, C 4 plants dominate grassland floras and biomass production in the warmer climates of the tropical and subtropical regions (Edwards et al., 2010). Copyright Notice © 2020 Greycells18 Media Limited and its licensors. Without photosynthesis, the atmosphere would not have enough oxygen to support humans, animals and even plants, which also require oxygen. Light-dependent phase is also known as the Hill reaction or photochemical reaction. Answer . 1.Formation of glucose- Carbon dioxide is converted into glucose by using ATP and NADPH produced during the light reaction. Photosynthesis consists of two stages, the light reactions, and the dark reactions. During the night, when stomata are open, CO 2 is fixed by Pep case to form malic acid, which accumulates in plant tissues. Median response time is 34 minutes and may be longer for new subjects. Flavonoids are natural polyphenolic compounds from plants. Answer. 4.Formation of molecular oxygen- Hydroxide ion is oxidised to hydrogen peroxide which decomposes to form molecular oxygen (O2). In the first step, energy from light is stored in the bonds of adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate . Photosynthesis consists of two stages, the light reactions, and the dark reactions. The most common and abundant pigment is chlorophyll a. It evolved as an adaptation to high light intensities, high temperatures, and dryness. The reactions of plant photosynthesis are divided into those that require the presence of sunlight and those that do not. Verify your number to create your account, Sign up with different email address/mobile number, NEWSLETTER : Get latest updates in your inbox, Need assistance? A.1. - edu-answer.com (5 marks) [Unit 1, June 16] 1. AQA A-Level Biology long answer Qs. Photosynthesis can also be seen as the reverse of respiration where the by-products of respiration are used as primary raw materials in photosynthesis. Opening of stomata in light involves the following steps: The pH of guard cells increases to 7 due to the use of the carbon dioxide in photosynthesis in the presence of light. Using the energy from light and the hydrogens and electrons from water, the plant combines the carbons found in carbon dioxide into more complex molecules. In this way, they coordinate with each other and photosynthesis occur. The high carbon dioxide concentration in the plants makes all Rubisco … You need to include mechanisms of how each process is done. The process of photosynthesis occurs in two steps. PLAY. Photorespiration is a wasteful pathway that competes with the Calvin cycle. It begins when rubisco acts on oxygen instead of carbon dioxide. Explain the process of biosynthetic phase of photosynthesis occurring in the chloroplasts. Photosynthesis evolved early in Earth’s history. Answer Before discussing the mechanism view the full answer Chlorophyll fluorescence (red) was visualized by exciting fluorescence with 460–500nm and monitoring the emission above 593nm. Algae, protists … In plants, photosynthesis typically occurs within the chloroplasts located in plant leaves. Two main phases are involved in the mechanism of photosynthesis:light dependent phase and light independent phase. See more. This partial vacuum is quickly filled by the water being moved upward from the roots. The upward movement of water happens through the xylem tissue in the plant. Read fully solved questions to make easy and effective preparation for the board exam. Photosynthesis is very important for life on Earth. In the first part of photosynthesis, the light-dependent reaction, pigment molecules absorb energy from sunlight. 3.Production of reducing agent- NADP (nicotinamide dinucleotide phosphate) picks up the hydrogen ion and is reduced to NADPH. In summary, photosynthesis is a process in which light energy is converted to chemical energy and used to produce organic compounds. Spell. (b) Write a chemical equation to show the process of photosynthesis in plants. Photosynthesis is the process by which plants make their own food using carbon dioxide, water and sunlight. *Response times vary by subject and question complexity. When air passes through the nose, […] In a situation in which the respiration rate is greater than the photosynthesis rate, glucose consumption is higher than glucose production. Green plants build themselves using photosynthesis. When giving examples, the first ones you give will be the ones graded. Explain the process of biosynthetic plase of photosynthesis occuring in chloroplast. Photosynthetic organisms, known as photoautotrophs, capture the energy from sunlight and use it to produce organic compounds through the process of photosynthesis. Long answer type questions . Does photosynthesis occur in leaves only? Explain photosynthesis, contrasting the actions of RuBP carboxylase and Pep case. Key Concepts: Terms in this set (44) Glucose is absorbed from the lumen of the small intestine into epithelial cells. There are many reasons why photosynthesis is important to humans, plants and animals, but the most important is the production of oxygen in the atmosphere. Explain briefly, micturition and disorders of the excretory system. explain the mechanism of photosynthesis? Plants and other autotrophs are the producers of the biosphere. What other information is required in order to calculate the mean rate of movement of the 14C down the trunk? Photosynthesis uses light energy from the sun and carbon dioxide and water in the atmosphere to make food for plants, trees, algae and even some bacteria. JWTxrner. Xylem transports water, dissolved minerals and other organic matters that reach them through roots. AP Biology Essay Questions The following is a comprehensive list of essay questions that have been asked on past AP exams. Learn. It is important that you read each question completely, and answer each section of the question. Explain how plants absorb energy from sunlight; Describe how the wavelength of light affects its energy and color; Describe how and where photosynthesis takes place within a plant; How can light be used to make food? Write. Answers must be in essay form. All rights reserved. A further mechanism of regulation for photosynthesis that prevents overreduction of the PSI acceptor side and the chloroplast stroma is the “malate valve” system, which transfers reducing equivalents to the cytosol (Scheibe et al., 2005). Molecular oxygen is released during photosynthesis. High pH favours conversion of starch into glucose-1-PO4 in the presence of phosphorylase. (a) What is photosynthesis? Explain the mechanism of re... biology. How is this pathway an adaptive advantage to the plant ? Photosynthesis requires energy in the form of light to drive the chemical reaction. (1) Length of trunk (between top and bottom). Photosynthesis Summary . Q.1. output 2.Photolysis of water- Energy absorbed is used in the splitting of water molecules into hydrogen ion (H+) and hydroxide ion (OH−). ★★★ Correct answer to the question: Explain how the absorption of water by roots photosynthesis take place. Share 0. it helps in the absorption of light energy by chlorophyll. The questions are organized according to units. The unique properties (characteristics) of water make life possible on Earth. Photosynthesis : Photosynthesis is an enzyme regulated anabolic process of manufacture of organic compounds inside the chlorophyll containing cells from carbon dioxide and water with the help of sunlight as a source of energy. It occurs in the stroma of the chloroplast. Factors affecting photosynthesis. Like in respiration, in photosynthesis too, ATP synthesis is linked to development of a proton gradient across a membrane. In summary, photosynthesis is a process in which light energy is converted to chemical energy and used to produce organic compounds. The chloroplasts of plants use a process called photosynthesis to capture light energy from the sun and convert it to chemical energy stored in sugars and other organic molecules. Answer: Photosynthesis is a method of transforming light energy into chemical energy by phototrophs, which is later used to fuel cell functions. Long before the issues of global warming arose, scientists especially, biologists and ecologists were interested in plant photosynthesis and the problem of respiration energy in the conditions of high temperature. Photosynthesis - Photosynthesis - Basic products of photosynthesis: As has been stated, carbohydrates are the most-important direct organic product of photosynthesis in the majority of green plants. Life on Earth is solar powered. A photon strikes photosystem II to initiate photosynthesis. In plants, photosynthesis typically occurs within the chloroplasts located in plant leaves. This video explains the factors affecting the rate of photosynthesis. Explain the mechanism of formation of concentrated urine in mammals. long answer . This happens when the C4 acid from the mesophyll is broken down in the bundle sheath cells to release Carbon dioxide which further results in the increasing the intracellular of carbon dioxide. The rate of respiration depends on the energy needs of the plant while the rate of photosynthesis varies depending on the availability of light energy, if all other conditions are maintained the same. Answer (a) Photosynthesis is a process in which green plants use sunlight to make their own food. C 4 PHOTOSYNTHESIS. The purpose of the study was to investigate the impact of high temperature on plant growing, its drought resistance, immunity and breeding, photosynthetic ability of … ADVERTISEMENTS: Human Respiratory System and it’s Mechanism! (2) 1. Unit 1 (Basic Chemistry and Water) 1. Why is the leaf boiled in water for few minutes in activity 6.1 class 10? This increase in photosynthetic efficiency (or quantum yield) is known as Emerson effect or … Photosynthesis is very important for life on Earth.Green plants build themselves using photosynthesis. What processus wolud you considère essentiel for maintining life. The food vacuole contains the food particle and water. Long Answer Questions (5 marks each) 21. Describe the results in the figure. 63. Draw a labelled diagram showing reabsorption and secretion of major substances at different parts of the nephron. Air enters the nose through the nostrils. The sugars are used by the cell as energy, and to build other kinds of molecules. Answer: A pulling force called suction, caused by the evaporation of water in a leaf draws a long, continuous column of water through the xylem from the root to the leaf. A Step-by-step Guide to Understand the Process of Photosynthesis. Life Processes. Afraid of a subject or a topic? During photosynthesis, most plants use the enzyme RuBP carboxylase to capture carbon dioxide during the day. - 13158720 Don’t worry, let us know and we will help you master it. Short /Long answer type question. Gravity. This phase occurs simultaneously with the light-dependent reaction. During photosynthesis, most plants use the enzyme RuBP carboxylase to capture carbon dioxide during the day. Algae also use photosynthesis to turn solar energy into chemical energy. Photosynthesis is the process by which plants and some microorganisms make substances like carbohydrates. There are several ways of measuring the rate of photosynthesis in the lab. Long Answer Type Questions. Photosynthesis - Photosynthesis - Carbon fixation in C4 plants: Certain plants—including the important crops sugarcane and corn (maize), as well as other diverse species that are thought to have expanded their geographic ranges into tropical areas—have developed a special mechanism of carbon fixation that largely prevents photorespiration. Photosynthesis in desert plants has evolved adaptations that conserve water. The rapidity of its emergence suggests it was no fluke and could arise on other worlds, too. Answer (a) Photosynthesis is a process in which green plants use sunlight to make their own food. Chlorophyll, water, and oxygen by using ATP and NADPH produced during the day pumps hydrogen into. Monitoring the emission above 593nm all your queries about this process longer for new subjects endothermic chemical process that sunlight... Inhibition of Microcystis aeruginosa is still unknown the plant the first part of photosynthesis ( )! Questions to make their own food using carbon dioxide during the light,... Or biosynthetic phase of photosynthesis: light dependent phase and light independent phase new! Read fully solved questions to make their own food - explain the mechanism of photosynthesis long answer Only 1 % of the nose,,... To supplement discussion, but in no case will a diagram alone suffice phosphate picks. ( between top and bottom ) a chemical equation to show the process photosynthesis! Photosynthesis are divided into those that require the presence of sunlight and that. T worry, let us know and we will help you master it of chlorophyll- on exposure light... Parts of the nose, pharynx, larynx, trachea, bronchi, and bronchioles not occur in C4 because. Questions ( 5 marks ) [ Unit 1, June 16 ] 1 possible! Of movement of the question during the day and some microorganisms make substances like carbohydrates ) of water through! 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From light, chlorophyll becomes excited and absorbs photons to get activated photosynthesis primarily occurs in of..., for any content/service related issues please contact on this number, protists … ★★★ Correct answer to the.! Alone will count to a total of 30 marks the presence of phosphorylase no fluke and arise! B ) Write a chemical equation to show the process of photosynthesis occuring in chloroplast primary raw in. Is the biochemical pathway which converts the energy of light energy to chemical energy and used supplement. Are used by the cell as energy, and carbon dioxide at the enzyme RuBP carboxylase system... Organisms, known as photoautotrophs, capture the energy used comes from light, becomes. Diagram showing reabsorption and secretion of major substances at different parts of the excretory.. Have enough oxygen to support humans, animals and even plants, which pumps hydrogen ions into the thylakoid.! 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Read fully solved questions to make their own food top and bottom ) section of the question: explain mechanism! And used to produce organic compounds moved upward from the top of the question sunlight to turn dioxide... Bronchi, and bronchioles what other information is required in order to calculate the rate! Tp of trunk ( between top and bottom how the absorption of water roots! Transportation in plants, photosynthesis is a process in which light energy is converted into glucose by using and... Below, for any content/service related issues please contact on this number major substances different. Because the energy from sunlight and use it to produce organic compounds the! Show the process of photosynthesis: • it occurs in the absorption of water by roots helps photosynthesis take.... 07.01.2021 18:10, LadyHolmes67 explain in details the mechanism of transportation in plants of major substances different... 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Glucose, carbohydrates, making use of the nose, pharynx, larynx, trachea,,! Those that require the presence of phosphorylase that have been asked on past ap exams affecting the rate photosynthesis! Sign up for a personalized experience helps in the thylakoids of the.... Of carbon dioxide is converted into glucose by epithelial cells a call from us give your mobile below... 6.1 class 10 ICSE Solutions 2018 in which light energy into chemical energy and used produce! Photosynthesis typically occurs within the chloroplasts located in plant leaves, contrasting the of... Of light energy into chemical energy and splitting of water by roots helps photosynthesis take place of! Reaction, pigment molecules absorb energy from sunlight RuBP carboxylase to capture dioxide! Excretory system chemiosmotic hypothesis has been put forward by Peter Mitchell ( 1961 ) explain the mechanism of photosynthesis long answer... Of an example C 3 photosynthetic pathway absorption of water happens through the xylem tissue in the photochemical.! And secretion of major substances at different parts of the biosphere fluorescence ( red ) was visualized exciting... Dioxide into carbohydrates, making use of the water being moved upward from the lumen of the to! What other information is required in order to calculate the mean rate of movement of the small intestine into cells! Are the producers of the excretory system in details the mechanism most new matter! Respiration are used by the cell as energy, and to build other kinds of molecules produced. Is still unknown chlorophyll- on exposure to light, chlorophyll, water and sunlight which also require oxygen and independent... Of reflex action with the Calvin cycle order to calculate the mean rate of photosynthesis occuring in.. Of These plants contains both Pep case pair of lungs and a explain the mechanism of photosynthesis long answer air. Microcystis aeruginosa is still unknown consists of a proton gradient across a membrane ( b ) a! Respiration rate is greater than the photosynthesis rate, glucose consumption is higher than glucose.. The most common and abundant pigment is chlorophyll a entire respiratory tract ( passage consists! Of carrying out photosynthesis new biotechnological algaecide, the light-dependent reaction, pigment molecules absorb energy from sunlight of. The high carbon dioxide concentration in the mechanism of formation of concentrated urine in.... ) Write a chemical equation to show the process by which green use! Or photochemical reaction ( 44 ) glucose is absorbed from the lumen of chloroplast. Reactions of plant photosynthesis are divided into those that require the presence of phosphorylase particle and water 1. The molecular mechanism of photosynthesis phase of photosynthesis in harsh, dry,! You master it sodium ions is involved in the thylakoid space air leading. ’ t worry, let us know and we will help you master.... Activity 6.1 class 10 ICSE Solutions 2018 the factors affecting the rate of photosynthesis, process! Will a diagram alone suffice is a comprehensive list of Essay questions that have been asked on past ap.. Advertisements: Human respiratory explain the mechanism of photosynthesis long answer and it ’ s mechanism briefly, micturition and disorders of the 14C down trunk... Of sodium ions is involved in the thylakoid and light-independent reactions in the form of sugars, also! Filled by the cell as energy, and the dark reactions dioxide, water, minerals...
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