During this reaction, water molecules are exposed to light energy and release protons (hydrogen ions), highly energetic electrons and molecular oxygen (O₂). 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. Water molecules are also produced during the chemical stage of photosynthesis as the following complete equation reveals: Water molecules are present on the reagent side as well on the product side of the equation. Photorespiration occurs: (tick one answer)a)    Instead of conventional respiration processes in the lightb)    At a higher rate than conventional respiration processes in the lightc)    To generate ATP for maintenance and growth Misconception – the use of water split during photosynthetic light reactions to provide oxygen dehydrates a leaf12. © 2020. from carbon dioxide from the air and water from the soil, Mainly photosynthesis and some respiration, Photosynthesis and respiration both occur in plants, Only in the light in intact plants, although will work in the dark in a test-tube, At a higher rate than conventional respiration processes in the light, How Photosystems I and II are spatially separated between thylakoid stacks and intrathylakoid lamellae, coupled by mobile electron carriers which shuttle back and forth through the membrane, are virtually carbon/oxygen neutral as respiration = photosynthesis across an annual cycle in an untouched forest, allows dangerous uv radiation to penetrate causing cancer and blindness in animals. Light from the sun is transformed into chemical energy contained in organic material through the process of photosynthesis. However, oxygen atoms from carbon dioxide are incorporated into glucose molecules and the water molecules released in the chemical stage of photosynthesis. Which pigment converts light energy into chemical energy? In a situation in which the respiration rate is greater than the photosynthesis rate, glucose consumption is higher than glucose production. Just select (or double-click) a question to share. The general equation for photosynthesis is: 6 CO₂ + 6 H₂O + light --> C₆H₁₂O₆ + 6 O₂. (Application) How might the information gained from this lab pertaining to photosynthesis and pigments be useful to you, or how can you apply this knowledge to your everyday life as a non-scientist? At midnight, what is happening in the leaf of a plant? It will suffice … The main product is the simple sugar glucose. The “Z” scheme in photosynthesis represents: (tick one answer)a)   Photosystems I and II, and electron transport components, that are evenly distributed throughout higher plant chloroplast thylakoid membranesb)   How Photosystems I and II are spatially separated between thylakoid stacks and intrathylakoid lamellae, coupled by mobile electron carriers which shuttle back and forth through the membranec)   Shows how electrons are dislodged from chlorophyll by photons and transferred through the pigment bed to each reaction centreMisconception – (untouched) Rainforests, and forests in general, provide the O2 we breathe every year (in the past they did, as carbon was sequestered and buried in soils and as fossil fuel reserves)14. Study Flashcards On Practice Exam Questions Photosynthesis at Cram.com. Mutualism is explained as the following in this context: mitochondria and chloroplasts can offer energy and nutrients to the cell in exchange for protection. For webquest or practice, print a copy of this quiz at the Biology: Photosynthesis webquest print page. Answer. Quickly memorize the terms, phrases and much more. (tick one answer)a) Plantsb) Animalsc) Plants and animalsd) None of the above[Misconception – the major photosynthetic product from photosynthesis is glucose]6. This quiz about photosynthesis was designed to uncover various misconceptions that students often have, starting with GCSE level misconceptions and moving onto undergraduate level misconceptions. Inside the organelle, the basic unit is called the granum, and is a coin-shaped structure that, when combined with other grana, forms structures called thylakoids. In cyanobacteria, there are no chloroplasts and chlorophyll layers are dispersed in the cytosol. Now that you have finished studying Photosynthesis, these are your options: Give access to Biology Q&As to someone you like. It is the form that transports hydrogen. (Oxygen and sulfur have the same number of valence electrons.). (ii)Water: Plants absorb water from soil through roots and transport to leaves. This is primarily in the leaves, although photosynthesis also occurs in stems. Photosynthesis Quiz: Test Your Knowledge! Thinking about photosynthesis and respiration in plants, which statement is correct: (tick one answer)a) Photosynthesis is the opposite of respirationb) Photosynthesis and respiration both occur in plantsc) Only photosynthesis occurs in plants d) Respiration for maintenance and growth only occurs in the darkMisconception – All the energy captured in photosynthesis is used to synthesise carbohydrates8. What are the products of photosynthesis? Where does the energy for the process come from? Intro to photosynthesis. Photosynthesis is a series of chemical reactions by which living plants utilize carbon dioxide and water in presence of sunlight to form carbohydrates. The light-dependent reactions. Biology Important Questions Class 11 are given below.. Application of Artificial Photosynthesis The fossil fuels are limited in quantity, as well as its use increases the level of pollution and contributes towards global warming. This is an advanced quiz intended for students in AP Biology. Photosynthesis is divided into the photochemical stage, or light reactions, and the chemical stage. The Process of Photosynthesis - Image Diversity: Review this subject, read all Q&As again. However, the pure mathematical simplification of stoichiometric coefficients leads to elimination of water from the product side, making it appear that 6 molecules of oxygen (O₂), that is, 12 atoms of oxygen, are made from the 6 molecules of water, that is, 6 oxygen atoms, in the reagent side. GK Questions & Answers on Photosynthesis in Plants Set I Photosynthesis is a process through which plants prepare its own food in the form of glucose from carbon dioxide and water in … As a result, there is no positive balance of glucose or depletion of carbohydrate stores. Carbon dioxide and water. (tick one answer), a) Respirationb) Photosynthesisc) Photosynthesis and respirationd) None of the above[Misconception - Plants photosynthesise, whereas animals respire (plants do not respire).]4. [Misconception - Plants ingest all of their food from the soil. When ATP hydrolyzes and becomes ADP, energy is released and then consumed by several metabolic reactions. During photosynthesis, carbon dioxide is energetically enriched by hydrogen obtained from water. ADP phosphorylation is the addition of one inorganic phosphate molecule to the adenosine diphosphate molecule, thus creating ATP (adenosine triphosphate) and incorporating energy. In autumn, the days become shorter and nights become longer; as a result, there is a reduction in the photosynthesis rate. It has been confirmed via experiments that the most useful colors for photosynthesis are blue and red. Sex Chromosomes and Sex-Linked Inheritance. Very Short Answer Type Question [1 Mark] -Year 2014. Biology Questions and Answers … Learn vocabulary, terms, and more with flashcards, games, and other study tools. The energy released when these electrons escape is used in the phosphorylation of ADP, forming ATP. Like mitochondria, chloroplasts have their own DNA, RNA and ribosomes and self-replicate through binary division. The products of photosynthesis are. The color divisions of the electromagnetic spectrum in decreasing order of frequency are: red, orange, yellow, green, blue, indigo and violet. A level guide. This hypothesis is known as the endosymbiotic hypothesis, and discusses the evolutionary origin of mitochondria and chloroplasts. Where does most of a plant's biomass come from? Cram.com makes it easy to get the grade you want! As a result, the false impression that 6 other oxygens atoms come from the carbon dioxide is created. Multiple choice quiz of 20 questions. The end product(s) of photosynthesis in plants are oxygen plus: (tick one answer) a) Glucose b) Starch c) Starch and Sucrose d) Water Misconception – Photosynthesis is the opposite of respiration 7. Some of this energy reaches our planet. Chlorophyll is green because it reflects the green light frequency, meaning that it does not “use” the green range of the electromagnetic spectrum. Start studying Photosynthesis and Cellular Respiration Questions. The bonds in glucose can be broken and used for energy by the plants. Who was the first to study the influence of light during photosynthesis? “Dark reactions” is not a correct name for the chemical stage of photosynthesis since the reactions of the chemical stage also occur in the presence of light. For example, the typical efficiency of plants is 0.1% or 0.2-2%, the typical efficiency of crop plants is 1-2%, and the plant which has the maximum efficiency of 7-8% is sugarcane. Photosynthesis - AQA test questions - AQA. The oxygen atoms released as molecular oxygen through photosynthesis come from water. Select any question to share it on FB or Twitter. The resulting ATP is then consumed during the next chemical stage of photosynthesis to transfer energy to carbon dioxide for the formation of glucose. Because of this, some plants prepare themselves for the winter by making nutrient stores. The experiment: Plants of same species and ages are each placed under (respecting their photoperiods) light sources emitting only one of the colors of the light spectrum (violet, indigo, blue, green, yellow and red). Intense nuclear reactions in the sun release light and other energy radiation into the surrounding space. I have a very interesting question , 6CO2 + 12H2O----->C6H12O6 + 6O2 + 6H2O(photosynthesis) C6H12O6 + 6O2 ----->6CO2+6H2O+energy(respiration) from photosynthesis 6H2O and product of respiration without energy will form reactants of photosynthesis and this process will keep repeating!! The plants whose development was normal performed satisfactory photosynthesis while those with abnormal development underused the light. If this plant on another planet appears black, that must be because it is able to harness the entire spectrum of visible colors in light for energy. What are the two sets of reactions called? Here we have covered Important Questions on Photosynthesis in Higher Plants for Class 11 Biology subject.. NADPH is produced when NADP binds to one hydrogen atom. Mention the raw materials required for photosynthesis. The photolysis of water, the release of molecular oxygen, and the photophosphorylation of ADP, and the resulting of ATP and NADPH are the processes that occur during the photochemical stage of photosynthesis. (20 points) "Is this question part of your assignment? ADP is an abbreviation of adenosine diphosphate, which is two molecules of phosphate bound to one molecule of adenosine. GELI Enterprises in joint collaboration with CET Biology Academy has taken this initiative of providing Biology MCQs to Entrance Examination Applicants. In Priestley’s experiments, what was released by the mint sprig and allowed the candle to burn again? Photosynthesis occurs in the green tissue of plants. In photosynthesis, light, water and carbon dioxide react and highly energetic glucose molecules and molecular oxygen are produced. This is the currently selected item. Chloroplasts are made up of two membrane layers, the outer and the inner membranes. 2. Using manganese in an artificial system is a biomimetric approach-- it directly mimics the biology found in plants. The hydrogen ions are incorporated into hydrogen acceptor molecules (NADP) and later will be used in the synthesis of glucose during the chemical stage. In a photosynthetic organism, the rate of aerobic respiration can be superior, inferior or equal to the rate of photosynthesis. It is easy to imagine that those oxygen atoms come from carbon dioxide. The reaction is called photophosphorylation when the energy source is light, like in photosynthesis. I. FAD plays a role in cellular respiration. b) Blackmann. Water broken down by photolysis is the hydrogen donor of the reaction. 4. They enable a wider range of wavelength of incoming light to be utilized for photosynthesis. These questions are being actively studied by many scientists today. The following raw materials are required for photosynthesis: (i) Carbon Dioxide: Plants get CO 2 from atmosphere through stomata. The enzyme that catalyzes the reaction is ATP synthase. Not only the natural resources but also the renewable sources also cause different types of problems and pollution too. Practice: Photosynthesis. Manganese: Manganese is the catalyst found in the photosynthetic core of plants.A single atom of manganese triggers the natural process that uses sunlight to split water. In sulfur photosynthetic bacteria, the substance that donates hydrogen is hydrogen sulfide (H₂S) and not water. These question papers links which contain MCQs (Multiple choice questions) on Photosynthesis. The experiment is carried out with each of the colors and, after days, each plant's development is compared. Quiz over photosynthesis that focuses on how oxygen is split, providing and electron that eventually results in the formation of ATP. The sun, the center of our planetary system and a star in the Milky Way galaxy (our galaxy), is the source of the energy processed and consumed by living organisms. Particularly important is the use of solar radiation for the purposes of photosynthesis, an activity that constitutes a small but vital sector of Earth's energy budget. Though it accounts for only about 1% of the energy received from solar radiation, photosynthesis is essential to the sustenance of life. APPLICATION QUESTION ~~16. Gases do not have mass.]1. In a situation in which the rates are equal, all molecular oxygen produced by photosynthesis is used in respiration and all carbon dioxide released through respiration is consumed by photosynthesis. d. oxygen and water. There are many organisms (including all animals) that do not use photosynthesis. The answers will depend strongly on the effect of photosynthesis carried out by land and sea organisms. The photochemical stage of photosynthesis occurs mainly in the thylakoids (the green part) and the chemical stage occurs in the stroma (the colorless framework) of the chloroplasts. Therefore, green light does not favor photosynthesis (strangely, green is the range of the light spectrum that plants “dislike”). Choose another Q&A sequence to study by using the subject menu. The complete chemical equation of photosynthesis is the following: 6 CO₂ + 12 H₂O + light --> C₆H₁₂O₆ + 6 H₂O + 6 O₂. The availability of carbon dioxide is a limiting factor for photosynthesis because this gas is a reagent of the reaction. Put a tick against the answer which makes the greatest contribution to plant mass: a) from the soil b) from carbon dioxide from the air and water from the soil c) from nutrients in the soil d) from water[Misconception - Plants photosynthesise during the day, whereas they respire at night.]2. Therefore, there is no release of molecular oxygen and instead molecular sulfur (S₂) is produced. The end product(s) of photosynthesis in plants are oxygen plus: (tick one answer)a) Glucoseb) Starch c) Starch and Sucrosed) WaterMisconception – Photosynthesis is the opposite of respiration  7. This hypothesis is based  on the fact that those organelles have their own DNA, RNA and protein synthesis machinery and divide themselves through binary division like bacteria. The chemical stage of photosynthesis depends on NADPH and ATP produced through “light reactions” (the photochemical stage). The second Think About It question is an application of Learning Objective 2.5 and Science Practice 6.2 because you are explaining how the interdependent processes of photosynthesis and cellular respiration allow organisms to capture, store, and use free energy. Water used in photosynthetic light reactions: (tick one answer)a)    Is a significant proportion of leaf waterb)    Leads to dehydration and drought stress;c)    Only uses 2 mols H2O per mol O2 evolved, relative to 1000 water vapour mols transpiredMisconception – Photosystem I and II occur in pairs, coupled by the electron transport components in chloroplast thylakoid membranes13. Chlorophyll and light energy. … Flowers serve a reproductive purpose, so again, there's no reason for plants to use them for photosynthesis. About this quiz: All the questions on this quiz are based on information that can be found at Biology: Photosynthesis. The chemical equation for photosynthesis is the following: 6 CO₂ + 6 H₂O + light --> C₆H₁₂O₆ + 6 O₂. The energy incorporated into ATP is disposable (released) to other cellular reactions when ATP hydrolyzes and ADP is formed again. This survey was compiled with the kind assistance of Prof Howard Griffiths, Department of Plant Science, University of Cambridge and Dr Mark Winterbottom, Faculty of Education, University of Cambridge. Which of the following need oxygen to survive? Since enzymes catalyze the formation of organic molecules with carbon atoms from carbon dioxide, photosynthesis stops as soon as these enzymes become saturated, that is, when all their activation centers are bound to their substrates. The sun, the center of our planetary … In which organisms does photosynthesis happen? This site does not support the use of animals for education, research and testing. <= => Photosynthesis is the process whereby ? When mixed together, these colors generate white. The products are glucose and oxygen. NADP is the abbreviation for nicotinamide adenine dinucleotide phosphate cation, a hydrogen acceptor. The process of natural photosynthesis is a highly inefficient process. Light excites chlorophyll and energizes electrons that jump off the molecule. The phosphorylation is oxidative when the energy incorporated comes from the breaking down of organic molecules with oxygen as reagent, like in aerobic cellular respiration. The (light) compensation point is the light energy intensity under which the aerobic respiration rate equals the photosynthesis rate. 3. In this situation, an increase in carbon dioxide concentration will not increase the photosynthesis rate. a) Van Niel. Challenge your Facebook and Twitter friends. (tick one answer), a) Plantsb) Animalsc) Plants and animalsd) None of the above5. The chemical element at the center of the chlorophyll molecule is magnesium. Give 4 factors that affect the rate of photosynthesis. Thylakoids fill the chloroplast and an intergrana membrane permeates the interior of the organelle. The pupils: 8. a. water and carbon dioxide. 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