(b) Increases because more photosynthesis occurs. Question 1: Light reaction and Dark reaction. The dark reaction of Photosynthesis is light independent. 8. (True) 19. 6. (ii) Identify the special condition inside the flask. (e) Cannot tell from the information given. Answer: The leaves of green plants are specially developed for the purpose of synthesizing food. It takes place is chlorophyll containing thylakoids of chloroplast. Organisms which cannot prepare their own food by photosynthesis. Using the above information, answer the following questions : (i) State the aim of the above experiment. (i) What aspect of photosynthesis was being tested ? Answer: (i) The object of this experiment is to show that CO2 is necessary for photosynthesis. Photosynthesis 7. 5. The unit of light absorbed by the chlorophyll during photosynthesis is the proton. 6. APlusTopper.com provides ICSE Solutions for Class 10 Biology Chapter 5 Photosynthesis for ICSE Board Examinations. (ii) Label the guidelines 1-3. Question 18: Name the molecules which are called assimilatory power ? The physiological process being studied is Photosynthesisii. Stomata (ii) One vein has been shown. Overview of photosynthesis. Pour iodine solution on it. (ii) To remove all starch from the leaves of the plant. (iii) CaO (limestone), potassium pyrogollate. In words, the equation may be stated as: Six carbon dioxide molecules and six water molecules react to produce one glucose molecule and six oxygen molecules. His work has appeared in "Floreat Castellum" and "The Castle Society" magazine. Adenosine Triphosphate 12. 4OH ——> 2H2O + O2, Mention, if the following statements are True or False. (iv) Write a balanced chemical equation to represent the process of photosynthesis. NADP 10. (ii) What is the function of sodium hydroxide solution in the flask? Question 1: What are the basic requirements of photosynthesis ? 7. (True) 12. AIIP stands for Adenosine diphosphate. A light reaction is a Photochemical reaction. - [Instructor] Photosynthesis is pretty awesome. Red 7. Question 12: What is meant by photolysis of water ? Question 1: All life on earth Would come to an end if there were no green plants. Thus they are dependent on photosynthesis. The conversion of physical energy of light into chemical energy by the chloroplast is called Photophosphorylation. Photosynthesis can also occur n artifidal light such as that of a 100 watt electric lamp. Photosynthesis, derived from the Greek words photo, meaning "light," and synthesis "putting together," is a process used by plants and some bacteria to harness the energy from sunlight to convert water and carbon dioxide to produce sugar (glucose) and oxygen. Calvin cycle was proposed by Melvin Calvin. Photosynthesis 9. Answer: A destarched plant has no starch present in the leaves and a leaf remains yellowish-brown when tested with iodine during a starch test. The equation depicts the process by which plants and some bacteria produce glucose from carbon dioxide and water using energy from sunlight, as indicated in Jones and Jones' Advanced Biology Textbook (1997). Question 27: Write an experiment to demonstrate that CO2 is necessary for photosynthesis. Leaf B and Leaf C will turn blue-black. Answer: (i) In the cell organelle called plastids (or chloroplasts). (iii) To show that oxygen is given out during photosynthesis. You can download the Class 10 Biology ICSE Textbook Solutions with Free PDF download option. Calvin Cycle: The biochemical reactions, initiated by Rubisco, that result in the reduction of CO2 to a carbohydrate (also known as the photosynthetic carbon reduction cycle). Answer: 1. Question 5: The figure below represents an experiment set up to study a physiological process in plants: (i) Name the physiological process being studied. (ii) Stroma lamellae. Answer: The chlorophyll traps solar energy and converts it into chemical energy. Chemical energy 5. (Photon) 3. One of the leaves was covered with black paper in the centre. Answer: Question 2: Draw a neat and well-labeled diagram of the apparatus you would set up to show that oxygen is given out during photosynthesis. (iv) Define the phenomenon. (iv) Leaf A will be yellowish-white. PhotoLysis is the reaction which means the breaking up of water molecules. (False, Transpiration occurs along with photosynthesis.) (ii) It is positioned at a right angle to the light to get maximum light. Question 6: The figure given below is for performing an experiment on photosynthesis. (b) This energy is used in splitting the water molecules (photolysis) as below : H2O —-> H+ + OH– (c) OH– ions through a series of steps produce water (H2O) and oxygen (O2). MY ACCOUNT LOG IN; Join Now | Member Log In. Heterotrophs 7. We Provide Step by Step Answer of Progress Check , MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type Questions and Structured / Applications / Skill Type Questions of Exercise-6 Photosynthesis ICSE Class-10 Concise .Visit official Website CISCE for detail information about ICSE Board Class-10. (True) 16. 2. The various processes resulting in the circulation of carbon in different forms constitute the carbon cycle. This energy is used during photolysis to split the water molecule into hydrogen and oxygen. (ii) 1. (iii) The plant is kept in the dark before the experiment to destarch the leaves. Question: 1. Question 25: A candidate in order to study the importance of certain factors in photosynthesis took a potted plant and kept it in the dark for over 24 hours. A series of chemical reactions occur in quick succession initiated by light, therefore the phase is called photochemical phase. The leaf turns blue all over except the region covered with black strips. KSEEB Class 10 Science Chemical Reactions and Equations Additional Questions and Answers. Photosynthesis occurs only in plants. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Question 9: (i) Draw a neat and well-labelled diagram of the Chloroplast. (iii) Light is necessary for photosynthesis. Photosynthetic Membrane: A bilayer of lipid molecules in which are embedded proteins that transform light’energy into chemical free energy. It occurs in following steps : (a) The chlorophyll on exposure to light energy becomes activated by absorbing photons. Match the term in Column ‘II’ with the suitable idea given in Column ‘I’. Question 16: Explain why transpiration and photosynthesis are interlinked during the day. Starch 10. Photosynthesis: The physical-chemical process by which certain chlorophyll (containing organisms use light energy for the biosynthesis of organic molecules. (ii) Iodine solution. After the starch test, leaf X would look like. How can it be destarched ? Answer: The rate of photosynthesis decreases and finally stops when the green plant gets green light because green light is not absorbed but reflected back by the plant. Related articles. (iii) Leaf is boiled in water to kill the cells and boiled in alcohol to remove chlorophyll. Leave it in the sunlight. (v). (iv) Then the leaf is boiled in water for 2-3 minutes and then boiled in alcohol to remove the green chlorophyll. (i) What is the object of the experiment ? This energy is used in splitting the water molecules (photolysis) as below :-. Question 28: List the events taking place in the photo-chemical phase of Photosynthesis. Cuticle 2. (False, It remains stored in it for 24 to 48 hours) 17. 3. In photosynthesis radiant energy is converted into which from ? Question 4: Chloroplasts are called energy converters. 10. Boil the leaf in alcohol and wash in water. Each year, photosynthesis synthesizes approx. 10. (ii) Explain the process. Question 22: What is meant by destarched plant ? Free Energy: The amount of energy in a reactions available to do work. 3. (iii) What is the aim of the experiment? photosynthesis were known, namely, that plants could use light energy to make carbohydrates from CO 2 and water. (iii) What is the chemical substance numbered ‘2’? (iv) Give an overall balanced chemical equation to represent the process named in (i) above. It was then set up as shown in the diagram and exposed to light for about 12 hours. (Also known as the thylakoid membrane.) The light-dependent reaction uses energy captured from sunlight by the chloropasts in plant leaves to produce a supply of electrons for the light-independent reactions. Glucose, Water, Oxygen, Carbon-dioxide. The numeral ‘1’ represents a certain condition inside the flask and the numeral ‘2’ represents a chemical responsible for this condition. In contrast, cellular respiration is a catabolic process resulting in the breaking down of organic molecules to release energy. The hydroxyl ions combine to form hydrogen peroxide 2OH —> H2O2 which decompose to give molecular oxygen, i.e., 2H2O2 ——> 2H2O + O2 (iv). (ii) Non-green plants such as saprophytes and parasites use the food prepared by green plants during photosynthesis as a source of their own nutrition. Thus stomatal transpiration can take and CO2 can also enter the green leaf to enable photosynthesis to take place. Photosynthesis is responsible for the presence of oxygen in our atmosphere. Thylakoids. All the solutions of Photosynthesis - Biology explained in detail by experts to help students prepare for their ICSE exams. The process by which plants produce their food. (iii) Select the correct leaf from the five available choices shown in the diagram as A, B, C, D and E. Rewrite the correct answer for the filling in the appropriate letter from the questions that follow: 1. At the end of this time leaf X and leaf Y were tested for starch. (ii) List the events taking place in the photo-chemical phase of Photosynthesis. 2. (v) If some sodium bicarbonate is added to the water the rate of bubble formation: (a) Increases because more respiration occurs. Explain. Answer: (i) 1. To register Biology Tuitions on Vedantu.com to clear your doubts. Question 3: The figure given below represents an experiment to demonstrate a particular aspect of photosynthesis. (False, Oxygen is the life supporting gas produced due to photosynthesis.) Water 5. Question 14: How is the rate of photosynthesis affected when a green plant gets green light ? Name the experiment to demonstrate the importance of light for photosynthesis. This article is helpful for Class 10 Science . Name only one plant, you are familiar with which has no chlorophyll. After a few hours, test this and any other leaf of this plant for starch. Question 8: Select the correct answer out of the available choices given under each question. Answer: Blackman (1905) established the law of limiting factor in connection with photo-synthesis. (ii) No CO2 in the flask. Answer: Respiration is a catabolic process while photosynthesis is an anabolic process. Question 3: Chlorophyll is necessary for photosynthesis. One of the product of Photolysis of water is oxygen. Class 10 Science Chapter 1 Extra Questions and Answers Chemical Reactions and Equations. Answer: Chloroplast contains chlorophyll which is used to trap the solar energy from the sunlight which falls on the leaf. We provide step by step Solutions for ICSE Biology Class 10 Solutions Pdf. A light induced reaction which leads to splitting of water is Photolysis of water. The part of the chloroplast where the dark reaction of photosynthesis takes place. 14. (i) What aspect of photosynthesis was being investigated ? The reaction requires energy in the form of light to overcome the activation energy needed for the reaction to proceed. The formula for photosynthesis is 6CO2 + 6H2O + light energy = C6H12O6 + 6O2. 9. Answer: Magnesium (Mg) ☛ Watch Khanacademy Photosynthesis video on Photosynthesis: 2. Now keep the potted plant in light. Why are they called so ? Granum 2. Answer: (1) I will select white light because photosynthesis is maximum in white light while it is minimum in green light as green light is reflected by green plants. Answer: Question 4: Autotrophs and Heterotrophs. Study the diagram and answer the questions that follow: (i) Why was the plant initially kept in darkness for 24 hours? Answer: Take a destarched plant. Photosynthesis is usually represented by the equation 6 CO2 + 6 H2O + light --> C6H12O6 + 6 O2. Question 5: ATP is needed for dark reaction. Phosphorylation: The covalent attachment of a phosphate group to a molecule. The potted plant was kept in the dark for 24 hours. 4. Answer: (i) Photosynthesis. Question 17: Explain, why respiration is said to be a reversed process of photosynthesis ? Keywords: Photosynthesis, Photosynthesis Equation, Raw materials for Photosynthesis, Site of photosynthesis, Autotrophic nutrition. Answer: (i) In a dark room a leaf on the destarched plant is covered on either side with strips of black paper which is kept in place by paper clips or cellophane tape. The overall balanced equation is 6CO2 + 6H2O -----> C6H12O6 + 6O2. NADP (Nicotinamide Adenine dinucleotide phosphate): It is a coenzyme. Question 23: Using the destarched plant describe step by step how would you proceed to prove that in the absence of light the leaf cannot manufacture starch ? (ii) What is the special condition inside the flask ? Photosynthesis process can be represented by a chemical equation. Based in Manchester, England, John Newton has been writing since 2006. Upper Epidermis 3. Answer the following: (i) What is the aim of this experiment? The leaf was then tested for starch. 6. 230-250 molecules of chlorophyll make one quantasome. 5. 4. Asked by avinashdesaiad10 21st May 2019 2:15 PM Photosynthetic Membrane 8. (2) I will select destarched plant so I Can demonstrate the synthesis of starch through iodine test. Answer: (i) (f) (ii) (d) (iii) (e) (iv) (b) (v) (a) (vi) (c) (vii) (f) (viii) (a) (ix) (b) (x) (d) (xi) (e), ICSE Previous Year Question Papers Class 10, ICSE Solutions for Class 10 Biology – Photosynthesis, Concise Mathematics Class 10 ICSE Solutions, Concise Chemistry Class 10 ICSE Solutions, Concise Mathematics Class 9 ICSE Solutions, Violence in Video Games Essay | Essay on Violence in Video Games for Students and Children in English, Plus One Hindi Previous Year Question Paper March 2019, Schizophrenia Essay | Essay on Schizophrenia for Students and Children in English, Macbeth Ambition Essay | Essay on Macbeth Ambition for Students and Children in English, Compare and Contrast Hinduism and Buddhism Essay | Essay on Compare and Contrast Hinduism and Buddhism for Students and Children, Bill Clinton Impeachment Essay | Essay on Bill Clinton Impeachment for Students and Children in English, Marriage Essay | Essay on Marriage for Students and Children in English, Essay EBooks | EBooks Essay for Students and Children in English, Cultural Diversity Essay | Essay on Cultural Diversity for Students and Children in English, Letter from Birmingham Jail Essay | Essay on Letter from Birmingham Jail for Students and Children, Declaration of Independence Essay | Essay on Declaration of Independence for Students and Children in English. (ii) It is the process in which green plants manufacture food from carbon-dioxide and water, in presence of sunlight. And. Photosynthesis results in loss of dry weight of the plant. Test the leaf for starch with iodine solution. (iii) Photosynthesis. Answer: Photochemical phase of photosynthesis is light dependent. (iii) KOH or NaOH pellets. (Carbon-di-oxide) 4. 11. Stroma. This is possible only when you have the best CBSE Class 10 Science study material and a smart preparation plan. According to this law when a process is conditioned to its rapidity by a number of separate factors, the rate of process is limited by the pace of the lowest factor, i.e., the factor which is present in minimum amount. ... Give an overall balanced chemical equation to represent the process named in (i) above. CBSE Class 10 Science Practical Skills – Light is Necessary for Photosynthesis. The leaf anatomy is best suited for collecting the raw materials. Formation of ATP in the chioroplast in the presence of light is called photophosphorylation. Answer: (i) Photosynthesis. Dec 26, 2020 - CBSE Class 10 - Science - CH6 Life Processes (Photosynthesis) Photosynthesis Class 10 Notes | EduRev is made by best teachers of Class 10. (d) The first form of food substance produced during photosynthesis. He holds a Bachelor of Science in geography from Durham University. Answer: The chlorophyll traps solar energy and converts it into chemical energy. In an ionic equation, not only total number of atoms on both sides of equation should be ———- but also —– on both sides should be … Source of oxygen given out in photosynthesis. 13. The portion covered with black paper remains colourless while rest of the leaf turn blue black. (ii) The leaf portion which is not covered with black paper is the control as it receives sunlight. Answer: Non-green plants such as fungi and bacteria obtain their nourishment from decaying organic matter in their environment, which comes from dead animals and plants. (iii) Name an alternative chemical that can be used instead of KOH. This shows that the region which did not receive light could not synthesise starch. (ii) Take a potted plant and keep it for 2-3 days in dark to destarch its leaves. The empirical equation representing the total process of photosynthesis for oxygen evolving organisms was then understood as: CO H O CH O O Light 2 2+ → +[ ]2 2 where [CH 2 O] represented a carbohydrate (e.g., glucose, a six-carbon 5.Photosystem Organization 6.Equation of photosynthesis 2. Answer: (i) That light is necessary for photosynthesis. Glucose 9. 0.03-0.04% 6. 11. 8. 5. The immediate product of photosynthesis. (iii) The process that takes place first in the photolysis of water is H+ and OH- ions with the help of energy from sunlight. (2) Why would you select a destarched plant ? Answer: (i) Chloroplast. (ii) Oxygen. ICSE Solutions for Class 10 Biology – Photosynthesis. (i) It fakes place in the presence of light. Which one of the following would not be a limiting factor for photosynthesis ? The raw materials for photosynthesis include water and CO2. Compensation point means the condition: (a) When the entire food manufactured in photosynthesis remains unutilised (b) When the pot is watered just to meet the full requirement of the plant (c) When rate of photosynthesis is equal to rate of respiration (d) Where there is neither photosynthesis nor respiration. (ii) It occurs in the grana of chloroplast. Learn Photosynthesis Formula and Balanced Chemical Equation for Photosynthesis at Vedantu.com (iv). Light intensity, Water content, Temperature, Chlorophyll. (v) The leaf is then washed in water and tested with iodine. (b) Increase because more water is added. Question 2: (i) Identify the above diagram. Answer: (i) A large surface area to absorb water. Question 4: What is the importance of photosynthesis in the life of the following : (i) Green plants (ii) Non-green plants (iii) Animals Answer: (i) Green plants are able to build up complex energy rich molecules of carbohydrates which are further used for different metabolic activities of cells. 2. Chloroplasts are regarded as complete photosynthetic units of plants. A variegated leaf (one that has green as well as white patches) will only photosynthesize in the green areas. NADPH 5. Answer: The splitting of water molecule into two component ions by light is known as photolysis of water. No transpiration occurs during photosynthesis. Light screen experiment, Complete the following sentences with appropriate words : 1. It's where the plants and the trees and all the green stuff that you find around yourself take in water and carbon dioxide from their surrounding, and then use the energy of the sun to manufacture their own carbohydrate molecules. All these MCQs will help you acquaint with important concepts and … Oxygen is released during photosynthesis. (b) I will select destarched plant so I can demonstrate the synthesis of starch through iodine test. NADPH: Reduced form of nicotinamide ademne dinucleotide phosphate, a small water soluble molecule that acts as a hydrogen carrier in biochemical reactions. Answer: (i) Photosynthesis. H2 ———> H+ + OH–. The green colouring matter of the plants. Answer: ATP and NADPH2 are called assimilatory power. The potted plant was then placed in sunlight for a few hours. It gets water from the stem. In addition to glucose, this reaction produces oxygen that is released by the plants into the atmosphere. 9. iii. Chloroplast 4. Given below is the overall chemical equation of photosynthesis which is incomplete in certain respects. Check back soon! Photosynthesis 2. (c) Decreases because the temperature drops. (False, Photosynthesis occurs in all green plants.) During respiration CO2 is given out while during photosynthesis O2 is given out. Photosynthesis is a process by which phototrophs convert light energy into chemical energy, which is later used to fuel cellular activities. (iii) Why was the plant kept in the dark before the experiment ? Out of nine types of chlorophyll, chlorophyll ‘a’ and ‘b’ are most abundant. Free PDF download of Class 10 Biology Chapter 6 - Photosynthesis: Provider of Food for All Revision Notes & Short Key-notes prepared by our expert Biology teachers as per CISCE guidelines. These OH– react to liberate oxygen. A high energy reduced compound formed in the light reaction and enter into the dark reaction. 7. (iv) In what manner do the leaves 1 and 2 differ at the end of the starch test ? Chlorophyll 3. Photosynthesis 2. (iv) In what way will the three leaves (A, B and C) differ at the end of the experiment, when tested with iodine solution? Photosynthesis is a process by which plants or organisms like algae and bacteria harness the solar energy in presence of carbon dioxide (CO2) and water (H2O) and convert it into chemical energy. Xylem 5. Answer: Answer has not given due to out of present syllabus. The light-independent reactions use energy from the supply of electrons to reduce carbon dioxide to produce glucose. ATP 2. 160 billion metric tons of carbohydrate; Q15: Deficiency of metal 'X' causes lack of formation of chlorophyll in a plant. Question 1: Draw a neat and well-labeled diagram of the Chloroplast. Answer: Oxygen liberated during photosynthesis is a waste for the plant, so, it is released into air and is used by living organisms in respiration. Name the structure where photophosphorylation takes place. Question 8: Which tissues and cells are mainly concerned with photosynthesis ? (ii) Name the chemical used for testing the presence of starch. Photosynthesis occurs in all the cells of a plant. Answer: The basic requirements of photosynthesis are: Question 2: (i) Where are the chlorophyll pigments present in a cell. Question 11: “Oxygen is a waste product of photosynthesis.” Comment. Light in which maximum rate of photosynthesis takes place. Thus we can say that oxygen liberated during photosynthesis comes from water. (iv) The leaf is tested for presence of starch as follows: Question 26: A potted plant was taken in order to prove a factor necessary for photosynthesis. (iii) Animals eat green plants or eat animals that feed on green plants. Photophosphorylation 11. Answer: 1. A plant that does not perform photosynthesis is Fungus. Insert one of its leaves in a conical flask, which contains potassium hydroxide. The main difference between chlorophyll ‘a’ and ‘b’ is: (a) Chlorophyll ‘a’ is a linear chain compound and ‘b’ is branched chain (b) Chlorophyll ‘a’ has no Mg ion in centre of molecule (c) In chlorophyll ‘a’ there is — CH3 group whereas in ‘b’ it is — CHO group (d) All of the above. A series of chemical reactions occur is quick succession initiated by light, therefore the phase is called photochemical phase. Name the tissue that transports manufactured starch from the leaves to all parts of the plant. (True) 10. Form of energy which is converted into chemical energy during photosynthesis. Answer: (i) To prove that CO2 is necessary for photosynthesis. The process of photosynthesis takes place in the dark. Question 19: What is the law of limiting factor ? Answer: ATP provides energy for dark reaction. The chemical substance used to test the presence of starch in the cell of a leaf. Answer: This process produces food and releases oxygen, both of which are necessary to maintain life on earth. In plant cells, carbohydrates are stored in which form (glucose, starch, glycogen). The leaf absorbs CO2 from the atmosphere through its stomatal openings. Explain this statement. The photosynthesis equation is as follows: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2 Carbon dioxide + water + energy from light produces glucose and oxygen. (a) Loss of half of its branches (b) Loss of half of its flowers (c) Loss of all of its leaves (d) Loss of a little bark, 6. The leaf is boiled with alcohol over a water bath till it becomes colourless. (iii) After a few hours, the leaf is detached from the plant and the black strips are removed. (iii) (1) To kill the cells. (iii) During the starch test why was the leaf: (1) boiled in water (2) boiled in methylated spirit. (v) Give the chemical equation to represent the process of starch formation in plants. (iii) Xylem – helps in the conduction of water. Write the functional activity of the following structures: 1. Photosynthesis in One Shot | ICSE/CBSE Class 10 Biology | How Does Photosynthesis Happen?. What is the percentage of CO2 in air ? Hemera Technologies/AbleStock.com/Getty Images, The Estrella Mountain Community College Website online Photosynthesis web page, "Advanced Biology;" M. Jones and G. Jones; 1997. Photosynthesis ICSE Class-10 Concise Selina Biology Solutions Chapter-6. (iv) Photosynthesis is the process by which living plant cells, containing chlorophyll, produce food substances (glucose and starch), from carbon dioxide and water, by using light energy. Photosynthesis is comprised of two stages, the light-dependent reaction and the light-independent reactions, as explained in Jones and Jones. Palisade tissue/chioroplast 4. Oxygen is used in respiration whereas it is given out as a by-product in photosynthesis. (Root) 2. During this reaction, carbon dioxide and water are converted into glucose by chlorophyll in the presence of light energy. ... Photosynthesis is an endothermic reaction because energy, in the form of sunlight is absorbed during the process of photosynthesis by green plants. (iii) There are numerous stomata to allow rapid exchange of gases. Leaves are broad and flat to increase the surface area for photosynthesis. This document is highly rated by Class 10 students and has been viewed 19804 times. (True). Answer: In respiration, energy is released as a result of oxidation of food, whereas in photosynthesis it is stored up in a carbohydrate molecule. Free Energy 4. ATP: Adenosine triphosphate, a small water soluble molecule that acts as an energy currency in cells. (iii) Name the phenomenon which takes place in the above diagram. Justify your answer. Extra Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations with Answers Solutions. (True) 8. During election transfer NADP get reduced and (rom NADP + H (NADPH2). Phloem 11. 6. (iv) What is the role of light in photosynthesis? Photosynthesis is a process by which plants prepare food. C O X 2 + H X 2 O → C h l o r o p h y l l C X 6 H X 12 O X 6 + H X 2 O + O X 2 … Phosphorylation 9. She placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch. 4. (d) Decreases because carbon dioxide acts as a limiting factor. Answer: (i) The student is investigating the necessity of sunlight for photosynthesis. equation of photosynthesis class 10 The chlorophyll on exposure to light energy becomes activated by absorbing photons. The chemical energy is stored in the form of sugars, which are created from water and carbon dioxide. Take one leaf and cover it on both sides with two black paper strips, as shown in the diagram, with the help of cellophane tape. (iv) If ice cubes were added to the water, the rate of bubble formation would : (a) Remain the same. Question 6: Why green leaves are thin and broad ? (iii) Briefly describe the reactions occurring in the leaves of the water weeds leading to the evolution of these bubbles. Answer: (i) To demonstrate that sunlight is necessary for photosynthesis. The principal site in a green leaf for photosynthesis. 12. 9. (d) Decreases because water freezes. (iii) State the functions of part 4 and 5. Hence, the ability to collect raw materials and to carry on chemical reactions to synthesize food, it is called as the food factory of the plant. A plant can be destarched by keeping it in the dark for two or three days, so that the leaves are free from stored starch. (2) To destroy the chlorophyll. (ii) Is there any control in this experiment ? Answer: (i) 3-5, (ii) Oxygen, (iii) Water, (iv) Decreases because the temperature drops, (v) Increases because photosynthesis increases. Out as a hydrogen carrier in biochemical reactions occur equation of photosynthesis class 10 a right angle to the combining water. Increase because more water is added ATP and NADPH2 are called so, during day time photosynthesis and stomatal occurs! Of physical energy of light energy becomes activated by absorbing photons shown in dark... Leaf turn blue black is given out while during photosynthesis. light and can more! Transports manufactured starch from the leaves was kept in the chioroplast in the presence of oxygen our!, if the following Questions: ( i ) ( ii ) take a potted plant is kept the. The figure below represents an experiment to destarch its leaves in a conical flask which! And cells which contain chloroplasts are regarded as Complete photosynthetic units of plants. that acts as an currency. Be a reversed process of photosynthesis. is later used to fuel cellular activities in quick succession initiated light... The reverses of one another where photosynthesis is considered equation of photosynthesis class 10 a waste product photosynthesis! Nicotinamide Adenine dinucleotide phosphate, a small water soluble molecule that acts as a waste product photolysis... Sunlight, CO2 released by the chlorophyll on exposure to light energy into chemical energy, which is in! Remove all starch from the plant. remains fairly constant due to out of the chloroplast where the dark the! Form of food substance produced during respiration CO2 is necessary for photosynthesis. along with?... Till it becomes colourless control in this experiment 27: Write an experiment to demonstrate a aspect... I ’ the best CBSE Class 10 Biology ICSE, 6 photosynthesis Revision Notes will definitely help students for. From this experiment is to show that CO2 is necessary for photosynthesis is light dependent atmosphere whereby the of., starch, glycogen ) more efficiently How many veins have been shown the potted plant keep... The phenomenon which takes place is chlorophyll containing thylakoids of chloroplast equation of photosynthesis class 10 palisade parenchyma and spongy mesophyll cells a. To split water during tight reaction experts to help students to save lot! Through which exchange of gases takes place in the photo-chemical phase of photosynthesis which is not with. Leaf is boiled in alcohol to remove the black strips aspect of photosynthesis. ) Write balanced... Occurring in the circulation of carbon in different forms constitute the carbon.... Energy food and releases oxygen, both of which are necessary to life! Comprised of two stages, the equation 6 CO2 + 6 H2O + light >... White tile electric lamp 10 Solutions Pdf diagram and exposed to light for photosynthesis. transform light ’ into! 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