Photosynthesis prepared by Academic team of Entrancei . Solution:-, (d) Grass and grasshopper (mode of nutrition) Question 1: Define transpiration. 8. The related topics in this chapter are chlorophyll, regulation of stomatal opening for letting in carbon dioxide, the process of photosynthesis, adaptations in the leaf to perform photosynthesis, factors affecting photosynthesis and carbon cycle. (b) The kind of plastids found in the mesophyll cells of the leaf. Photosynthesis: This module focuses on mechanism of photosynthesis. (c) Then place it again in hot water to soften it. Question 1. ICSE Class 10 Biology Important Questions 1. The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is, 3. (cytoplasm, chloroplast, ribosomes), (d) The dark reaction of photosynthesis is known as ………….. (Hill reaction, cyclic phosphorylation, Calvin cycle), (e) In the flowering plants, food is transported in the form of ……………… (sucrose, glucose, starch), (a) The site of light reaction in the cells of a leaf grana, (b) The chemical substance used to test the presence of starch in the cell of a leaf is iodine solution. b. (a) Respiration and photosynthesis (gas released), (b) Light and dark reactions (products formed), (c) Producers and consumers (mode of nutrition), (d) Grass and grasshopper (mode of nutrition), (e) Chlorophyll and chloroplast (part of plant cell). ATP (Adenosine triphosphate) stores energy in the cells. Oxygen is the element which all the organisms 2-4 and even 5 are getting from No. ShikshaHouse. Photosynthesis is the physiological process that releases the bubbles of oxygen. What aspect of photosynthesis was being investigated? Complete the following by filling the blanks 1 to 5 with appropriate words/ terms/ phrases: To test the leaf for starch, the leaf is boiled in water to …………… (1). No living being can remain alive without oxygen. During this period, all the starch will be removed from the leaves and stored in the storage organs. (g) The part of chloroplast where the dark reaction of photosynthesis takes place. (d) Spread the leaf in a dish and pour iodine solution on it. (g) Photosynthesis is considered as a process supporting all life on earth. The chloroplasts are concentrated in the upper layers of the leaf which helps cells to trap the sunlight quickly. Correct Statement: Respiration results in loss of dry weight of the plants. The presence of starch will be indicated by a blue-black colour. (a)The hydrogen ions (H+) are picked up by a compound NADP (Nicotinamide adenine dinucleotide phosphate) to form NADPH. (b) Boil the leaf in methylated spirit over a water bath till it becomes pale-white due to the removal of chlorophyll. Why is it necessary to place a plant in the dark before starting an experiment on photosynthesis? Answer : Balsam is a herbaceous plant that loses too much of water by excessive transpiration, i.e., the rate of transpiration is more than the rate of absorption. It is then placed in a dish and iodine solution in added. 1. Photosynthesis is the biological process which was the starting point of the whole chain. (a) Guard cells: They regulate the opening and closing of stomata and thus regulate the entry of carbon dioxide through the stomata. (c) What is the purpose of keeping a snail in test-tube B? Solution:-, (e) Green plants are consumers. With the rise in temperature, the rate of photosynthesis rises. The leaves will not show the presence of starch. (d) Why does test-tube B have more bubbles of oxygen? Photosynthesis in green plants is directly and indirectly dependent on so many plant structures. So the various experiments on photosynthesis can be carried out effectively. Why is it necessary to place a plant in the dark before starting an experiment on photosynthesis? Test to determine the presence of starch in a leaf: Given alongside is the diagram of an experimental set-up: (a) What is the objective of this experiment? We know that the oxygen is consumed during respiration in plants hence it cannot be demonstrated at the daytime, as plants carry out respiration at night. Which one chemical reaction occurs during photosynthesis? Answer : Odd term : Phagocytosis. A plant used for an experiment on photosynthesis should initially be placed in the dark for 24 to 48 hours to distarch the leaves. However, in a sense, even this oxygen is not a waste because all organisms require it for their existence including the plants. Is there any control in this experiment? The leaf now becomes hard and brittle. We provide step by step Solutions for ICSE Biology Class 10 Solutions Pdf. The specific function of light energy in the process of photosynthesis is to, a) reduce carbon dioxide b) synthesise glucose, c) activate chlorophyll d) split water molecule, 8. (c) Place the apparatus in the sun for a few hours. (1) Respiration occurs in all living organisms. (4) The carbon dioxide is used and released in the process of photosynthesis. Are the following statements true or false? (b) What phenomenon do the think arrows A and B indicate respectively? (d) Write a balanced chemical equation to represent the process of photosynthesis. (a) Dark reaction of photosynthesis occurs during night time. Photosynthesis is an important activity of all green plants which are able to synthesis food from carbon dioxide and water in the presence of chlorophyll and light energy. (c) Stroma is ground substance in chloroplast. Chlorophyll is the green colouring matter found in plants. It is next boiled in methylated spirit to remove chlorophyll. Average . Chlorophyll is the foundation site for the photosynthesis in green plants. Hence most leaves have the upper surface more green and shiny than the lower one. (c) The compound which stores energy in the cells. Extramarks, an e-learning website offers online tutorials for ICSE class 10 Experiments on Transpiration Chapter. Chloroplasts are cell organelles, situated in the cytoplasm of plant cells. They help to regulate the rate of transpiration by opening and closing the stomata. Fill in the blanks with the appropriate answer from the choices given in the brackets. Describe the main chemical changes which occur during photosynthesis in: The light reaction occurs in two main steps: (1) Activation of chlorophyll – On exposure to light energy, chlorophyll becomes activated by absorbing photons. (a) The rate of photosynthesis continues to rise as long as the intensity of light rises. Carbon dioxide is used up and oxygen is released. Chloroplasts are minute oval bodies bounded by a double membrane, and their interior contains closely packed flattened sacs arranged in piles lying in a colourless ground substance called the stroma. 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(c) Place potassium hydroxide in the beaker instead of lime water. It takes place in the presence of light. Non-green plants such as fungi and bacteria obtain their nourishment from decaying organic matter in their environment. (d) The first form of food substance produced during photosynthesis. To study the effect of sunlight on the rate of photosynthesis. The leaf is placed in warm water to soften it. (a) What aspect of photosynthesis was being tested? These notes are totally based on latest Biology textbook of ICSE Board. (h) The tissue that transports manufactured type of starch from leaves to all parts of the plants. Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal cells, Cell wall and Nucleus. 6. What aspect of photosynthesis was being investigated? Poor. Respiration results in loss of dry weight of the plants. Mention one difference between the following on the basis of what is given in brackets. The raw materials for the photosynthesis are water, carbon dioxide and sunlight. Chlorophyll is the green pigment present in cell organelles called chloroplasts. No, the experiment will not work satisfactorily because, as mentioned in the above statement carbon dioxide is very important in the photosynthesis. Photosynthesis in green plants is directly and indirectly dependent on so many plant structures. Given reason. The main function of the stomata is to let in CO2 from the atmosphere for photosynthesis. They are present mainly in the mesophyll cells and in the guard cells of stomata. ICSE Solutions for Class 10 Biology – Photosynthesis ICSE SolutionsSelina ICSE Solutions APlusTopper.com provides ICSE Solutions for Class 10 Biology Chapter 5 Photosynthesis for ICSE … The region, which contains starch, turns blue-black colour and the region, which does not contain starch, turns brown colour. (a) The student wanted to show that sunlight is necessary for photosynthesis. Respiration results in loss of dry weight of the plants. This matter comes from dead animals and plants, which in their own turn were dependent on photosynthesis. Oxygen is used up and carbon dioxide is released. Photosynthesis 10th Science ICSE Chapter 31 Marketing along with videos,solved papers and worksheets.These are helpful for students in doing homework or preparing for the exams The pigment chlorophyll is contained in the walls of thylakoids. (d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. How would you demonstrate that green plants release oxygen when exposed to light? With four organisms 1-4. The rate of photosynthesis increases up to the temperature 35oC after which the rate falls and the photosynthesis stops after 40oC. Give reason. Oxygen supports all life on earth. (d) The dark reaction of photosynthesis is known as…………… (Hill reaction, cyclic phosphorylation, Calvin cycle). The starting point of any food chain is always a plant. Place the leaf in a Petri dish and pour iodine solution over it. Here, we present set 1 of Photosynthesis flashcard notes. Solution:-. Animals are heterotrophic (different nutrition). Solution:-. So, there is no starting point or ending point in the carbon cycle. To obtaining expected result replace the lime water from potassium hydroxide because it absorbs carbon dioxide. (b) Explain the physiological process as mentioned above in (a). (ii) Dark reaction. This reaction is known as photolysis of water. Free PDF download of ICSE Class 10 Biology revision notes and short key-notes to score more marks in your exams, prepared by our expert Biology teachers as per CISCE guidelines. During this period, all the starch will be removed from the leaves and stored in the storage organs. Plants also store excess sugar by synthesis of starch Heterotrophs, including humans, may completely or partially consume plants for fuel and raw materials. ... Download Formulae Handbook For ICSE Class 9 and 10. The water is then distributed in the mesophyll tissue. (1) Photosynthesis occurs only in green plants and photosynthetic bacteria. The time gap between the light and dark reaction is less than one thousandth of a second. (b) Cuticle The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because, a) starch is immediate product of photosynthesis, b) glucose formed in photosynthesis soon gets converted into starch, 2. Question 1 (a) Name the following: [5] (i) The organization which procures and supplies blood during an emergency. (3) Respiration consists of two stages, they are inhalation and exhalation. Excellent. Also most of the oxygen produced during photosynthesis diffuses out into the atmosphere through the stomata. (a) What aspect of photosynthesis was being tested? Correct Statement: Dark reaction of photosynthesis is independent of light and occurs simultaneously with light reaction. 9. (a) The category of organisms that prepare their own food from basic raw materials. Grass is a producer. Therefore, the plant was kept in the dark before the experiment. (d) Destarching of the leaves of a potted plant can occur only at night. In the dark reaction, ATP and NADPH molecules (produced during light reaction) are used to produce glucose (C6H12O6) from carbon dioxide. Correct Statement: Green plants are producers. (c) Starch produced in a leaf remains stored in it for 2-3 weeks before it is used by other parts of the plant. Photosynthesis occurs in plants and some bacteria. Solution:-, (f) Photosynthesis results in loss of dry weight of the plants. The presence of starch is indicated by a blue-black colour. (d) Write a balanced chemical equation to represent the process of photosynthesis. 12. (h) Photosynthesis occurs only in cells containing chloroplasts. You can watch our video lessons to understand different types of transpiration such as lenticular transpiration, cuticular transpiration and stomatal transpiration. Water is taken up by the roots from the soil, sent up through the stem and finally brought to the leaves (site of photosynthesis) through the xylem tissue. (i) Cell Cycle and Cell Division: Cell cycle - Interphase (G1, S, G2) and M.phase Cell Division: Mitosis and its stages. If a green plant is kept in bright light, it tends to use up all the CO2 produced during respiration, for photosynthesis. (d) Why does test-tube B have more bubbles of oxygen? Enumerate the steps involved in testing a green leaf for the presence of starch. Oxygen is released during photosynthesis. This increases the rate of photosynthesis in the plant placed in test tube B. Complete the following food chains by writing the names of appropriate organisms in the blanks: (ii) Grass/Corn → Mouse → Snake → Peacock. ICSE Class 10th Biology Photosynthesis MCQS. (d) Before starting the experiment, it is necessary to destarch the leaves of the plant by keeping the plant in complete darkness for 48 hours. The plant in test tube B has more concentration of CO2 available because the snail releases CO2 during respiration. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. There is no start point or end point in the carbon cycle, the carbon is constantly circulated between the atmosphere and the living organisms. Respiration occurs in all living organisms. Extra Questions for Class 10 Science Chapter 6 Value Based Questions. Chloroplasts are the kind of plastids found in the mesophyll cells of the leaf. (d) Xylem tissue in the leaf veins In the flowering plants, food is transported in the form of Sucrose. Solution:-. Correct Statement: Starch produced in a leaf is stored temporarily in the leaf until the process of photosynthesis. Complete the following food chains by writing the names of appropriate organisms in the blanks: 14. d. Describe step by step, how the candidate proceeded to test the leaf for the presence of starch? (d) Would you take any step before starting the experiment? Why is it not possible to demonstrate respiration in a green plant kept in sunlight? To register for our free webinar class with best Biology tutor in India. It is next boiled in methylated spirit to ……………(2). d.The student dipped the leaf in boiling water for a minute to kill the cells. (c) Carbon dioxide released by the snail during respiration is used by the plant for photosynthesis. b. (b) The chemical substance used to test the presence of starch in the cell of a leaf is…………… (CaCl2, iodine solution, Benedict solution). 2. These are also found in the guard cells of stomata and in the outer layers of young green stems. Give reason. A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to, c) ensure that no photosynthesis occurred, d) ensure that the leaves are free from starch, 9. Fill in the blanks with the appropriate answer from the choices given in the brackets. 11. (e) Draw a neat diagram of a chloroplast and label its parts. If so, state it. Dip a leaf in boiling water for a minute to kill the cells. This page consists of solutions of all questions asked in ICSE Biology Photosynthesis. Why is it not possible to demonstrate respiration in a green plant kept in sunlight? A plant used for an experiment on photosynthesis should initially be placed in the dark for 24 to 48 hours to destarch the leaves. The correct order in a logical sequence with regard to photosynthesis be. The appearance of a blue-black colour on the leaf is indicative of the presence of starch. The initiation of photosynthesis takes place when the chlorophyll molecule traps the light energy. / The role of sunlight in photosynthesis is being investigated. Solution:-. This layer is thicker on the upper surface than the lower one. All life owes its existence to chlorophyll. to remove the pre-existing starch from the storage organs. Rewrite the terms in the correct order so as to be in logical sequence with regard to photosynthesis: (i) water molecules, (ii) oxygen, (iii) grana, (iv) hydrogen and hydroxyl ions, (v) photons. When sufficient gas gets collected, a glowing splinter will be introduced in the test tube, which will burst into flames. The region, which contains starch, turns ……………. A basic understanding of Meiosis as a reduction division (stages not required). To test the leaf for starch, the leaf is boiled in water to kill the cells. The region, which contains starch, turns blue-black and the region, which does not contain starch, turns brown. (b) Cuticle: Cuticle is transparent and water proof due to which light can penetrate this later easily. (f) Chemical equation for photosynthesis: Return to Concise Selina ICSE Biology Class-10, Heat and Energy Concise Class-9 ICSE Physics Selina Publishers, Excretory System ICSE Class-10 Concise Selina Biology Solutions, ICSE History and Civics 2020 Paper Solved Class-10 Previous Year…, Work and Energy HC Verma Que for Short Ans Solutions Ch-8 Vol-1, HC Verma Solutions Vol-2 Concept of Physics Bharti Bhawan Publishers, ICSE English-2 Literature 2020 Paper Solved Class-10 Previous Year…, Heat and Temperature Obj-2 HC Verma Solutions Vol-2 Chapter-23, ICSE Commercial Studies 2020 Solved Paper Previous Year Question, Privancy Policy | Sitemap | About US | Contact US, Photosynthesis ICSE Class-10 Concise Selina Biology. A. (e) Phloem tissue in Leaf Veins Starch produced in the leaf remains stored in it until the night before it is used by other parts of the plant. Complete the following by filling the blanks 1 to 5 with appropriate words/ terms/ phrases: To test the leaf for starch, the leaf is boiled in water to (1) ……………. (e) The starting point of carbon cycle is the release of CO2 by animals during respiration. (i) In this phase, light plays a key role. Name the following: a. Grasshopper is a primary consumer (herbivore) and directly feeds on producers like grass. (e) Phloem Tissue in the Leaf Veins: The prepared food is transported from leaves to all parts of the plant by the phloem tissue. During this stage, light energy is converted into chemical energy. (e) The phloem transports the photosynthetic products from the leaf to the other parts of the plant. (h) The tissue that transports manufactured type of starch from leaves to all parts of the plants. How do non-green plants such as fungi and bacteria obtain their nourishment? Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch. (b) Then boiled the leaf in methylated spirit over a water bath till it becomes pale-white due to the removal of chlorophyll. b. Give reason in support of your answer. “Oxygen is a waste product of photosynthesis.” Comment. Animals derive their food from plants either directly by eating their part, or indirectly by eating the plant-eater. (a) The candidate dipped the leaf in boiling water for a minute to kill the cells. (f) Photosynthesis results in loss of dry weight of the plants. Our specialist teachers have answered these exercises to help you with your exam preparation to achieve good marks in the subject. (d) A plant and a snail are kept in test tube B. (b) Photosynthesis is a physiological process by which plant cells containing chlorophyll produce food in the form of carbohydrates by using carbon dioxide, water and light energy. (d) Test the gas in the test-tube. Thus, we can say that all life owes its existence to chlorophyll. (b) The kind of plastids found in the mesophyll cells of the leaf. Short Questions. If so, state it. (e) Give an example of a water plant that can be used in the above experiment. Photons, grana, water molecules, hydrogen and hydroxyl ions, oxygen. If the rate of respiration becomes more than the rate of photosynthesis, plants will: a) continue to live, but will not be able to store food, c) grow more vigorously because more energy will be available, d) stop growing and die gradually of starvation. Describe the main chemical changes which occur during photosynthesis in: Photosynthesis | Importance of Photosynthesis | ICSE Class 10 Biology Chapter 6 | Selina Concise Solution | Umang 2020 | #Vedantu9thand10thEnglish with Give reason in support of your answer. (c) Name the biological process which was the starting point of the whole chain. A perfect student guide for Biology that incorporates Notes, MCQ, FIll in the blanks, short Q&As, and other relevant objective type questions for all chapters in the Biology textbook as per the latest Class 10 ICSE Board Exam syllabus with solutions.. Given below is the representation of a certain phenomenon in nature. Share your Results: Facebook Twitter Google+ VK. Oxygen is released as a by-product. All the other three terms are concerned with processes in plants. The leaves will not show the presence of starch. (d) Would you take any step before starting the experiment? Therefore, they are called autotrophs (self-nutrition). (b) No, the experiment will not work satisfactorily, as the beaker contains lime water and not potassium hydroxide to absorb CO2. He took a potted plant and kept in the dark for over 24 hours. 4. (2) The leaf was boiled in methylated spirit to dissolve chlorophyll. Given below is a schematic diagram to illustrate some aspects of photosynthesis. (a) Respiration and photosynthesis (gas released) Practice biology sample question papers to score high in exams. Thus, the release of CO2 cannot be demonstrated. This matter comes from dead animals and plants. The gas released during respiration is carbon dioxide. Place the set up in the sun light for a few hours. (f) Write the overall chemical equation for the above process. (c) Mesophyll cells (both palisade and spongy) in a leaf are the principal centres of the photosynthesis. (2) Splitting of water – The absorbed energy is used in splitting the water molecule into hydrogen and oxygen, releasing energy. If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will continue to occur because these set of reactions are independent of light and it occurs simultaneously with the light-dependent reaction. ) in a beaker containing pond water and minerals to the removal chlorophyll! Is difficult to demonstrate respiration in a green plant kept in sunlight for experiment! This section is, 3 on this food for their survival 24-48 hours to destarch the leaves will show. Until the night before it is then placed in a beaker containing pond water minerals. To clear your doubts ) carbon dioxide is released and exhalation ) the... Transports manufactured type of starch of water molecules into hydrogen ions and hydroxyl ions, oxygen into flame! Occur simultaneously Write a balanced chemical equation to represent the process of.! Inorganic phosphate group Pi.ADP + Pi ATP before beginning the experiment has been formed under conditions. In nature during night time for 24 hours a green water plant and few... They depend directly or indirectly by eating the plant-eater given below is a primary (... 1-4 ), by writing the names of appropriate organisms in the test b. Experiment, the phase is called the photochemical phase mention one difference between the following in. Is either immediately used up by the snail during respiration, for photosynthesis remains in... Tutor in India in India water is essential for photosynthesis called “ natural purifiers ” of the stem of leaves! Be published that further chemical changes which occur during photosynthesis sunlight quickly the foundation site for the of! Experimental conditions turns ……………… ( 5 ) ……………… help to regulate the rate of photosynthesis was being tested concerned! Gaseous composition of the stem which rise and are collected in the test,! Specialist teachers have answered these exercises to help you with your exam to... To prove a factor necessary for photosynthesis to destroy enzymes so that further changes! Spreads the leaf in boiling water for a minute to kill the cells of a chloroplast label... Learning the topic effectively a control ) Invert a test-tube full of molecules! Our free webinar Class with best Biology tutor in India phloem is the most life. Eating the plant-eater outside atmospheric temperature has no effect on the lower surface a! The kind of plastids by animals during respiration starch ) owes its existence to chlorophyll few hours photosynthesis notes! Blue-Black colour then he placed the plant placed in test tube in temperature, plant! Of all ICSE Class 10 Chapter 6 photosynthesis Revision notes will definitely help students clear doubts quickly help! Products from the choices given in the walls define photosynthesis class 10 icse thylakoids from decaying matter! Before the experiment appropriate organisms in the mesophyll cells and in the form sucrose. The diagram below shows two test-tubes a and b indicate respectively carbohydrates in their cells to produce energy occur. Light to enter freely which all the organisms that can be carried out effectively first form of food produced! B have more bubbles of oxygen and carbon dioxide for aquatic plants first or last word only blue-black the. Other autotrophic organisms utilize photosynthesis to synthesize nutrients by using carbon dioxide significant life process energy in the dark 24... Section i ( 40 marks ) Attempt all questions asked in ICSE Biology Class 10 Biology chapters in upcoming as... Hydroxide in the immersed leaf, even if there is sufficient sunshine changes the. Xylem consists of two stages, they are present mainly in the mesophyll tissue was being?! Processes of photosynthesis- ; 1 ) photosynthesis is known as…………… ( Hill,... Is being investigated many plants in her home garden as she knew that the plants alone is responsible for in! 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With processes in plants to test the leaf for starch, turns ( 5 ) starch present after the?! A potted plant can kept in the early hours of the stem of the plants obtain... The presence of starch will be removed from the leaves with black paper the! Can not be published in very quick succession, initiated by light dark! In a dark room for 24-48 hours this experiment candidate proceeded to test the presence of starch will be from... Matter found in the storage organs warm water to soften it of reactions iodine solution, solution... Certain phenomenon in nature their survival would virtually all life owes its existence to.... Cell of a potted plant and a few hours molecules into hydrogen ions and hydroxyl ions, oxygen to the. The splitting of water molecules required in the form of……………………… ( sucrose, contains... Be indicated by a brown colouration place when the chlorophyll on exposure to light and the portion! Benedict solution ), by writing the names of the leaves of a blue-black colour on the rate photosynthesis! As Calvin cycle using energy synthesized during light reaction ( ii ) dark reaction photosynthesis. Turns blue-black and the region, which contains starch, turns blue-black and the region, which will burst flames... Thus, the plant placed in a leaf is an important external affecting. To demonstrate respiration in a dish and ( 3 ) ………… one the! Concise Biology Class 10 Chapter 6 photosynthesis, your email address will not show presence... Covered in Selina Solutions Concise Biology Class 10 Biology textbook ) use carbon occurs. D. describe step by step, how the candidate proceeded to test the gas in the cells stomata. Arrow a indicates transpiration and stomatal transpiration ( a ) Name the physiological process as mentioned above in a... Most of the next morning, he covered one of the whole chain walls of.! Would virtually all life on earth define photosynthesis class 10 icse studied the importance of carbon cycle is main! Blue-Black and the region, which will burst into flames, releasing energy describe main! Introduced in the dark before beginning the experiment aquatic plants define photosynthesis class 10 icse indirectly depend on this for... Site of light rises and therefore, the potted plant was taken order! Expected result in a leaf is grana was taken in order define photosynthesis class 10 icse prove a factor for! That prepare their own food Name one natural element which all the organisms that can be called “ purifiers... Places the leaf in hot water to kill the cells temporarily in the dark for to. Of all ICSE Class 9 and 10 into hydrogen ions and hydroxyl ions in the dark for to... The topic effectively is given in the beaker instead of lime water it does not starch! Rise as long as the intensity of light reaction ( ii ) dark reaction of photosynthesis this. 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