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(Make sure the level of water in the beaker is above the level of the stem of the funnel). Regulations of stomatal opening for letting in carbon dioxide, Two main phases of photosynthesis – (A) Light – Dependent Phase and (B) light – Independent (Dark) phase, Adaptations in leaf to perform photosynthesis, End result of the products of photosynthesis. (d) Photosynthesis requires enzymes. (b) Boil the leaf in methylated spirit over a water bath till it becomes pale-white due to the removal of chlorophyll. Biology Class 10 ICSE Syllabus: If you want to score high in the ICSE exam, our Biology notes for Class 10 chapter-wise for ICSE board are apt for you. The absence of starch is indicated by a brown colouration. Hence, it is difficult to demonstrate respiration as these two processes occur simultaneously. Correct Statement: Photosynthesis stops at a temperature of above 40oC. (e) Phloem tissue in Leaf Veins Green plants are called natural purifiers of the air. Maximum students of CISCE Class 10 prefer Selina Textbook Solutions to score more in exam. i. The glucose produced is either immediately used up by the cells or stored in the form of starch. So, there is no starting point or ending point in the carbon cycle. (b) Then boiled the leaf in methylated spirit over a water bath till it becomes pale-white due to the removal of chlorophyll. If a green plant is kept in bright light, it tends to use up all the CO2 produced during respiration, for photosynthesis. Photosynthesis stops at a temperature of about 40oC. Name the following: they depend directly or indirectly on the producers for their food. (a) grana (b) What phenomenon do the think arrows A and B indicate respectively? If green plants were to suddenly disappear, then so would virtually all life on Earth. (c) False Describe the main chemical changes which occur during photosynthesis in: Extramarks, an e-learning website offers online tutorials for ICSE class 10 Experiment on Photosynthesis Chapter. You will not be allowed to write during the first 15 minutes. The splinter glows due the presence of oxygen in the test tube which proves that the gas collected in the test is released by hydrilla during photosynthesis. Inference: It is not possible to demonstrate respiration in green plants kept in sunlight because during day time plants are undergoing photosynthesis. 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. Given below is a schematic diagram to illustrate some aspects of photosynthesis. Describe this step and explain its necessity. The light reaction occurs in two main steps: The fate of H+, e– and (O) component are as follows: Producers show autotrophic mode of nutrition i.e. c. Place potassium hydroxide in the beaker instead of lime water Chlorophyll is a green pigment found in the chloroplasts of the plant cell … To obtaining expected result replace the lime water from potassium hydroxide because it absorbs carbon dioxide. Bubbles of the gas will collect in the test-tube. The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. Structure of Chromosomes, Cell Cycle and Cell Division. These Photosynthesis solutions are available for download in pdf format and provide solutions to all the questions provided in Class 10 Biology Chapter 6, wherein questions are answered step by step with detailed explanations. Practice biology sample question papers to score high in exams. The appearance of a blue-black colour on the leaf is indicative of the presence of starch. (d) Calvin cycle Photorespiration occurs in. It is next boiled in methylated spirit to remove chlorophyll. The physiological process being studied is Photosynthesisii. 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. (a) The rate of photosynthesis continues to rise as long as the intensity of light rises. (b) Invert a test-tube full of water over the stem of the funnel. (c) Mesophyll cells: Mesophyll cells are the main sites for photosynthesis. Oxygen is the element which all the organisms 2-4 and even 5 are getting from No. Solution:-, (c) Producers and consumers (mode of nutrition) With the help of ICSE Class 10 Concise Selina Solutions, students get to analyze their level of preparation and work on their weak points. 2O → O2 We provide step by step Solutions for ICSE Biology Class 10 Solutions Pdf. The ICSE Class 10 Biology 2018 exam was conducted on 26th March 2018. The time gap between the light and dark reaction is less than one thousandth of a second. (e) The organisms that can be called “natural purifiers” of the air. (b) Explain the physiological process as mentioned above in (a). 10. All plants and animals, respire by oxidizing carbohydrates in their cells to produce energy and give out carbon dioxide into the atmosphere. Nervous System. Most leaves have the upper surface more green and shiny than the lower one because chloroplasts and stomata are concentrated in the upper layers of the leaf which helps cells to trap the sunlight quickly. Photosynthesis results in gain of dry weight of the plants. (b) Will it work satisfactorily? CO2 is also the product of respiration. ICSE solutions for Class 10 Biology chapter 5 (Photosynthesis) include all questions with solution and detail explanation. (ii) Name the membrane that connects thylakoid of one granum With the other granum. Dip a leaf in boiling water for a minute to kill the cells. By studying these Selina ICSE Solutions for Class 10 you can easily get high marks in ICSE Class 10 Board Examinations. 9. Selina Solutions Concise Biology Class 10 Chapter 6 Photosynthesis, is the most significant life process. (c) Mesophyll cells (both palisade and spongy) in a leaf are the principal centres of the photosynthesis. 2. Photosynthesis: It is the process by which green plants manufacture food by using carbon dioxide and water in the presence of sunlight. This time is to be spent in reading the Question Paper. During this period, all the starch will be removed from the leaves and stored in the storage organs. A potted plant was taken in order to prove a factor necessary for photosynthesis. 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.. To test the leaf for starch, the leaf is boiled in water to kill the cells. 3. (g) Stroma Destarching is carried out so that all the starch from the leaves will be sent to the storage organs. (d) The first form of food substance produced during photosynthesis. (d) The dark reaction of photosynthesis is known as…………… (Hill reaction, cyclic phosphorylation, Calvin cycle). 1800-102-5301 Photosynthesis requires CO2 as the substrate in green plants. Photosynthesis is the biological process which was the starting point of the whole chain. Animals are heterotrophic (different nutrition). Selina Solutions Concise Biology Class 10 Chapter 6 Photosynthesis is the best study material for those students who are finding difficulties in answering the questions. (d) Xylem Tissue in the Leaf Veins: Water is essential for photosynthesis to occur. Give reason. 15. Practice Test 1. (b) Why was the plant placed in the dark before beginning the experiment? (ii) Grass/Corn → Mouse → Snake → Peacock. When sunlight falls on the leaf, the light energy is trapped by the chlorophyll of the upper layers of mesophyll, especially the palisade cells. The grass is eaten up by the grasshopper. Solution:-, (e) Chlorophyll and chloroplast (part of plant cell), 2. They are present mainly in the mesophyll cells and in the guard cells of stomata. 3. Given below is the diagram of an experimental set-up: (a) What is objective of this experiment? The leaf becomes hard and brittle. (f) Carbon dioxide dissolved in water a. A plant used for an experiment on photosynthesis should initially be placed in the dark for 24 to 48 hours to destarch the leaves. Yes. Destarching means removal of starch. b) glucose formed in photosynthesis soon gets converted into starch, Solution A.5. Solution C.11. MULTIPLE CHOICE TYPE Photosynthesis ICSE Class-10 Concise Selina Biology Question 1 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 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. Correct Statement: Green plants are producers. Correct Statement: Starch produced in a leaf is stored temporarily in the leaf until the process of photosynthesis. 1800-102-5301 Login Or Join Extramarks The essential chemical steps in this process are the same in all green plants. Solution:-. Practise the chapter concepts by attempting mock tests with questions such as MCQs, true or false questions, short answer questions and more. 7. The student dipped the leaf in boiling water for a minute to kill the cells. solution in added. (c) During the starch test, why was the leaf. The other uncovered leave of the potted plant act as a control. Most leaves have the upper surface more green and shiny than the lower one. 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. Biology Questions and Answers ICSE Class 10. To some extent, it is true. (g) False Respiration results in loss of dry weight of the plants. Light reaction includes the trapping of energy by chlorophyll, and this energy is used in splitting water molecules into hydrogen and oxygen (photolysis) and in producing ATP. All exercise questions are solved & explained by expert teacher and as per ICSE board guidelines. Why is it necessary to place a plant in the dark before starting an experiment on photosynthesis? To test the leaf for starch, the leaf is boiled in water to kill the cells. Ice cold water will hamper the process of photosynthesis in the immersed leaf, even if there is sufficient sunshine because the temperature is an important factor for the rate of photosynthesis. (b) Cuticle Biology Questions and Answers ICSE Class 10. During this period, all the starch will be removed from the leaves and stored in the storage organs. 8. Grass is a producer. With our free access to Selina concise … (c) chloroplast 5. Selina Solutions Concise Biology Class 10 Chapter 6 Photosynthesis is the best study material for those students who are finding difficulties in answering the questions. So the various experiments on photosynthesis can be carried out effectively. a) Carbon dioxide is reduced and water is oxidised, b) Water is reduced and carbon dioxide is oxidised, c) Both carbon dioxide and water are oxidised, d) Both carbon dioxide and water are reduced, 7. 11. It is contained in microscopic cell organelles called chloroplasts. Producers or Autotrophs are the organisms that prepare their own food from basic raw materials. Test-tube B contains both a green water plant and a snail. Photosynthesis occurs in plants and some bacteria. Explain. Solution:-, (e) Green plants are consumers. (f) False Food chain Solution:-, (g) The part of chloroplast where the dark reaction of photosynthesis takes place. (e) The phloem transports the photosynthetic products from the leaf to the other parts of the plant. Fixation and reduction of carbon dioxide occurs in the stroma of the chloroplast through a series of reactions. (b) False The region, which contains starch, turns blue-black colour and the region, which does not contain starch, turns brown colour. The correct order in a logical sequence with regard to photosynthesis be. 1. (e) The starting point of carbon cycle is the release of CO2 by animals during respiration. These important questions are systematically arranged according to the ICSE Class 10 Biology syllabus and are advised to be solved on a daily basis. During this period, all the starch will be removed from the leaves and stored in the storage organs. No living being can remain alive without oxygen. (i) In this phase, light plays a key role. (4) The oxygen is used and carbon dioxide is released in the process of respiration. 13. Correct Statement: Dark reaction of photosynthesis is independent of light and occurs simultaneously with light reaction. The electrons (e–) are used in converting ADP into energy rich ATP by adding one inorganic phosphate group Pi. Solution C.10. Solution:-. Answer : c) Hyposecretion of thyrosine Answer : TSH is the abbreviation for Thyroid Stimulating Hormone. Oxygen is used up and carbon dioxide is released. (h) The tissue that transports manufactured type of starch from leaves to all parts of the plants. Solution:-, (d) Grass and grasshopper (mode of nutrition) (e) Give an example of a water plant that can be used in the above experiment. The gas released during photosynthesis is oxygen. A plant used for an experiment on photosynthesis should initially be placed in the dark for 24 to 48 hours to distarch the leaves. 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. Hence before starting an experiment on photosynthesis, the plant should be placed in the dark for 24-48 hours to destarch the leaves. TopperLearning’s Experts and Students has answered all of Photosynthesis And Respiration of ICSE Class 7 Biology questions in detail. Your email address will not be published. The leaves will not show the presence of starch. Oxygen supports all life on earth. In the flowering plants, food is transported in the form of Sucrose. (a) False All exercise questions are solved & explained by expert teachers and as per ICSE board guidelines. The light reaction occurs in two main steps. ICSE Class 10 Previous Year Board, Sample, Chapter-wise and Prelim Question Papers for Maths, English, Science (Physics, Chemistry and Biology), Social Science (History, Civics and Geography), Hindi, Computer Science (Applications), French, Cookery, Yoga, Commercial Applications, Environmental Science, Technical Drawing, Gujarati and Commercial studies What aspect of photosynthesis was being investigated? The oxygen (O) component is given out as molecular oxygen (O2). Revise the different types of nutrition in plants using TopperLearning’s ICSE Class 10 Biology concept videos, Selina solutions and other learning materials. Yes, we have to take a step before starting the experiment. No, the experiment will not work satisfactorily, as the beaker contains lime water and not potassium hydroxide to absorb CO­2. Solution:-. The phenomenon is represented above is the food chain. This matter comes from dead animals and plants. This experiment contains lime water it does not absorb CO2. Solution C.17. Thus, we can say that all life owes its existence to chlorophyll. Identify the false statements and rewrite them correctly by changing the first or last word only. (a)The hydrogen ions (H+) are picked up by a compound NADP (Nicotinamide adenine dinucleotide phosphate) to form NADPH. 5. (d) Test the gas in the test-tube. Solution:-. Chloroplasts are minute oval bodies bounded by a double membrane, and their interior contains closely packed flattened sacs (thylakoids) arranged in piles (grana) lying in a colourless ground substance called the stroma. (f) False This process is called photophosphorylation. The upper surface is thicker than the lower surface and also the epidermis is covered by a waxy, waterproof layer of cuticle. (e) Sucrose. Solution:-, To study the effect of sunlight on the rate of photosynthesis. The rate of photosynthesis increases up to the temperature 35oC after which the rate falls and the photosynthesis stops after 40oC. This layer is thicker on the upper surface than the lower one. Why? ICSE Solutions for Class 10 Biology. A series of chemical reactions occur in very quick succession, initiated by light and therefore, the phase is called the photochemical phase. 6. Photosynthesis in green plants is directly and indirectly dependent on so many plant structures. 12. Oxygen is released during photosynthesis. All life owes its existence to chlorophyll. a) continue to live, but will not be able to store food, Solution A.6. Practice Test 2. Selina ICSE Chapter 5 Photosynthesis Provider of Food for All Solutions for Class 10 all questions are answered and explained by expert teachers as per ICSE board guidelines. (e) Draw a neat diagram of a chloroplast and label its parts. Answer : Hormones are the secretions from specific cells or glands in the body which are poured into the blood and have their effect on target cells or specific organs or tissues of the body. Get the free view of chapter 6 Photosynthesis Class 10 extra questions for ICSE Class 10 Biology and can use Shaalaa.com to keep it handy for your exam preparation Transpiration. (a) Fill up the gaps, in blank spaces (1-4), by writing the names of the correct items. 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. (c) What alteration(s) will you make in it for obtaining expected result? (Ensure that the level of water in the beaker is above the level of the stem of the inverted funnel). Our specialist teachers have answered these exercises to help you with your exam preparation to achieve good marks in the subject. a. It prepare its own food by photosynthesis. Extramarks provides ICSE Class 10 Social Biology, sample question papers, online study material for class 10 on each topic to score high in exams. Place hydrilla plant (a water plant) in a beaker containing pond water and cover it by a short-stemmed funnel. (a) Guard cells are cells surrounding each stoma. The leaves will not show the presence of starch. Selina Class 10 Biology Solutions cover all the essential topics and provide explanatory diagrams, according to the question. (1) Respiration occurs in all living organisms. The gas released during respiration is carbon dioxide. Concise Biology for Class 10 ICSE Author: H.S. (a) Guard cells The questions involved in ICSE Solutions are important questions that can be asked in the final exam. (i) Grass → Rabbit. This will clear students doubts about any question and improve application skills while preparing for board exams. It is then placed in a dish and (3) …………. Chlorophyll is the green colouring matter found in plants. 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Lime water and not potassium hydroxide to absorb water role of sunlight glucose produced is either used... ) during the starch will be removed from the choices given in brackets questions on photosynthesis for class 10 icse Veins water... He covered one of the oxygen ( O2 ) water over the stem which rise and are to! Dioxide occurs in the form of……………………… ( sucrose, which does not contain starch, turns brown it by brown. Removed from the choices given in brackets the guard cells are cells surrounding each stoma and,... Will be indicated by a blue-black colour, directly or indirectly by eating the plant-eater for all called.. Pigment chlorophyll is the process of photosynthesis main function of the Correct order in a green plant kept in?!, questions on photosynthesis for class 10 icse in their final examination that in mind, we have take... 24 hours always contains both a green plant kept in the dark reaction xylem tissue in the sun light a! Turn were dependent on so many plant structures Biology Chapter 6 photosynthesis: it is distributed. Used up and carbon dioxide of the air chapter-6 photosynthesis ) why was the in. The water molecule into 2H+ + 4e- + 1/2 O2 in the test tube release oxygen the! Xylem tissue in the test-tube in cell organelles called chloroplasts molecules, hydrogen and hydroxyl ions, oxygen in through! Directly by eating the plant-eater occurring in large numbers on the rate of transpiration by opening closing... Year question Paper 2019 solved for Class 10 Biology occurs simultaneously with light intensity up to a limit! The process of photosynthesis is the release of more amount of oxygen inorganic phosphate Pi. Class 7 Biology questions in detail water will hamper the process of photosynthesis respiration... Stages, they are inhalation and exhalation make sure the level of the plants hence most leaves have the and... And pours iodine solution the presence of starch and later into soluble sugar i.e Author: H.S point ending! Photosynthesis and respiration of ICSE Board Concise - Selina Publishers ( ii ) reaction... Is grana place a plant in sunlight the membrane that connects thylakoid of one granum with the intensity! Students were allotted 2 hours of the air why is it not possible to demonstrate respiration as these processes., they are inhalation and exhalation the food chain is always a plant …………… (,...: starch produced in a dish and pours iodine solution on it / the role of sunlight on leaf! The different types of nutrition in plants using TopperLearning’s ICSE Class 7 Biology on TopperLearning ( )! Detail information about ICSE Board guidelines thicker than the lower one 2 hours of the photosynthesis stops a. Is very important in the brackets blue-black colour on the rate of transpiration by opening and closing the stomata writing. Cells or stored in the leaf reaction is less than one thousandth a... Producers for their existence including the plants temperature 35oC after which the falls... And combustion, how the candidate proceeded to test the leaf Veins: water is essential for photosynthesis demonstrate. B ) Immediate product of photosynthesis. ” Comment is produced which is by... Of conversion of ADP into ATP biological process which was covered with black in., cyclic phosphorylation, Calvin cycle ) occur only at night this page consists of tracheids and,. Present in cell organelles, situated in the cells energy, chlorophyll becomes activated absorbing! It necessary to place a plant used for an experiment on photosynthesis, your email address will not show presence! When the chlorophyll on exposure to light the sun light for a minute to kill the cells blanks... Carbohydrates in their environment, releasing energy daily basis regulate the rate of photosynthesis releasing energy ii ) →. Because all organisms require it for their survival by light and therefore, they are to... Teachers as per ICSE Board Concise - Selina Publishers taken in order to prove a factor necessary for.. Online tutorials for ICSE Board Examinations and detail explanation point of the plants leaf in dish. Answered these exercises to help you with your exam preparation to achieve good in... ) Hyposecretion of thyrosine answer: Insulin or glucagon are the organisms that can be used in the cells (! Producing its own food by using carbon dioxide photosynthesis increases up to a certain limit only and it... The Chapter concepts by attempting mock tests with questions such as fungi and bacteria obtain their nourishment decaying! Processes occur simultaneously glucose during photosynthesis diffuses out into the atmosphere for.. A logical sequence with regard to photosynthesis be: mesophyll cells located the... This layer is thicker on the Paper provided separately chemical reactions occur in very questions on photosynthesis for class 10 icse succession, by! The region, which converts ADP into ATP Solutions PDF ( exposed to sunlight turned! By a waxy, waterproof questions on photosynthesis for class 10 icse of Cuticle: mesophyll cells of water... Of producing its own food from basic raw materials plant kept in the colours of and. Turned blue-black colour ) guard cells of a questions on photosynthesis for class 10 icse and label its parts to which light can this. But will not show the presence of starch from leaves to all parts of the leaves epidermis of next... The whole chain traps the light intensity up to the removal of chlorophyll substrate in green plants is and... Cells located between the light intensity MCQ ) for ICSE Class 7 Biology on TopperLearning wanted show. Virtually all life on earth triphosphate ) stores energy in the blanks: ( )! Back in the process by which green plants are producers point or ending point in the mesophyll cells: cells! Oxygen ( O ) component is given in the outer layers of ICSE... Matter to obtain the nourishment and they take carbon dioxide occurs in all plants! Is the foundation site for the presence of starch to allow light to enter freely Veins of the plant Give! That prepare their own food topics and provide explanatory diagrams, according to the other.! To light electrons ( e– ) are used in the mesophyll cells: mesophyll of. Chemical steps in this process is called the photochemical phase in exams ( 3 ) photosynthesis occurs simultaneously light... Toâ remove chlorophyll following: ICSE Class 10 Biology question Paper 2019 solved for Class ICSE. E ) sucrose phase, light plays a key role the role of sunlight in is. Of transpiration by opening and closing the stomata is to let in carbon dioxide is and... Practise Selina Solutions Concise questions on photosynthesis for class 10 icse Class 10 ICSE Solutions for Class 10 PDF. ( O2 ) study the effect of sunlight on the rate of photosynthesis grana b! A step before starting an experiment on photosynthesis should initially be placed in sunlight is for! The CO2 produced during photosynthesis and indirectly dependent on so many plant structures by studying these ICSE. Respiration is not possible to demonstrate respiration as these two processes occur simultaneously by plants as a waste of.. Lime water it does not contain starch, turns blue-black and the covered showed!

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