Take a healthy potted plant and keep it in a dark room for 48 hours so that all the starch gets used up. (b) The covered part of leaf will not have starch and will not show colour change. (First compound is unstable, 6C keto acid) Answer : The difference is given below. (c) III only PHOTOSYNTHESIS. Can this experiment be performed with a de-starched leaf detached from the plant? Now dip the leaves in iodine solution for a few minutes. During this stage, light energy is converted into chemical energy. Procedure I. (b) True (c) False The process begins in the daylight, by gathering the light. Light dependent phase. Light-dependent phase is also known as the Hill reaction or photochemical reaction. Respiration is the biochemical process during which organic food, mainly glucose that is present in the cell, breaks down into simpler substances and liberates carbon dioxide and energy. For the experiment that, “light is necessary for photosynthesis” the potted plant is first kept in darkness for a day. In an experiment to show that sunlight is necessary for photosynthesis, the leaf is boiled in alcohol for a few minutes using a water bath. (b) Both the surfaces of the leaf were white. (d) It is the right procedure for the experiment. Revise important photosynthesis-based questions by watching our interactive exam decoded videos by Biology experts. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds. Photosynthesis (Greek word photos: light; synthesis-, putting together) is the process by which the green plants synthesise their own food (glucose) using carbon dioxide and water as raw materials in presence of sunlight and chlorophyll. Class 10 Biology (India) ... Now they have the energy to take in carbon dioxide and water and then carry out the photosynthesis reaction which we'll look at in detail in a little while. Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. Now immerse the leaves in a beaker containing alcohol. A student performed the starch test on a leaf, some steps involved are shown below: Question 8: Question 7 : Differentiate between the following pair on the basis of what is mentioned in the bracket. In a plant if there are no leaves for a short period of time, i.e.,-Autumn, how do such plants survive? Calvin cycle is called as C 3 - cycle. Candidates who are ambitious to qualify the Class 10 with good score can check this article for Notes. Respiration Experiment Class 10 Introduction. (False, It remains stored in it for 24 to 48 hours) Yes, plants can prepare their food in any light i.e.-tube light, bulb-light, sunlight. Iodine solution becomes blue-black in presence of starch. Low CO 2 compensation point (0-10 m l. CO 2 l-1). When iodine solution is added on the leaves. (d) Boil the destarched leaf in a mixture of alcohol and water. Question 21 : Account for the given below briefly. ... 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. It is essential because: Photosynthesis is the process in plants and certain other organisms that uses the energy from the sun to convert carbon dioxide and water into glucose (a sugar) and oxygen. To take bigger steps in life, you also need to rely on a good academic record. Answer : Location : Thylakoids are found in chloroplast. Which range of wavelength (in nm) is called photosynthetically active radiation (PAR)? Selina ICSE Solutions for Class 10 Biology Chapter 6 Photosynthesis: Provider of Food for All. By the end of this lecture you will be able to: 1. Are you one of those who finds science fascinating? Photolysis Photophosphorylation It is a process of splitting of water molecule into 2H+ + 4e- + 1/2 O2 in the … Question 2 : State the exact location of the chloroplast. Photosynthesis is an endothermic. (a) alcohol is highly volatile The result was: NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations includes all the important topics with detailed explanation that aims to help students to understand the concepts better. (i) Rate or yield of photosynthesis is measured in terms of quantum yield or O 2 evolution, which may be defined as, "Number of O 2 molecules evolved per quantum of light absorbed in photosynthesis." (a) deactivate the chloroplast In which part of the plant the photolysis reaction initiates? (b) glucose formed in photosynthesis soon gets converted into starch. (a) water 10. Students who are preparing for their Class 10 exams must go through NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations. (d) the leaf covered with any of the above strips. Question 3: Cytoplasmic organelle that help in the manufacture of starch. Photosynthesis Summary . Photosynthesis occurs in two steps: Light reaction and Dark Reaction. Why do we warm the leaves in alcohol? Important Questions on Chemical Reactions and Equations and previous years questions are also available to use free. Question 4: Alcohol is highly inflammable, be careful while boiling leaf in alcohol using water bath. (Dark Reaction by Calvin Cycle) Q4: Mention the conditions for photosynthesis. (d) Leaf should be in alcohol and this container should be heated in water. (d) prepare leaves for photosynthesis. Question 1. (c) the blue light has maximum wavelength These contain chloroplasts, which are tiny objects containing chlorophyll. Developed by Amrita University Under research grant from Department Of Electronics & Information Technology (d) water is necessary for photosynthesis. And then it spits out this juicy carbohydrate molecules. Answer : Chloroplast is the cytoplasmic organelle that help in the manufacture of glucose and starch. 1 Mark Questions Answer : Photophosphorylation is the process of conversion of ADP into ATP during photosynthesis. (b) Alcohol helps in dissolving the chlorophyll without affecting the other cells. Biology is the study of life. (c) intake of C02 at night The photosynthesis process takes place at two levels or steps. Biology Questions and Answers ICSE Class 10 : Cell Cycle and Cell Division | Genetics | Absorption by Roots| Transpiration | Photosynthesis | Circulatory System | Excretory System | Nervous System | Endocrine System | Reproductive System | Population and Its Control | AIDS to Health and Health Organisation | Pollution, Photosynthesis Questions and Answers ICSE Class 10, CBSE Class 10 Science Questions and Answers, Biology Questions and Answers ICSE Class 10. (b) (i), (ii), (iii), (iv) Glucose is further converted into starch. Question 11: Answer : The given statement is false. Аnswer: Saturday, July 15, 2017. The correct statement is respiration occurs in all the cells of the plant. Question 15: (definition). Dec 26, 2020 - CBSE Class 10 - Science - CH6 Life Processes (Photosynthesis) Photosynthesis Class 10 Notes | EduRev is made by best teachers of Class 10. At the end of the experiment, which one of the leaf parts labelled I, II and III will become blue-black when dipped in iodine solution? (a) I, III, IV, II When partially covered leaf is treated with iodine solution then the covered portion do not turn blue-black on adding iodine solution whereas the uncovered portion which received the light turns blue-black due to synthesis of starch in them. What Are the Products of Photosynthesis? This step is carried out to Advertisement Remove all ads. Class-10CBSE Board - Photosynthesis - LearnNext offers animated video lessons with neatly explained examples, Study Material, FREE NCERT Solutions, Exercises and Tests. It is a process of splitting of water molecule into 2H+ + 4e- + 1/2 O2 in the presence of sunlight by activated photosynthetic pigments. Call our LearnNext Expert on … 1 Mark Questions Answer : Photophosphorylation is the process of conversion of ADP into ATP during photosynthesis. At the time of solving the NCERT questions, if you find yourself puzzled or unaware of … Question 18: Question 20: We, at Vedantu, have analyzed th… The general balanced reaction for Photosynthesis Formula according to Kamen and Ruban (1941) is … Question 12: A. The best result of the experiment that light is necessary for photosynthesis would be yielded by using leaves from a plant kept for over twenty four hours: Аnswer: (b) I, IV, III, II Understand the concept clearly by consistently practicing the Multiple Choice Questions and score well in your exams. Light-dependent reactions (light reactions) 2. Test , Class 10, Chemistry, CBSE- Chemical Reactions and Equations. Carbon dioxide and water don't spontaneously convert into glucose and oxygen . (c) Boil the destarched leaf in water only. The correct order is: Photosynthesis takes place in leaf cells. (a) the leaves absorb maximum blue light Why do we boil the leaves in alcohol solution? Dark Reactions: These reactions do not need sunlight and occur in its absence. Question 1: Asked by avinashdesaiad10 21st May 2019 2:15 PM Oxygen is the by-product released during photosynthesis. Аnswer: Answer : Grana is the site of light reaction in the cells of a green leaf of a plant. Class 10 Science Chemical Reactions and Equations – Get here the Notes for Class 10 Science Chemical Reactions and Equations. The process of conversion of ADP to ATP during the first phase of photosynthesis. 2. Alcohol is not heated directly over the flame because it will evaporate quickly without being much in contact with the leaves. What photosynthesis accomplishes, why it's important, and how the light-dependent and light-independent reactions work together. On adding iodine solution to covered leaf no colour change was observed. Аnswer: (b) the leaves covered with green and black strips (b) II only Answer : b) Nictotinamide Adenine Dinucleotide Phosphate. Overall reaction of photosynthesis Light Energy 6CO 2 + 12H 2 O Chlorophyll → C 6 H 12 O 6 + 6O 2 + 6H 2 O Photosynthesis involves two types of reactions namely, light reactions and dark reactions. (a) extract starch When you cover a portion of leaf with dark paper the results are not clearly visible. Plants absorb water through their roots, and carbon dioxide through their leaves. It will catch fire if we heat the beaker containing alcohol directly on the flames of burner. (b) blue light The correct sequence of steps should be: Class 10 Chapter 1 Chemical Reactions and Equations describe the various processes that happen around us in the World like Rusting of Iron, Decomposition, etc. III. The result will be as shown in diagram: Class-10CBSE Board - Photosynthesis - LearnNext offers animated video lessons with neatly explained examples, Study Material, FREE NCERT Solutions, Exercises and Tests. done clear. b) glucose formed in photosynthesis soon gets converted into starch. Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. Photosynthetically less efficient and productivity low. Give reasons. Question 3: Give reason. The starch test is done on the leaf after 8 hours of exposure to light. Unlike many other endothermic reactions, photosynthesis does not absorb energy as heat. iii) Large surface area of leaves for absorbing maximum light. Answer : The function of thylakoid is to trap the light energy and to transform this energy into chemical energy forms, i.e. Answer : Light reaction of photosynthesis takes place in the grana/thylakoids of the chloroplast. Photosynthesis. Question 23 : The dark reaction of photosynthesis is light independent. The site of light reaction in the cells of a leaf is …………. Which one of the following is true about the reaction taking place in photosynthesis process? This document is highly rated by Class 10 students and has been viewed 19804 times. Chemical Equation Of Photosynthesis Class 10 Dark Reactions: These reactions do not need sunlight and occur in its absence. keep the potted plant in darkness for about 48 hours This phase occurs in the thylakoids … (b) light is necessary for photosynthesis 2. Answer : Chloroplasts are mainly found in the mesophyll cells located between the upper and lower epidermis of the leaves. The removal of all the starch present in plant is called de-starching. Plants prepare their food by the process called photosynthesis. LIGHT REACTION (PHOTOCHEMICAL PHASE) Light reactions include light absorption, water splitting, oxygen release and formation of ATP & NADPH (high-energy chemical intermediates). It is a process of formation of ATP from ADP and inorganic phosphate by the utilisation of energy released by electrons emitted during photolysis of water. Light reaction and dark reaction. ATP and NADPH to be used in dark reaction. Question 6: There are many instances when bright students miss golden opportunities because of lack of proper guidance and are not able to perform optimally despite deep interest and willingness to work hard. Available for CBSE, ICSE and State Board syllabus. Question 17 : Mention any three adaptations found in plants to favour the process of photosynthesis. CBSE Class 10 Science Practical Skills – Light is Necessary for Photosynthesis. … Will you get the same result if you perform the experiment without de-starching the plant? Starch test: On adding iodine solution to the starch, it forms starch-iodine complex which is blue-black in colour. Question 5: (b) B (c) steam from water bath dissolves the chlorophyll Is starch it happens in the presence of ‘ ^ ’ materials required by plants photosynthesis! Where the light reactions are light dependent reactions catch fire between the and! 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