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Photosynthesis Grade X Level:1 I. Name the following: 1) The source of carbon dioxide for aquatic plants 2) The compound that stores energy in the cells 3) The Natural purifiers of the air 4) The category of organisms that prepare their own food from basic raw materials 5) The site of photophosphorylation 6) Damage of photosynthetic pigments at very high intensity of light 7) The Point at which the rate of respiration and photosynthesis are equal. 8) The apparatus used to prove that light is necessary for photosynthesis 9) The site of light reaction 10) The first chemical compound formed in photosynthesis 11) The ground substance found in chloroplast 12) The site of Dark reaction 13) The majorelement ( mineral) found in chlorophyll 14) The semi autonomous organelles 15) The gas released as a by-product of photosynthesis 16) The primary pigment 17) The light in which photosynthesis is very minimum 18) The site of photolysis of water 19) The site of Photochemical phase 20) The site of Biosynthetic phase 21) The stable product formed during photosynthesis 22) A solvent for chlorophyll 23) The chemical reaction in which oxygen is given out 24) The carbon di oxide acceptor in Dark reaction 25) The basic unit of light II.Fill up the blanks: 1) Chlorophyll has ___________ ( mineral) in the middle of ring. 2) The photosynthetic unit of plants is _________. 3) A chemical which absorbs carbondioxide is _____________. 4) Xanthophyll is __________ coloured pigment 5) Photosynthesis stops at a temperature above ___________. 6) The source of oxygen relased in photosynthesis is ______________. 7) Reducing power in photosynthesis is ____________. 8) In photosynthesis _____________ oxidized and ___________ is reduced. 9) The chemical used to test starch is _________. III.Define the following: 1) Photosynthesis 2) Quantosome 3) Solarisation 4) Photolysis of water 5) Phosphorylation 6) Photophosphorylation 7) Grana 8) Etiolation 9) Destarching 10) Compensation point 11) Carbon cycle 12) Thylakoids 13) Translocation 14) Polymerisation 15) Varigated leaves IV) Expand the following: 1) RUBP 2) PGA 3) ATP 4) ADP 5) NADP 6) NADPH 7) RUBISCO 8) DNA V) Mention whether the following statements are true or false. If false, rewrite the statements by changing the bold letters alone: 1) All green plants are categorized as consumers. 2) The immediate product of photosynthesis is glucose. 3) The dark reaction takes place in stroma. 4) Plants pay the price of photosynthesis in the form of respiration. 5) The oxygen produced during photosynthesis comes from carbondioxide 6) Photosynthesis occurs in all the cells of the plants. 7) Light reaction is called thermo-chemical reaction. 8) Photosynthesis results in loss of dry weight of the plants. 9) Photosynthesis stops at a temperature of about 35o C. 10) Photolysis of water takes place in stroma. Level:2 1) Given below is a schematic diagram to illustrate some aspects of photosynthesis: i) Fill up the gaps in the blank spaces ( 1 to 8) by writing the names of the correct items. ii) Write the balanced equation of photosynthesis. iii) What is polymerization? iv) Name the chemical found plants which get part 2. v) Write any 4 any adaptation for photosynthesis vii) Define carbon cycle. 2) Given below is an experimental set up to test a leaf for starch: i) Write the steps involved in the test in a flow chart. ii) Explain the purpose of each step in the experiment. iii) What is destarching of leaf? iv) Is it necessary to do destarching the leaf before starting the test? Why? v) Name the chemical used in the test at the end of the experiment to get the result. vi) What kind of result can be obtained after adding the chemical? 3)The diagram given below is an organelle present in plant cell. Study the same and answer the questions that follow: [ 5 marks] i) Identify the organelle. ii) Label the parts 1 to 4. iii) Represent the physiological process taken place in this organelle in the form of a chemical equation. iv) Name the phases of process occuring in the parts labeled 3 and 4 . v) A chemical substance NADP plays an active role in one of the phases. Give the expanded form of NADP. 4) A healthy croton plant bearing variegated leaves was kept in a dark cupboard after which it was placed in sunlight for a few hours. One of the leaves then plucked an outline of the leaf marking the green and nongreen regions was drawn. The leaf was then tested for starch. Using the above information, answer the following questions. i) State the aim of the above experiment. ii) Name the chemical used for testing the presence of starch. iii) Why is the boiled in water and alcohol testing for the presence of starch? iv) What change is seen on the leaf after the stach test? v) Why is the plant kept in dark room initially? vi) What is carbon cycle? vii) What are variegated leaves? 6) The experiment with leaf shows that photosynthesis requires the presence of one factor. i) What is the aim of the experiment? ii) What precaution should be taken before conducting the test? Why? iii) What will happen if the precaution is not taken? iii) Why is the leaf covered with a strip of black of paper? iv) Write the steps involved in the starch test in a flow chart. v) What kind of result can be obtained at the end of the experiment? _______________________________________________________________________ 7) The figure given below represents an experiment performed to demonstrate a particular aspect of photosynthesis. The apparatus was kept in sunlight for almost the whole day. i) What is the aim of experiment? ii) What is the special condition inside the bell jar? iii) why is the pot is covered with polythene bag? iv) What is the purpose of using Conc NaoH? v) Name the process which is reverse of photosynthesis in terms of end products. vi) Write any two precautions to be taken to conduct this experiment. vii) Suggest a suitable control for this experiment. ___________________________________________________________________________ 8) An apparatus as shown below was setup to study a physiological process which occurs in green plants: . i) Name the process. ii) Name the gas evolved in this process. How will you test the gas evolved? iii) What is the source of this gas? iv) When a chemical is added to the water in the beaker, the process gets accelerated. Name the chemical. v) Write the balanced equation of the process mentioned. vi) State Black man s Law. ______________________________________________________________________________ 9) Give one function for the following structures: i) Chlorophyll ii) Grana iii) Stromaiv) Stomata v) Chloroplast 10) The diagram given below shows how carbon compounds are recycled: a) Define carbon cycle b) Name the processes A E c) Increase in Carbondioxide level in the atmosphere cause undesirable effect on the earth. Name the effect. d) Write any 4 methods to mitigate the effect. e) Write the overall equations for photosynthesis. 11) Give scientific reason for the following facts: a) Green leaves are thin and broad. b) Oxygen produced during photosynthesis comes from water. c) Oxygen is a waste product of photosynthesis. d) Most leaves have a more green and shiny upper surface than the lower surface. e) Chloroplast and Mitochondria are called semi-autonomous organs. 12) Differentiate between the following on the basis of hints given in the brackets: a) Photosynthesis and Respiration (Raw material and end products) b) PSI and PSII ( pigments and spectrum) c) Redlight and Green light ( rate of photosynthesis) d) Dorsiventral and isobilateral leaves e) Light and Dark Reaction ( Site of occurrence and end products) f) Chlorophyll and chloroplast ( location and function) ______________________________________________________________________________ Level: 3 1. Explain why chlorophyll appears green to us in terms of what happens to different wavelengths of light that strike a chlorophyll molecule. 2. How does the amount of energy in light change as the wavelength increases? 3. Which colors of light are most effective for photosynthesis? Explain why. 4. How can cells store the sugar that is produced in photosynthesis? 5. Label the diagram below to summarize the two stages of photosynthesis. Use the word bank below the diagram to fill in the blanks. Word list: + thylakoids Calvin cycle CO2 NADP granum light NADPH O2 stroma H2O ATP ADP + P light reactions sugar
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