MCQ Chapter 12 Biology Class 11 Maharashtra Board Study of Animal Type : Cockroach 1. Why is energy essential in different life processes?It supports growth onlyIt drives metabolic activitiesIt prevents cell divisionIt inhibits enzyme functionQuestion 1 of 202. How do we primarily get energy for life processes?Through respirationBy absorbing sunlight directlyFrom water moleculesVia mineral absorptionQuestion 2 of 203. Why is all life on earth considered 'bottled solar energy'?Because life depends on fossil fuelsBecause photosynthesis traps solar energy in foodBecause sunlight directly powers cellsBecause oxygen is produced by the sunQuestion 3 of 204. What is the primary function of chlorophyll pigments in photosynthesis?To store carbohydratesTo trap solar energyTo release carbon dioxideTo absorb waterQuestion 4 of 205. What is the chemical equation for photosynthesis?6CO₂ + 12H₂O → C₆H₁₂O₆ + 6O₂ + 6H₂O6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂12CO₂ + 6H₂O → C₆H₁₂O₆ + 12O₂6CO₂ + 12H₂O → C₆H₁₂O₆ + 12O₂Question 5 of 206. Where are chloroplasts mainly located in a plant?In the epidermisIn the mesophyll cells of leavesIn the vascular bundlesIn the stomataQuestion 6 of 207. What is the shape of chloroplasts in higher plants?SphericalDiscoid or lens-shapedCylindricalIrregularQuestion 7 of 208. What is the ground substance inside a chloroplast called?GranaThylakoidStromaLamellaQuestion 8 of 209. What are the chlorophyll-bearing sacs in chloroplasts called?StromaGranaThylakoidsPlastoglobulesQuestion 9 of 2010. What is the main difference between chlorophyll a and chlorophyll b?Chlorophyll a has a methyl group, chlorophyll b has an aldehyde groupChlorophyll a has an aldehyde group, chlorophyll b has a methyl groupChlorophyll a is fat-soluble, chlorophyll b is water-solubleChlorophyll a absorbs red light, chlorophyll b absorbs blue lightQuestion 10 of 2011. What is the role of carotenoids in photosynthesis?They synthesize ATPThey absorb light and transfer energy to chlorophyllThey fix carbon dioxideThey release oxygenQuestion 11 of 2012. Why does chlorophyll appear red in reflected light in certain conditions?Due to absorption of red wavelengthsDue to fluorescence when excited by lightDue to the presence of carotenoidsDue to scattering of green lightQuestion 12 of 2013. What pigment is responsible for the red color of tomatoes and chillies?ChlorophyllCaroteneXanthophyllAnthocyaninQuestion 13 of 2014. What is the range of wavelengths for visible light in the electromagnetic spectrum?200–300 nm390–730 nm800–1000 nm100–200 nmQuestion 14 of 2015. What is an absorption spectrum?A graph showing the rate of photosynthesisA graph showing light absorption by pigments at different wavelengthsA graph showing oxygen releaseA graph showing ATP productionQuestion 15 of 2016. Which wavelengths are most absorbed by chlorophyll a and b?Green and yellowBlue, violet, and redUltraviolet and infraredOrange and greenQuestion 16 of 2017. What is an action spectrum?A graph showing light absorption by pigmentsA graph showing the rate of photosynthesis at different wavelengthsA graph showing ATP synthesisA graph showing oxygen evolutionQuestion 17 of 2018. What did Van Niel’s experiment with bacteria demonstrate?Oxygen comes from carbon dioxideWater is used instead of H₂S in green plantsChlorophyll is not needed for photosynthesisATP is not produced in photosynthesisQuestion 18 of 2019. What did Ruben confirm using isotopic oxygen (¹⁸O)?Oxygen in photosynthesis comes from CO₂Oxygen in photosynthesis comes from waterCarbon dioxide is not used in photosynthesisWater is not split during photosynthesisQuestion 19 of 2020. What is the Hill reaction?Synthesis of glucose in the darkPhotolysis of water releasing oxygenFormation of NADPH in the darkReduction of CO₂ to glucoseQuestion 20 of 20 Loading...
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