MCQ Chapter 10 Class 7 Science Curiosity NCERT Advertisement Life Processes in Plants 1. What is the primary source of energy for plant growth?SoilSunlightWaterAirQuestion 1 of 202. Which part of the plant is primarily responsible for photosynthesis?RootsStemLeavesFlowersQuestion 2 of 203. What pigment in leaves helps capture sunlight for photosynthesis?StarchChlorophyllGlucoseIodineQuestion 3 of 204. What gas is essential for plants to prepare starch during photosynthesis?OxygenNitrogenCarbon dioxideHydrogenQuestion 4 of 205. What is the process by which plants prepare food using sunlight?RespirationPhotosynthesisTranspirationAbsorptionQuestion 5 of 206. What is the role of stomata in plants?Transport waterStore foodExchange gasesAbsorb sunlightQuestion 6 of 207. Which structure in plants transports water and minerals from roots to other parts?PhloemXylemStomataChlorophyllQuestion 7 of 208. What is the primary product of photosynthesis?StarchGlucoseOxygenWaterQuestion 8 of 209. What gas is released during photosynthesis?Carbon dioxideNitrogenOxygenHydrogenQuestion 9 of 2010. Which part of the plant transports food from leaves to other parts?XylemStomataPhloemRootsQuestion 10 of 2011. What indicates the presence of starch in a leaf during the iodine test?Red colorBlue-black colorYellow colorGreen colorQuestion 11 of 2012. Why is a leaf decolorized before the iodine test?To remove starchTo make it softTo observe color change easilyTo add chlorophyllQuestion 12 of 2013. What happens to a plant kept in the dark with water but no sunlight?It grows normallyIt produces starchIt shows minimal growthIt dies immediatelyQuestion 13 of 2014. What is the role of water in plant growth?Provides energyAbsorbs sunlightUsed in photosynthesisStores foodQuestion 14 of 2015. What does the experiment with caustic soda in a bottle demonstrate?Role of waterRole of carbon dioxideRole of sunlightRole of chlorophyllQuestion 15 of 2016. What is the word equation for photosynthesis?Glucose + Oxygen → Carbon dioxide + WaterCarbon dioxide + Water → Glucose + OxygenGlucose + Water → Carbon dioxide + OxygenCarbon dioxide + Oxygen → Glucose + WaterQuestion 16 of 2017. What is the purpose of keeping a plant in the dark for 36 hours before an experiment?To increase chlorophyllTo destarch the plantTo enhance growthTo produce glucoseQuestion 17 of 2018. Which scientist studied the effects of water and temperature on photosynthesis?Kamala SohonieRustom Hormusji DasturBhaskarBarkhaQuestion 18 of 2019. What does the presence of air bubbles in an inverted test tube during photosynthesis indicate?Release of carbon dioxideRelease of oxygenAbsorption of waterProduction of glucoseQuestion 19 of 2020. Why do some leaves appear red or violet?Lack of chlorophyllPresence of other pigmentsAbsence of starchExcess waterQuestion 20 of 20 Loading...
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