NCERT/Class 10/Science/Life Processes

Life Processes

Class 10 · Science

150 questions50 easy50 medium50 hard

Sample Questions

Q1.What would happen if potassium hydroxide were placed alongside a plant in a sealed bell jar exposed to light?

  • AKOH would absorb all CO2, depriving the plant of CO2 for photosynthesis, so no starch would be formed in leaves
  • BKOH would absorb O2, causing the plant to die
  • CKOH would enhance photosynthesis by providing potassium
  • DKOH would have no effect on photosynthesis

Q2.What is the functional significance of rings of cartilage in the throat (trachea)?

  • AThey keep the air passage open and prevent it from collapsing during inhalation when pressure inside drops
  • BThey filter dust and bacteria from the incoming air
  • CThey produce mucus to moisturise incoming air
  • DThey regulate the rate of breathing

Q3.Critically evaluate why molecular movement is considered the most fundamental criterion for life.

  • AMolecular movements maintain ordered cellular structures against entropy, repair damage, and power all life processes — their absence means breakdown of life's organisation
  • BMolecular movement is just one of many equally important criteria for life
  • COnly macroscopic movement like growth distinguishes living from non-living
  • DMolecular movement is not necessary; chemical composition alone defines life

Q4.Why do plants have low energy needs compared to animals?

  • ABecause plants do not move and have many dead cells, reducing energy requirements
  • BBecause plants do not respire
  • CBecause plants get energy directly from the sun without needing to break it down
  • DBecause plants are smaller than animals

Q5.What are stomata?

  • ATiny pores on the surface of leaves for gaseous exchange
  • BGreen pigments in leaves
  • CRoot hairs for water absorption
  • DTube-like structures for water transport

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

ATPATP SynthesisATP YieldAbsorptionAcid ProductionActive TransportAerobic RespirationAirwayAlimentary CanalAlveoliAmino AcidsAmmoniaAmoebaAnaemiaAnaerobic FermentationAnaerobic RespirationAquatic RespirationArrhythmiaArteriesArteriolesAtriaAutotrophic NutritionAutotrophsBacteriaBileBile DuctBloodBlood ClottingBlood CompositionBlood FlowBlood PressureBlood VesselsBlood VolumeBreathingBreathing MechanismBreathing RateCAM MetabolismCO2CO2 ExchangeCO2 TransportCalvin CycleCapillariesCarbon CycleCardiac OutputCartilage RingsCatalystsCell BiologyCell SizeCellular EnergyCellular OrganisationCellular RespirationCelluloseChlorophyllChloroplastsCiliaCirculatory SystemCohesionCohesion-TensionCompanion CellsComparisonComparison with AnimalsComplete DigestionConcentration GradientControlled ExperimentCounter-current ExchangeCuscutaCytoplasmDead CellsDental CariesDeoxygenated BloodDesert PlantsDiabetesDiaphragmDiastolic PressureDiffusionDigestionDigestion ProductsDigestive SystemDissolved OxygenDivision of LabourDouble CirculationDouble PumpEcologyEmulsificationEndosymbiotic TheoryEndothermic ReactionsEndothermyEnergyEnergy CurrencyEnergy EfficiencyEnergy ReleaseEnergy StorageEnergy TransferEntropyEnzymesEvolutionEvolutionary AdaptationEvolutionary OptimisationExcretionExercise PhysiologyExperimental DesignExternal DigestionFat DigestionFat TransportFatty AcidsFermentationFiltrationFish GillsFish HeartFish RespirationFluid BalanceFood ChainFood ChainsFood TransportFood VacuoleFungiGas ExchangeGaseous ExchangeGastric JuiceGastric UlcersGillsGlomerular FiltrationGlucoseGlucose MetabolismGlucose ReabsorptionGlycogenGlycolysisGlycosuriaGuard CellsHaemoglobinHeartHeart ChambersHeart DesignHeart FunctionHeart RhythmHeart StructureHeterotrophic NutritionHeterotrophsHomeostasisHydrochloric AcidHypertensionInsulinIodine TestIon UptakeKidneyKidney EvolutionKidneysKrebs CycleLactic AcidLarge IntestineLeaf FallLeft VentricleLifeLife ProcessesLight SaturationLimiting FactorsLipaseLiverLiving vs Non-livingLung StructureLungsLymphMaintenance FunctionsMammal HeartMaterial ExchangeMetabolic WasteMetabolismMineral UptakeMitochondriaMolecular MovementMucusMulticellular OrganismsMuscle CrampsMusclesNephronNephron DesignNephronsNitratesNitrogenNitrogen CycleNitrogen ExcretionNitrogen FixationNutritionOesophagusOrgan SpecialisationOsmoregulationOsmosisOsmotic DiuresisOsmotic PressureOxygenOxygen DebtOxygen EfficiencyOxygen ExtractionOxygen TransportOxygenated BloodOxygenationPancreasPancreatic JuiceParamoeciumParasitic NutritionPassive TransportPepsinPeristalsisPhloemPhotosynthesisPhotosynthesis By-productPhotosynthesis RatePlant BiologyPlant Energy NeedsPlant ExcretionPlant MetabolismPlant NutritionPlant PhysiologyPlant TransportPlant Water TransportPlantsPlaquePlasmaPlateletsPotassium HydroxidePrimary ProducersProductsProtein DigestionProteinsPseudopodiaPulmonary CirculationReabsorptionResidual VolumeRespirationRespiratory PigmentRight VentricleRoot PressureRoot Water AbsorptionSalivaSalivary AmylaseSaprotrophic NutritionSelective ConservationSelective ReabsorptionSelf-digestionSieve TubesSingle vs Double CirculationSinoatrial NodeSmall IntestineSodiumSolar EnergySphincterSphygmomanometerStarchStomachStomataStructural SpecialisationSunlightSurface AreaSurface Area to Volume RatioSystemic CirculationSystemic vs Pulmonary CirculationSystolic PressureTerrestrial AdaptationThermodynamicsThermoregulationTooth EnamelTracheaTranslocationTranspirationTranspiration PullTransportTransport DirectionTransport SystemsTrophic LevelsTubular ReabsorptionUltrafiltrationUnidirectional vs BidirectionalUreaUrineUrine FormationValvesVeinsVentriclesVertebrate EvolutionVilliVirusesWarm-bloodedWarm-blooded AnimalsWater AbsorptionWater ConservationWater PotentialWater TransportXylemXylem TransportYeast

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