MCQ Chapter 15 Biology Class 11 महाराष्ट्र Board Excretion and Osmoregulation 1. What is the primary purpose of excretion in the body?To digest foodTo eliminate metabolic waste productsTo absorb nutrientsTo regulate body temperatureQuestion 1 of 202. Which of the following is a gaseous waste product excreted by the body?UreaCarbon dioxideUric acidCreatinineQuestion 2 of 203. Which pigment is excreted through faeces due to the breakdown of haemoglobin?UrochromeBilirubinCreatinineAmmoniaQuestion 3 of 204. Why does urine appear deeply coloured?Due to high water contentDue to the presence of urochromeDue to low salt concentrationDue to the absence of ureaQuestion 4 of 205. What causes bad breath after consuming garlic or onion?Presence of sugar in the foodVolatile substances excreted through the lungsHigh protein contentExcess water retentionQuestion 5 of 206. Why are excess amino acids broken down in the body?To store energyBecause the body cannot store themTo produce carbohydratesTo form fatsQuestion 6 of 207. What is the process of separating the amino group from an amino acid called?UreotelismDeaminationAmmonotelismFiltrationQuestion 7 of 208. Which type of nitrogenous waste is the most toxic?UreaUric acidAmmoniaCreatinineQuestion 8 of 209. Which animals are typically ammonotelic?Terrestrial mammalsAquatic invertebrates and bony fishesBirds and reptilesDesert amphibiansQuestion 9 of 2010. How much water is required to eliminate 1 gram of ammonia?50 ml100 ml300–500 ml5–10 mlQuestion 10 of 2011. Which excretory product requires the least amount of water for elimination?AmmoniaUreaUric acidCreatinineQuestion 11 of 2012. Which animals are typically ureotelic?Birds and insectsMammals and cartilaginous fishesAquatic invertebratesSponges and protozoaQuestion 12 of 2013. What is the name of the cycle that converts ammonia to urea in the liver?Inosinic acid pathwayOrnithine/urea cycleCountercurrent mechanismRAAS cycleQuestion 13 of 2014. Why do sharks retain more urea in their blood?To increase toxicityTo make blood isotonic to marine waterTo reduce blood pressureTo store energyQuestion 14 of 2015. Which animals excrete guanine as a nitrogenous waste?MammalsSpiders and scorpionsBony fishesAmphibiansQuestion 15 of 2016. What is the primary source of creatinine in the body?Breakdown of carbohydratesCatabolism of creatinine phosphateMetabolism of fatsDigestion of proteinsQuestion 16 of 2017. Why is creatinine used as an index of kidney function?It is stored in the kidneysIts blood levels remain steady when kidneys function normallyIt is not excreted in urineIt is produced by the lungsQuestion 17 of 2018. Why do we produce less urine during summer?Due to increased water intakeDue to high water loss through sweatingDue to low blood pressureDue to reduced food consumptionQuestion 18 of 2019. What type of organisms are marine birds like albatrosses in terms of osmoregulation?OsmoregulatorsOsmoconformersStenohalineEuryhalineQuestion 19 of 2020. Which organisms can tolerate a wide range of salt concentrations?StenohalineEuryhalineOsmoconformersOsmoregulatorsQuestion 20 of 20 Loading...
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