Biology Mcqs 05
What is the main function of the small intestine? Absorption of nutrientsAbsorption of water Production of bileDigestion of fat onlyA) Absorption of nutrients The small intestine absorbs nutrients from digested food.
Which pigment is responsible for the dark color of human skin?ChlorophyllMelaninHemoglobinCaroteneB) Melanin: Melanin determines the color of skin and protects against UV rays.
What is the main component of plant cell walls?Glucose Starch CelluloseGlycogen: C) Cellulose Plant cell walls are made of cellulose, a strong carbohydrate.
Which process converts sugar into energy in cells? PhotosynthesisRespiration FermentationTranspirationB) RespirationCellular respiration breaks down sugar to release energy.
Which part of the brain is responsible for intelligence and memory?CerebrumMedullaCerebellumPonsA) Cerebrum The cerebrum handles thinking, learning, and memory.
What is the function of phloem in plants? Transport waterTransport mineralsTransport foodProvide strength C) Transport food Phloem carries food from leaves to other parts of the plant.
Which organ is affected by hepatitis? KidneyLiver Lungs HeartB) LiverHepatitis is an inflammation of the liver.
Which disease is caused by a deficiency of iodine?ScurvyGoiter RicketsAnemiaB) GoiterGoiter is an enlargement of the thyroid due to iodine deficiency.
What is the main function of mitochondria? Make proteinsControl the cellRelease energy Store wasteC) Release energyMitochondria generate energy through respiration.
Which organism can make its own food? HumansDogMango treeLionC) Mango treePlants like the mango tree make their own food by photosynthesis
Which part of the human body contains alveoli?HeartLiverLungsBrainC) Lungs Alveoli are tiny sacs in the lungs where gas exchange happens.
What is the mode of nutrition in fungi?AutotrophicParasitic SaprotrophicPhotosynthetic C) SaprotrophicFungi feed by breaking down dead material (saprotrophic).
What is the color of oxygen gas?ColorlessGreen Blue Red A) Colorless Oxygen is a colorless, tasteless, and odorless gas.
What is the shape of red blood cells?Spherical CubicalBiconcaveCylindricalC) Biconcave: RBCs have a biconcave shape to increase oxygen-carrying efficiency.
What is the process of losing water from plant leaves called?RespirationTranspirationEvaporationPhotosynthesis B) TranspirationTranspiration is the loss of water vapor from leaves