Biology Mcqs 04
Which vitamin is also called ascorbic acid?Vitamin A Vitamin BVitamin C Vitamin D: C) Vitamin C Ascorbic acid is another name for Vitamin C.
Which organ helps in breathing? LiverKidneysLungs HeartC) LungsLungs are responsible for exchanging gases during breathing.
Which part of the cell controls all its activities? Cytoplasm RibosomeNucleusMitochondriaC) NucleusThe nucleus acts as the control center of the cell.
What is the normal lifespan of red blood cells? 10 days30 days60 days 120 daysD) 120 daysRBCs usually live for about 120 days.
Which disease is caused by a lack of insulin?MalariaDiabetesTuberculosisTyphoidB) Diabetes: Diabetes occurs when insulin production is impaired.
Which plant hormone is responsible for cell elongation? Auxin CytokininEthyleneAbscisic acid: A) Auxin: Auxins promote elongation of plant cells.
What is the largest artery in the human body? Vein Pulmonary arteryAorta Coronary artery: C) Aortav The aorta is the largest artery, carrying blood from the heart.
What is the main waste product of respiration? OxygenNitrogen Carbon dioxideHydrogenC) Carbon dioxide Respiration produces COâ‚‚ as a waste product.
Which blood vessels carry blood back to the heart?ArteriesVeinsCapillaries Arterioles B) Veins Veins return deoxygenated blood to the heart.
Which is the largest gland in the human body? Thyroid LiverPancreasAdrenal gland B) Liver The liver is the largest gland in the human body.
What type of reproduction involves only one parent?Sexual Asexual BinaryFusionB) Asexual Asexual reproduction requires only one parent.
Which organelle is known as the "suicide bag" of the cell?RibosomeLysosome Mitochondria Nucleus B) Lysosome Lysosomes break down waste and damaged cell parts.
What do we call animals that eat only plants?Carnivores Omnivores HerbivoresScavengers C) Herbivores: Herbivores feed exclusively on plants.
Which mineral is essential for making hemoglobin?CalciumPotassiumIronZincC) IronIron is vital for hemoglobin formation in blood.
Which part of the human body is made up of keratin? BonesMuscles NailsHeartC) Nails: Nails are composed of keratin, a tough protein.