281. Practice check: Choose the correct biology answer: what is the largest organ of the human body?
✅ B. Skin
a: Brain | b: Skin | c: Liver | d: Lung Read more
Biology MCQs – Page 15
282. Practice check: Choose the correct biology answer: which part of the eye controls the amount of light entering?
✅ D. Iris
a: Optic nerve | b: Retina | c: Cornea only | d: Iris Read more
283. Practice check: Choose the correct biology answer: which structure controls what enters and leaves a cell?
✅ B. Cell membrane
a: Cell wall only | b: Cell membrane | c: Chromosome | d: Nucleolus Read more
284. Practice check: Choose the correct biology answer: which molecule is the main immediate energy currency of cells?
✅ B. ATP
a: RNA | b: ATP | c: DNA | d: Starch Read more
285. Practice check: Choose the correct biology answer: which organisms make their own food using sunlight in most ecosystems?
✅ B. Producers
a: Primary consumers | b: Producers | c: Predators | d: Decomposers only Read more
286. Practice check: Choose the correct biology answer: what is the study of insects called?
✅ C. Entomology
a: Mycology | b: Herpetology | c: Entomology | d: Botany Read more
287. Practice check: Choose the correct biology answer: what is the study of fungi called?
✅ A. Mycology
a: Mycology | b: Ecology | c: Entomology | d: Ornithology Read more
288. Practice check: Choose the correct biology answer: which organ produces insulin?
✅ A. Pancreas
a: Pancreas | b: Thyroid | c: Gallbladder | d: Spleen Read more
289. Practice check: Choose the correct biology answer: which part of the brain helps coordinate balance and movement?
✅ A. Cerebellum
a: Cerebellum | b: Pituitary gland | c: Hypothalamus | d: Medulla only Read more
290. Practice check: Choose the correct biology answer: which biological process produces two genetically similar daughter cells for growth?
✅ B. Mitosis
a: Fertilization | b: Mitosis | c: Meiosis | d: Transcription Read more
291. Practice check: Choose the correct biology answer: which vitamin is essential for normal blood clotting?
✅ C. Vitamin K
a: Vitamin B1 | b: Vitamin D | c: Vitamin K | d: Vitamin C Read more
292. Practice check: Choose the correct biology answer: which cells help defend the body against infection?
✅ D. White blood cells
a: Red blood cells | b: Adipocytes | c: Platelets | d: White blood cells Read more
293. Practice check: Choose the correct biology answer: which part of a plant absorbs most water from soil?
✅ B. Roots
a: Flowers | b: Roots | c: Fruits | d: Leaves only Read more
294. Practice check: Choose the correct biology answer: which organ is primarily responsible for gas exchange in humans?
✅ D. Lungs
a: Spleen | b: Heart | c: Gallbladder | d: Lungs Read more
295. Practice check: Choose the correct biology answer: which pigment gives many plants their green colour?
✅ A. Chlorophyll
a: Chlorophyll | b: Melanin | c: Haemoglobin | d: Keratin Read more
296. Practice check: Choose the correct biology answer: which organ filters blood to produce urine?
✅ D. Kidney
a: Stomach | b: Pancreas | c: Lung | d: Kidney Read more
297. Practice check: Choose the correct biology answer: which molecule carries hereditary information in most organisms?
✅ D. DNA
a: ATP | b: Glucose | c: Cellulose | d: DNA Read more
298. Practice check: Choose the correct biology answer: which blood type is commonly called the universal red-cell donor in emergency contexts?
✅ A. O negative
a: O negative | b: B negative | c: A positive | d: AB positive Read more
299. Practice check: Choose the correct biology answer: which organelle is often called the powerhouse of the cell?
✅ C. Mitochondrion
a: Lysosome | b: Golgi apparatus | c: Mitochondrion | d: Ribosome Read more
300. Practice check: Choose the correct biology answer: what is the basic structural and functional unit of life?
✅ C. Cell
a: Organ | b: Organ system | c: Cell | d: Tissue Read more