221. Which option correctly completes the fact: which organ filters blood to produce urine?
✅ D. Kidney
a: Lung | b: Pancreas | c: Stomach | d: Kidney Read more
Biology MCQs – Page 12
222. Which option correctly completes the fact: 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
223. Which option correctly completes the fact: which organelle is often called the powerhouse of the cell?
✅ A. Mitochondrion
a: Mitochondrion | b: Lysosome | c: Golgi apparatus | d: Ribosome Read more
224. Which option correctly completes the fact: which molecule carries hereditary information in most organisms?
✅ B. DNA
a: Glucose | b: DNA | c: Cellulose | d: ATP Read more
225. Which option correctly completes the fact: what is the basic structural and functional unit of life?
✅ C. Cell
a: Organ | b: Organ system | c: Cell | d: Tissue Read more
226. In basic biology, which gas is released by plants during photosynthesis?
✅ B. Oxygen
a: Ammonia | b: Oxygen | c: Methane | d: Carbon monoxide Read more
227. In basic biology, which process reduces chromosome number to form gametes?
✅ A. Meiosis
a: Meiosis | b: Binary fission | c: Mitosis | d: Budding Read more
228. In basic biology, which plant tissue transports sugars?
✅ A. Phloem
a: Phloem | b: Xylem | c: Cuticle | d: Stomata Read more
229. In basic biology, which plant tissue transports water upward?
✅ B. Xylem
a: Epidermis | b: Xylem | c: Phloem | d: Cortex only Read more
230. In basic biology, which blood component helps form clots?
✅ B. Platelets
a: Alveoli | b: Platelets | c: Red blood cells | d: Neurons Read more
231. In basic biology, which part of the eye controls the amount of light entering?
✅ D. Iris
a: Cornea only | b: Optic nerve | c: Retina | d: Iris Read more
232. In basic biology, what is the largest organ of the human body?
✅ C. Skin
a: Lung | b: Liver | c: Skin | d: Brain Read more
233. In basic biology, which structure controls what enters and leaves a cell?
✅ A. Cell membrane
a: Cell membrane | b: Cell wall only | c: Nucleolus | d: Chromosome Read more
234. In basic biology, which molecule is the main immediate energy currency of cells?
✅ D. ATP
a: DNA | b: RNA | c: Starch | d: ATP Read more
235. In basic biology, which organisms make their own food using sunlight in most ecosystems?
✅ C. Producers
a: Primary consumers | b: Predators | c: Producers | d: Decomposers only Read more
236. In basic biology, what is the study of insects called?
✅ A. Entomology
a: Entomology | b: Botany | c: Mycology | d: Herpetology Read more
237. In basic biology, what is the study of fungi called?
✅ B. Mycology
a: Entomology | b: Mycology | c: Ecology | d: Ornithology Read more
238. In basic biology, which organ produces insulin?
✅ B. Pancreas
a: Gallbladder | b: Pancreas | c: Thyroid | d: Spleen Read more
239. In basic biology, which part of the brain helps coordinate balance and movement?
✅ B. Cerebellum
a: Medulla only | b: Cerebellum | c: Hypothalamus | d: Pituitary gland Read more
240. In basic biology, which biological process produces two genetically similar daughter cells for growth?
✅ D. Mitosis
a: Meiosis | b: Fertilization | c: Transcription | d: Mitosis Read more