401. In basic biology, which process reduces chromosome number to form gametes?
✅ A. Meiosis
a: Meiosis | b: Binary fission | c: Mitosis | d: Budding Read more
Biology MCQs – Page 21
402. In basic biology, which gas is released by plants during photosynthesis?
✅ B. Oxygen
a: Ammonia | b: Oxygen | c: Methane | d: Carbon monoxide Read more
403. In basic biology, which plant tissue transports sugars?
✅ A. Phloem
a: Phloem | b: Xylem | c: Cuticle | d: Stomata Read more
404. In basic biology, which plant tissue transports water upward?
✅ B. Xylem
a: Epidermis | b: Xylem | c: Phloem | d: Cortex only Read more
405. 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
406. In basic biology, which blood component helps form clots?
✅ B. Platelets
a: Alveoli | b: Platelets | c: Red blood cells | d: Neurons Read more
407. In basic biology, what is the largest organ of the human body?
✅ C. Skin
a: Lung | b: Liver | c: Skin | d: Brain Read more
408. 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
409. 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
410. 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
411. In basic biology, what is the study of fungi called?
✅ B. Mycology
a: Entomology | b: Mycology | c: Ecology | d: Ornithology Read more
412. In basic biology, what is the study of insects called?
✅ A. Entomology
a: Entomology | b: Botany | c: Mycology | d: Herpetology Read more
413. 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
414. In basic biology, which organ produces insulin?
✅ B. Pancreas
a: Gallbladder | b: Pancreas | c: Thyroid | d: Spleen Read more
415. In basic biology, which vitamin is essential for normal blood clotting?
✅ C. Vitamin K
a: Vitamin C | b: Vitamin B1 | c: Vitamin K | d: Vitamin D Read more
416. 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
417. In basic biology, which cells help defend the body against infection?
✅ D. White blood cells
a: Adipocytes | b: Platelets | c: Red blood cells | d: White blood cells Read more
418. In basic biology, which organ is primarily responsible for gas exchange in humans?
✅ B. Lungs
a: Spleen | b: Lungs | c: Gallbladder | d: Heart Read more
419. In basic biology, which part of a plant absorbs most water from soil?
✅ C. Roots
a: Flowers | b: Fruits | c: Roots | d: Leaves only Read more
420. In basic biology, which organ filters blood to produce urine?
✅ C. Kidney
a: Stomach | b: Pancreas | c: Kidney | d: Lung Read more