421. In basic biology, which pigment gives many plants their green colour?
✅ A. Chlorophyll
a: Chlorophyll | b: Melanin | c: Haemoglobin | d: Keratin Read more
Biology MCQs – Page 22
422. In basic biology, 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
423. In basic biology, which molecule carries hereditary information in most organisms?
✅ D. DNA
a: Cellulose | b: Glucose | c: ATP | d: DNA Read more
424. In basic biology, which organelle is often called the powerhouse of the cell?
✅ C. Mitochondrion
a: Lysosome | b: Golgi apparatus | c: Mitochondrion | d: Ribosome Read more
425. Which gas is released by plants during photosynthesis?
✅ C. Oxygen
a: Carbon monoxide | b: Methane | c: Oxygen | d: Ammonia Read more
426. In basic biology, what is the basic structural and functional unit of life?
✅ D. Cell
a: Organ system | b: Tissue | c: Organ | d: Cell Read more
427. Which process reduces chromosome number to form gametes?
✅ B. Meiosis
a: Mitosis | b: Meiosis | c: Budding | d: Binary fission Read more
428. Which plant tissue transports sugars?
✅ D. Phloem
a: Cuticle | b: Xylem | c: Stomata | d: Phloem Read more
429. Which plant tissue transports water upward?
✅ B. Xylem
a: Epidermis | b: Xylem | c: Phloem | d: Cortex only Read more
430. Which part of the eye controls the amount of light entering?
✅ A. Iris
a: Iris | b: Optic nerve | c: Retina | d: Cornea only Read more
431. Which blood component helps form clots?
✅ A. Platelets
a: Platelets | b: Neurons | c: Red blood cells | d: Alveoli Read more
432. What is the largest organ of the human body?
✅ A. Skin
a: Skin | b: Brain | c: Lung | d: Liver Read more
433. Which structure controls what enters and leaves a cell?
✅ A. Cell membrane
a: Cell membrane | b: Nucleolus | c: Chromosome | d: Cell wall only Read more
434. Which molecule is the main immediate energy currency of cells?
✅ B. ATP
a: DNA | b: ATP | c: Starch | d: RNA Read more
435. Which organisms make their own food using sunlight in most ecosystems?
✅ D. Producers
a: Decomposers only | b: Predators | c: Primary consumers | d: Producers Read more
436. What is the study of insects called?
✅ A. Entomology
a: Entomology | b: Botany | c: Herpetology | d: Mycology Read more
437. What is the study of fungi called?
✅ D. Mycology
a: Ornithology | b: Ecology | c: Entomology | d: Mycology Read more
438. Which part of the brain helps coordinate balance and movement?
✅ C. Cerebellum
a: Pituitary gland | b: Medulla only | c: Cerebellum | d: Hypothalamus Read more
439. Which organ produces insulin?
✅ C. Pancreas
a: Thyroid | b: Spleen | c: Pancreas | d: Gallbladder Read more
440. Which biological process produces two genetically similar daughter cells for growth?
✅ C. Mitosis
a: Transcription | b: Meiosis | c: Mitosis | d: Fertilization Read more