601. 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
Biology MCQs – Page 31
602. Which process reduces chromosome number to form gametes?
✅ B. Meiosis
a: Mitosis | b: Meiosis | c: Budding | d: Binary fission Read more
603. Which plant tissue transports sugars?
✅ D. Phloem
a: Cuticle | b: Xylem | c: Stomata | d: Phloem Read more
604. Which plant tissue transports water upward?
✅ B. Xylem
a: Epidermis | b: Xylem | c: Phloem | d: Cortex only Read more
605. Which blood component helps form clots?
✅ A. Platelets
a: Platelets | b: Neurons | c: Red blood cells | d: Alveoli Read more
606. What is the largest organ of the human body?
✅ A. Skin
a: Skin | b: Brain | c: Lung | d: Liver Read more
607. 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
608. 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
609. 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
610. Which molecule is the main immediate energy currency of cells?
✅ B. ATP
a: DNA | b: ATP | c: Starch | d: RNA Read more
611. What is the study of insects called?
✅ A. Entomology
a: Entomology | b: Botany | c: Herpetology | d: Mycology Read more
612. What is the study of fungi called?
✅ D. Mycology
a: Ornithology | b: Ecology | c: Entomology | d: Mycology Read more
613. Which organ produces insulin?
✅ C. Pancreas
a: Thyroid | b: Spleen | c: Pancreas | d: Gallbladder Read more
614. Which part of the brain helps coordinate balance and movement?
✅ C. Cerebellum
a: Pituitary gland | b: Medulla only | c: Cerebellum | d: Hypothalamus Read more
615. Which biological process produces two genetically similar daughter cells for growth?
✅ C. Mitosis
a: Transcription | b: Meiosis | c: Mitosis | d: Fertilization Read more
616. Which vitamin is essential for normal blood clotting?
✅ D. Vitamin K
a: Vitamin D | b: Vitamin C | c: Vitamin B1 | d: Vitamin K Read more
617. Which cells help defend the body against infection?
✅ B. White blood cells
a: Platelets | b: White blood cells | c: Red blood cells | d: Adipocytes Read more
618. Which organ is primarily responsible for gas exchange in humans?
✅ B. Lungs
a: Spleen | b: Lungs | c: Gallbladder | d: Heart Read more
619. Which pigment gives many plants their green colour?
✅ B. Chlorophyll
a: Haemoglobin | b: Chlorophyll | c: Keratin | d: Melanin Read more
620. Which part of a plant absorbs most water from soil?
✅ B. Roots
a: Leaves only | b: Roots | c: Flowers | d: Fruits Read more