541. Choose the correct biology answer: which vitamin is essential for normal blood clotting?
✅ B. Vitamin K
a: Vitamin C | b: Vitamin K | c: Vitamin B1 | d: Vitamin D Read more
Biology MCQs – Page 28
542. Choose the correct biology answer: which cells help defend the body against infection?
✅ C. White blood cells
a: Red blood cells | b: Platelets | c: White blood cells | d: Adipocytes Read more
543. Choose the correct biology answer: which part of a plant absorbs most water from soil?
✅ C. Roots
a: Flowers | b: Fruits | c: Roots | d: Leaves only Read more
544. Choose the correct biology answer: which organ is primarily responsible for gas exchange in humans?
✅ A. Lungs
a: Lungs | b: Gallbladder | c: Spleen | d: Heart Read more
545. Choose the correct biology answer: which pigment gives many plants their green colour?
✅ B. Chlorophyll
a: Haemoglobin | b: Chlorophyll | c: Keratin | d: Melanin Read more
546. Choose the correct biology answer: which organ filters blood to produce urine?
✅ A. Kidney
a: Kidney | b: Lung | c: Pancreas | d: Stomach Read more
547. Choose the correct biology answer: which blood type is commonly called the universal red-cell donor in emergency contexts?
✅ B. O negative
a: B negative | b: O negative | c: AB positive | d: A positive Read more
548. Choose the correct biology answer: which organelle is often called the powerhouse of the cell?
✅ B. Mitochondrion
a: Golgi apparatus | b: Mitochondrion | c: Ribosome | d: Lysosome Read more
549. Choose the correct biology answer: which molecule carries hereditary information in most organisms?
✅ A. DNA
a: DNA | b: Glucose | c: ATP | d: Cellulose Read more
550. Choose the correct biology answer: what is the basic structural and functional unit of life?
✅ B. Cell
a: Organ system | b: Cell | c: Tissue | d: Organ Read more
551. Which option correctly completes the fact: which gas is released by plants during photosynthesis?
✅ C. Oxygen
a: Carbon monoxide | b: Methane | c: Oxygen | d: Ammonia Read more
552. Which option correctly completes the fact: which plant tissue transports sugars?
✅ B. Phloem
a: Cuticle | b: Phloem | c: Stomata | d: Xylem Read more
553. Which option correctly completes the fact: which process reduces chromosome number to form gametes?
✅ C. Meiosis
a: Mitosis | b: Budding | c: Meiosis | d: Binary fission Read more
554. Which option correctly completes the fact: which plant tissue transports water upward?
✅ A. Xylem
a: Xylem | b: Epidermis | c: Phloem | d: Cortex only Read more
555. Which option correctly completes the fact: which blood component helps form clots?
✅ A. Platelets
a: Platelets | b: Neurons | c: Red blood cells | d: Alveoli Read more
556. Which option correctly completes the fact: what is the largest organ of the human body?
✅ A. Skin
a: Skin | b: Liver | c: Brain | d: Lung Read more
557. Which option correctly completes the fact: which part of the eye controls the amount of light entering?
✅ C. Iris
a: Retina | b: Optic nerve | c: Iris | d: Cornea only Read more
558. Which option correctly completes the fact: which structure controls what enters and leaves a cell?
✅ D. Cell membrane
a: Nucleolus | b: Cell wall only | c: Chromosome | d: Cell membrane Read more
559. Which option correctly completes the fact: which molecule is the main immediate energy currency of cells?
✅ C. ATP
a: DNA | b: RNA | c: ATP | d: Starch Read more
560. Which option correctly completes the fact: what is the study of insects called?
✅ B. Entomology
a: Botany | b: Entomology | c: Herpetology | d: Mycology Read more