NEET Biology MCQ Test 2025: Practice 20 Most Expected Questions with Answers

 NEET Biology MCQ Test 2025: Practice 20 Most Expected Questions with Answers

Prepare smarter for NEET 2025 with our latest NEET Biology MCQ Test featuring 20 most expected questions and answers. This post is designed to help students revise key concepts in Human Physiology, Genetics, Plant Biology, and Ecology—all crucial for cracking the NEET exam. Whether you're aiming for a top medical college or just brushing up on your basics, these Biology MCQs for NEET will boost your confidence and accuracy. Each question is crafted to reflect the latest NEET pattern and syllabus, making it ideal for last-minute revision. With detailed answers and keyword-rich explanations, this test is perfect for self-assessment and concept clarity. Bookmark this page and share it with fellow aspirants. Stay ahead in your NEET preparation journey with , your trusted source for exam-ready MCQs, GK, and current affairs.

Target Keywords: NEET Biology MCQ Test, NEET 2025, Biology MCQs with Answers, NEET Practice Questions, NEET Preparation

1. Which organelle is known as the powerhouse of the cell?
   a) Nucleus
   b) Ribosome
   c) Mitochondria ✅
   d) Golgi apparatus
   Explanation: Mitochondria produce ATP through cellular respiration.
2. Which hormone regulates blood sugar levels?
   a) Thyroxine
   b) Insulin ✅
   c) Adrenaline
   d) Estrogen
   Explanation: Insulin lowers blood glucose levels.
3. DNA replication occurs during which phase of the cell cycle?
   a) G1
   b) G2
   c) S ✅
   d) M
   Explanation: The S phase is the synthesis phase where DNA replicates.
4. Which part of the brain controls voluntary actions?
   a) Cerebellum
   b) Medulla
   c) Cerebrum ✅
   d) Pons
   Explanation: The cerebrum is responsible for voluntary motor functions.
5. Which plant hormone promotes cell elongation?
   a) Cytokinin
   b) Auxin ✅
   c) Gibberellin
   d) Abscisic acid
   Explanation: Auxin stimulates elongation of cells in shoots.
6. Which blood group is known as the universal donor?
   a) AB+
   b) O- ✅
   c) A+
   d) B-
   Explanation: O- can be donated to any blood group.
7. Which enzyme is present in saliva?
   a) Pepsin
   b) Trypsin
   c) Amylase ✅
   d) Lipase
   Explanation: Amylase breaks down starch into sugars.
8. Which structure in plants is responsible for photosynthesis?
   a) Mitochondria
   b) Chloroplast ✅
   c) Nucleus
   d) Ribosome
   Explanation: Chloroplast contains chlorophyll for photosynthesis.
9. Which vitamin is synthesized in the skin?
   a) Vitamin A
   b) Vitamin C
   c) Vitamin D ✅
   d) Vitamin K
   Explanation: Vitamin D is synthesized when skin is exposed to sunlight.
10. Which process converts glucose into energy?
    a) Photosynthesis
    b) Respiration ✅
    c) Transpiration
    d) Fermentation
    Explanation: Cellular respiration breaks down glucose to release energy.
11. Which organ filters blood in the human body?
    a) Heart
    b) Liver
    c) Kidney ✅
    d) Lung
    Explanation: Kidneys filter waste from blood.
12. Which part of the flower develops into fruit?
    a) Ovary ✅
    b) Ovule
    c) Petal
    d) Sepal
    Explanation: Ovary matures into fruit after fertilization.
13. Which disease is caused by Plasmodium?
    a) Dengue
    b) Malaria ✅
    c) Typhoid
    d) Cholera
    Explanation: Plasmodium is a protozoan parasite causing malaria.
14. Which gas is released during photosynthesis?
    a) CO₂
    b) O₂ ✅
    c) N₂
    d) H₂
    Explanation: Oxygen is released as a byproduct.
15. Which organ secretes bile?
    a) Pancreas
    b) Liver ✅
    c) Gallbladder
    d) Stomach
    Explanation: Liver produces bile for fat digestion.
16. Which cell organelle is involved in protein synthesis?
    a) Ribosome ✅
    b) Lysosome
    c) Golgi body
    d) Vacuole
    Explanation: Ribosomes synthesize proteins.
17. Which part of the nephron filters blood?
    a) Loop of Henle
    b) Glomerulus ✅
    c) Collecting duct
    d) Bowman’s capsule (Note: technically the glomerulus is inside Bowman's capsule but filtration occurs at the glomerulus)
    Explanation: Glomerulus filters blood in the nephron.
18. Which molecule carries genetic information?
    a) RNA
    b) DNA ✅
    c) Protein
    d) Lipid
    Explanation: DNA stores genetic instructions.

19. Which process helps in water absorption in roots?
    a) Diffusion
    b) Osmosis ✅
    c) Transpiration
    d) Active transport
    Explanation: Osmosis allows water to move into root cells.

20. Which blood vessel carries oxygenated blood from the lungs to the heart?
    a) Pulmonary artery
    b) Pulmonary vein ✅
    c) Vena cava
    d) Aorta
    Explanation: Pulmonary vein carries oxygen-rich blood from lungs to heart.

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