Biology MCQs (181–210) with Answers and Reasons are prepared for NEET, CUET, and Board exam practice.
This MCQ set covers important topics from Human Physiology, Plant Physiology, Cell Biology, and Ecology.
Regular practice of these objective questions improves accuracy and conceptual clarity.
181. Which organ pumps blood throughout the human body?
Correct Answer: A
Reason: The heart pumps blood to all parts of the body.
182. Which part of the brain controls balance and posture?
Correct Answer: B
Reason: Cerebellum maintains balance and body posture.
183. Which blood vessel carries oxygenated blood from the heart to the body?
Correct Answer: A
Reason: Aorta carries oxygenated blood to body tissues.
184. Which enzyme digests proteins in the stomach?
Correct Answer: C
Reason: Pepsin digests proteins in acidic medium.
185. Which gas is taken in by plants during photosynthesis?
Correct Answer: B
Reason: Carbon dioxide is required for glucose synthesis.
186. Which plant tissue transports water and minerals?
Correct Answer: A
Reason: Xylem conducts water and dissolved minerals.
187. Which vitamin helps in blood clotting?
Correct Answer: D
Reason: Vitamin K is required for synthesis of clotting factors.
188. Which organ stores bile juice?
Correct Answer: B
Reason: Gall bladder stores bile produced by the liver.
189. The smallest unit of life is:
Correct Answer: D
Reason: Cell is the basic structural and functional unit of life.
190. Which organ is responsible for detoxification?
Correct Answer: C
Reason: Liver detoxifies harmful chemicals from blood.
191. Which structure connects muscles to bones?
Correct Answer: B
Reason: Tendons attach muscles to bones.
192. Which microorganism causes malaria?
Correct Answer: C
Reason: Malaria is caused by the protozoan Plasmodium.
193. Which part of the flower develops into fruit?
Correct Answer: D
Reason: Ovary develops into fruit after fertilization.
194. Which gas is essential for respiration?
Correct Answer: A
Reason: Oxygen is needed for energy release.
195. Which vitamin deficiency causes rickets?
Correct Answer: D
Reason: Vitamin D deficiency affects bone mineralization.
196. Which organelle contains chlorophyll?
Correct Answer: B
Reason: Chloroplast contains chlorophyll pigment.
197. Which blood group is known as universal donor?
Correct Answer: D
Reason: Blood group O can be donated to all groups.
198. Which plant hormone promotes cell elongation?
Correct Answer: A
Reason: Auxin stimulates cell elongation.
199. Which organ stores urine temporarily?
Correct Answer: C
Reason: Urinary bladder stores urine before excretion.
200. Which enzyme digests starch in saliva?
Correct Answer: A
Reason: Salivary amylase breaks starch into sugars.
201. Which gas is released during respiration?
Correct Answer: B
Reason: Carbon dioxide is a waste product of respiration.
202. Which part of the cell controls all activities?
Correct Answer: D
Reason: Nucleus controls cellular functions.
203. Which vitamin prevents night blindness?
Correct Answer: A
Reason: Vitamin A is required for vision.
204. Which organism fixes atmospheric nitrogen?
Correct Answer: C
Reason: Rhizobium fixes nitrogen in legume roots.
205. Which plant hormone inhibits growth?
Correct Answer: D
Reason: Abscisic acid acts as a growth inhibitor.
206. Which part of the eye contains photoreceptors?
Correct Answer: B
Reason: Retina contains rods and cones.
207. Which organ produces insulin?
Correct Answer: A
Reason: Pancreas secretes insulin hormone.
208. Which level of organization includes population and community?
Correct Answer: D
Reason: Population and community are ecological levels.
209. Which gas is used by plants in photosynthesis?
Correct Answer: B
Reason: Carbon dioxide is required for photosynthesis.
210. The functional unit of the nervous system is:
Correct Answer: A
Reason: Neuron transmits nerve impulses.
Biology MCQs (181–210) FAQs
1. Are these MCQs useful for NEET Biology?
Yes, these MCQs are strictly based on NCERT concepts important for NEET.
2. Do all questions include answers with reasons?
Yes, every MCQ includes a clear answer and a short reason.
3. Which chapters are mainly covered in this part?
Human physiology, plant physiology, cell biology, and ecology.
4. How should students practice these MCQs?
Solve daily and revise the related NCERT chapters for best results.
5. Will the next part also be in English?
Yes, all upcoming Biology MCQ parts will be completely in English.
Yes, these MCQs are strictly based on NCERT concepts important for NEET.
2. Do all questions include answers with reasons?
Yes, every MCQ includes a clear answer and a short reason.
3. Which chapters are mainly covered in this part?
Human physiology, plant physiology, cell biology, and ecology.
4. How should students practice these MCQs?
Solve daily and revise the related NCERT chapters for best results.
5. Will the next part also be in English?
Yes, all upcoming Biology MCQ parts will be completely in English.
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