Biology MCQs (151–180) with Answers and Reasons are designed for NEET, CUET, and Board exam preparation.
This set covers important topics from Cell Biology, Human Physiology, Plant Physiology, and Basic Ecology.
Regular practice of these MCQs helps improve accuracy, speed, and conceptual clarity.
151. Which organelle is known as the powerhouse of the cell?
Correct Answer: B
Reason: Mitochondria produce ATP, which supplies energy to the cell.
152. The functional unit of the kidney is:
Correct Answer: A
Reason: Nephron filters blood and forms urine.
153. Which blood component helps in blood clotting?
Correct Answer: C
Reason: Platelets initiate the blood clotting process.
154. Which pigment is essential for photosynthesis?
Correct Answer: B
Reason: Chlorophyll absorbs light energy for photosynthesis.
155. Which gas is released during photosynthesis?
Correct Answer: D
Reason: Oxygen is released as a by-product of photosynthesis.
156. Which hormone regulates blood glucose level?
Correct Answer: B
Reason: Insulin lowers blood glucose level.
157. Which organ produces bile?
Correct Answer: A
Reason: Liver produces bile required for fat digestion.
158. Which vitamin deficiency causes night blindness?
Correct Answer: A
Reason: Vitamin A is essential for vision.
159. The basic unit of life is:
Correct Answer: D
Reason: Cell is the smallest unit of life.
160. Which gas is essential for respiration?
Correct Answer: A
Reason: Oxygen is required for energy release.
161. Which enzyme digests proteins in the stomach?
Correct Answer: C
Reason: Pepsin digests proteins in acidic conditions.
162. Which blood group is known as the universal donor?
Correct Answer: D
Reason: Blood group O can be donated to all groups.
163. Which organ detoxifies harmful substances?
Correct Answer: B
Reason: Liver detoxifies chemicals and drugs.
164. Which plant tissue transports food?
Correct Answer: C
Reason: Phloem transports prepared food.
165. Which disease is caused by bacteria?
Correct Answer: B
Reason: Tuberculosis is caused by bacteria.
166. Which part of the flower develops into fruit?
Correct Answer: D
Reason: Ovary develops into fruit after fertilization.
167. Which gas is used in respiration?
Correct Answer: A
Reason: Oxygen is required for cellular respiration.
168. Which vitamin helps in blood clotting?
Correct Answer: D
Reason: Vitamin K is required for clotting factor synthesis.
169. Which structure connects muscle to bone?
Correct Answer: B
Reason: Tendons attach muscles to bones.
170. Which organism fixes atmospheric nitrogen?
Correct Answer: C
Reason: Rhizobium fixes nitrogen in legume roots.
171. Which organ stores urine temporarily?
Correct Answer: C
Reason: Urinary bladder stores urine before excretion.
172. Which enzyme digests starch in saliva?
Correct Answer: A
Reason: Salivary amylase breaks starch into sugars.
173. Which organ produces insulin?
Correct Answer: A
Reason: Pancreas secretes insulin hormone.
174. Which part of the eye contains photoreceptors?
Correct Answer: B
Reason: Retina contains rods and cones.
175. Which vitamin deficiency causes rickets?
Correct Answer: D
Reason: Vitamin D deficiency affects bone mineralization.
176. Which level of organization includes population and community?
Correct Answer: D
Reason: Population and community belong to ecology.
177. Which gas is released during respiration?
Correct Answer: B
Reason: Carbon dioxide is a waste product of respiration.
178. Which cell organelle contains digestive enzymes?
Correct Answer: D
Reason: Lysosomes contain digestive enzymes.
179. Which part of the brain controls involuntary actions?
Correct Answer: C
Reason: Medulla controls involuntary actions.
180. Which organism causes malaria?
Correct Answer: B
Reason: Malaria is caused by the protozoan Plasmodium.
Biology MCQs (151–180) FAQs
1. Are these MCQs based on NCERT?
Yes, these questions are strictly based on NCERT Biology.
2. Are they useful for NEET?
Yes, they are important for NEET and board examinations.
3. Do all MCQs include reasons?
Yes, each MCQ includes a short and clear reason.
4. How many MCQs should be practiced daily?
Practicing 20–30 MCQs daily is ideal.
5. Will the next part also follow the same pattern?
Yes, all upcoming parts will follow the same format.
Yes, these questions are strictly based on NCERT Biology.
2. Are they useful for NEET?
Yes, they are important for NEET and board examinations.
3. Do all MCQs include reasons?
Yes, each MCQ includes a short and clear reason.
4. How many MCQs should be practiced daily?
Practicing 20–30 MCQs daily is ideal.
5. Will the next part also follow the same pattern?
Yes, all upcoming parts will follow the same format.
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