Biology MCQs (121–150) with Answers and Reasons are designed to strengthen concepts from Human Physiology, Plant Reproduction, Cell Division, Environment, and Health.
These MCQs are useful for NEET Biology preparation and school-level exams where NCERT-based objective questions are frequently asked.
Regular practice helps in quick revision, better concept clarity, and exam confidence.
Regular practice helps in quick revision, better concept clarity, and exam confidence.
121. The process of cell division in reproductive cells is:
Correct Answer: B
Reason: Meiosis forms haploid gametes by reducing chromosome number.
122. The male reproductive organ in flowering plants is:
Correct Answer: D
Reason: Stamen consists of anther and filament and produces pollen.
123. The female reproductive organ in flowering plants is:
Correct Answer: C
Reason: Pistil includes stigma, style, and ovary.
124. The fusion of male and female gametes is called:
Correct Answer: A
Reason: Fertilization forms a zygote by fusion of gametes.
125. Which hormone regulates blood sugar level?
Correct Answer: B
Reason: Insulin controls glucose level in blood.
126. The organ responsible for hearing is:
Correct Answer: D
Reason: Ear detects sound vibrations and maintains balance.
127. Which vitamin helps in blood clotting?
Correct Answer: C
Reason: Vitamin K is essential for synthesis of clotting factors.
128. The process by which seeds begin to grow is:
Correct Answer: A
Reason: Germination is sprouting of seed into a seedling.
129. Which organ filters blood in humans?
Correct Answer: D
Reason: Kidneys filter blood and remove nitrogenous wastes.
130. The green pigment present in leaves is:
Correct Answer: B
Reason: Chlorophyll absorbs light for photosynthesis.
131. The structural unit of kidney is:
Correct Answer: A
Reason: Nephron is the functional and structural unit of kidney.
132. Which gas is released during photosynthesis?
Correct Answer: D
Reason: Oxygen is released as a by-product of photosynthesis.
133. The largest organ of human body is:
Correct Answer: C
Reason: Skin covers the entire body and protects internal organs.
134. Which blood group is universal donor?
Correct Answer: D
Reason: O group blood can be donated to all ABO groups.
135. Which part of brain controls balance?
Correct Answer: B
Reason: Cerebellum maintains posture and balance.
136. The process of breathing in humans is:
Correct Answer: A
Reason: Respiration involves inhalation and exhalation of gases.
137. Which tissue transports water in plants?
Correct Answer: A
Reason: Xylem carries water and minerals upward in plants.
138. Which organ helps in digestion of proteins?
Correct Answer: B
Reason: Pepsin enzyme in stomach digests proteins.
139. The study of plants is called:
Correct Answer: C
Reason: Botany is the branch of biology dealing with plants.
140. The study of animals is called:
Correct Answer: A
Reason: Zoology deals with animal life.
141. Which organ produces bile?
Correct Answer: A
Reason: Liver produces bile which helps in fat digestion.
142. The smallest unit of life is:
Correct Answer: D
Reason: Cell performs all basic life functions.
143. Which blood cells transport oxygen?
Correct Answer: A
Reason: Hemoglobin in RBCs carries oxygen.
144. The movement of pollen from anther to stigma is:
Correct Answer: B
Reason: Pollination transfers pollen to stigma.
145. Which organ is affected in hepatitis?
Correct Answer: C
Reason: Hepatitis is inflammation of the liver.
146. Which vitamin is synthesized in skin?
Correct Answer: D
Reason: Vitamin D is produced in skin in presence of sunlight.
147. The part of eye that forms image is:
Correct Answer: B
Reason: Retina contains photoreceptors where image is formed.
148. The respiratory pigment in humans is:
Correct Answer: A
Reason: Hemoglobin binds oxygen in blood.
149. Which part of plant conducts food?
Correct Answer: C
Reason: Phloem transports prepared food.
150. The unit of heredity is:
Correct Answer: B
Reason: Gene is the basic unit that carries hereditary information.
Biology MCQs (121–150) FAQs
1. Are these MCQs useful for NEET Biology?
Yes, these questions are NCERT-based and useful for quick NEET revision.
2. Do these MCQs include explanations?
Each question includes the correct answer with a short Reason.
3. Which topics are covered in this part?
Human physiology, plant reproduction, cell division, and health topics.
4. Can school students use these MCQs?
Yes, they are suitable for class 9–12 Biology exams.
5. How should I practice these MCQs?
Solve daily, note weak areas, and revise related NCERT chapters.
Yes, these questions are NCERT-based and useful for quick NEET revision.
2. Do these MCQs include explanations?
Each question includes the correct answer with a short Reason.
3. Which topics are covered in this part?
Human physiology, plant reproduction, cell division, and health topics.
4. Can school students use these MCQs?
Yes, they are suitable for class 9–12 Biology exams.
5. How should I practice these MCQs?
Solve daily, note weak areas, and revise related NCERT chapters.
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