Biology MCQs (91–120) with Answers and Reasons are prepared to strengthen important concepts from Human Physiology, Plant Biology, Microbiology, and Genetics.
This objective question set is useful for NEET Biology revision and helps students practice frequently asked Biology fundamentals for school and competitive MCQ exams.
Regular MCQ practice improves recall power, eliminates confusion between similar terms, and supports faster revision before exams.
Regular MCQ practice improves recall power, eliminates confusion between similar terms, and supports faster revision before exams.
91. The basic unit of nervous system is:
Correct Answer: B
Reason: Neuron is the structural and functional unit that transmits nerve impulses.
92. The site of fertilization in human females is:
Correct Answer: C
Reason: Fertilization generally occurs in the ampullary region of the fallopian tube.
93. The part of plant responsible for absorption of water is:
Correct Answer: D
Reason: Root hairs provide a large surface area for absorption of water and minerals.
94. Which gas is essential for photosynthesis?
Correct Answer: B
Reason: Plants use CO2 to synthesize glucose during photosynthesis.
95. The disease caused by deficiency of vitamin D is:
Correct Answer: A
Reason: Vitamin D deficiency causes weak bones and deformities known as rickets.
96. The process of making food in green plants is:
Correct Answer: C
Reason: Photosynthesis produces glucose using sunlight, water, and carbon dioxide.
97. The organ that produces insulin is:
Correct Answer: D
Reason: Beta cells of pancreas secrete insulin to control blood glucose level.
98. The site of protein synthesis is:
Correct Answer: B
Reason: Ribosomes are the cellular structures where proteins are synthesized.
99. The microorganism used in fermentation of bread is:
Correct Answer: C
Reason: Yeast produces carbon dioxide during fermentation, making dough rise.
100. The excretory unit of kidney is:
Correct Answer: A
Reason: Nephrons filter blood and form urine in the kidneys.
101. The plant tissue that transports food is:
Correct Answer: D
Reason: Phloem transports prepared food from leaves to other plant parts.
102. The green pigment in plants is:
Correct Answer: C
Reason: Chlorophyll captures light energy to perform photosynthesis.
103. Which organ stores bile?
Correct Answer: B
Reason: Gall bladder stores and concentrates bile produced by liver.
104. The blood cells that fight infection are:
Correct Answer: D
Reason: White blood cells defend the body against pathogens and infections.
105. The phase of mitosis when chromosomes align at equator is:
Correct Answer: B
Reason: In metaphase, chromosomes line up at the cell’s equatorial plate.
106. The main function of roots is:
Correct Answer: D
Reason: Roots absorb water and minerals and hold the plant firmly in soil.
107. The term used for animals that eat only plants is:
Correct Answer: A
Reason: Herbivores feed on plant material such as grass and leaves.
108. The part of flower that develops into fruit is:
Correct Answer: C
Reason: After fertilization, the ovary matures and forms the fruit.
109. The number of chambers in human heart is:
Correct Answer: D
Reason: Human heart has four chambers: two atria and two ventricles.
110. Which organ helps in detoxification in humans?
Correct Answer: A
Reason: Liver breaks down toxins and helps in detoxification of harmful substances.
111. The smallest bone in human body is:
Correct Answer: C
Reason: Stapes is a tiny bone in the middle ear and is the smallest bone.
112. The energy currency of the cell is:
Correct Answer: D
Reason: ATP stores and supplies energy for cellular activities.
113. Which of the following helps in blood clotting?
Correct Answer: B
Reason: Platelets form clots and prevent excessive bleeding during injury.
114. The branch of biology dealing with classification is:
Correct Answer: A
Reason: Taxonomy includes identification, naming, and classification of organisms.
115. The smallest unit of life is:
Correct Answer: C
Reason: Cell is the basic structural and functional unit of living beings.
116. The part of the brain that controls involuntary actions is:
Correct Answer: D
Reason: Medulla controls involuntary actions like breathing and heartbeat.
117. The process of evaporation of water from plant leaves is:
Correct Answer: B
Reason: Transpiration is the loss of water vapour mainly through stomata.
118. The vector for dengue fever is:
Correct Answer: C
Reason: Dengue spreads through the bite of Aedes aegypti mosquito.
119. Which component of blood transports nutrients and hormones?
Correct Answer: A
Reason: Plasma is the liquid portion that carries nutrients, hormones, and wastes.
120. The process of converting RNA into protein is:
Correct Answer: D
Reason: Translation is the process where ribosomes synthesize protein from mRNA.
Biology MCQs (91–120) FAQs
1. Which topics are covered in Biology MCQs (91–120)?
This set includes human physiology basics, plant tissues, cell organelles, microbiology, and genetics fundamentals.
2. Are these Biology MCQs suitable for NEET Biology?
Yes, these MCQs are useful for NEET revision and help strengthen basic NCERT concepts.
3. Do these MCQs provide answers with reasons?
Yes, each question has the correct answer along with a short “Reason” for easy understanding.
4. How can students revise Biology faster using MCQs?
Solve a fixed number daily, review reasons carefully, and revise weak topics regularly.
5. Which chapter should be revised next after this set?
Students can revise human digestion, respiration, immunity, and plant physiology for better coverage.
This set includes human physiology basics, plant tissues, cell organelles, microbiology, and genetics fundamentals.
2. Are these Biology MCQs suitable for NEET Biology?
Yes, these MCQs are useful for NEET revision and help strengthen basic NCERT concepts.
3. Do these MCQs provide answers with reasons?
Yes, each question has the correct answer along with a short “Reason” for easy understanding.
4. How can students revise Biology faster using MCQs?
Solve a fixed number daily, review reasons carefully, and revise weak topics regularly.
5. Which chapter should be revised next after this set?
Students can revise human digestion, respiration, immunity, and plant physiology for better coverage.
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