Biology is the science of life — from the tiniest cell to the most complex human systems. This category is designed to support school students (Classes 6–12) as well as undergraduate (UG) learners with clear explanations, exam-focused content, and concept-building resources. You’ll find:
Concept-wise explanations aligned with NCERT and common UG syllabi
Important questions & answers for school exams, NEET foundation, and college tests
Human physiology, genetics, ecology, biotechnology, and cell biology explained simply
Practice questions, MCQs, and revision notes to strengthen understanding
Doubt-solving and conceptual clarity for competitive and academic success
Whether you’re preparing for school exams , building a strong base for NEET , or studying Biology at the undergraduate level , this section helps you learn smarter, revise faster, and understand Biology deeply — not just memorize it.
Learn life sciences the right way — clear concepts, exam relevance, and real understanding.
Q. Which of the following is NOT a function of the digestive system?
A.
Digestion of food
B.
Absorption of nutrients
C.
Regulation of body temperature
D.
Elimination of waste
Show solution
Solution
Regulation of body temperature is not a function of the digestive system.
Correct Answer:
C
— Regulation of body temperature
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Q. Which of the following is NOT a function of the placenta?
A.
Nutrient transfer
B.
Gas exchange
C.
Hormone production
D.
Fertilization
Show solution
Solution
Fertilization occurs in the fallopian tubes, not in the placenta, which is responsible for nutrient transfer, gas exchange, and hormone production.
Correct Answer:
D
— Fertilization
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Q. Which of the following is NOT a function of the stomach?
A.
Digestion of proteins
B.
Storage of food
C.
Absorption of nutrients
D.
Secretion of gastric acid
Show solution
Solution
The stomach primarily digests proteins and stores food, but it does not absorb nutrients.
Correct Answer:
C
— Absorption of nutrients
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Q. Which of the following is NOT a macronutrient essential for plant growth?
A.
Nitrogen
B.
Phosphorus
C.
Potassium
D.
Iron
Show solution
Solution
Iron is a micronutrient, while nitrogen, phosphorus, and potassium are macronutrients.
Correct Answer:
D
— Iron
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Q. Which of the following is NOT a major group in the plant kingdom?
A.
Bryophytes
B.
Angiosperms
C.
Fungi
D.
Gymnosperms
Show solution
Solution
Fungi are not classified within the plant kingdom; they belong to a separate kingdom.
Correct Answer:
C
— Fungi
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Q. Which of the following is NOT a mechanism of genetic variation in plants?
A.
Mutation
B.
Crossing over
C.
Independent assortment
D.
Asexual reproduction
Show solution
Solution
Asexual reproduction does not introduce genetic variation, as it produces genetically identical offspring, unlike mutation, crossing over, and independent assortment.
Correct Answer:
D
— Asexual reproduction
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Q. Which of the following is NOT a method of asexual reproduction in plants?
A.
Cuttings
B.
Grafting
C.
Seed formation
D.
Layering
Show solution
Solution
Seed formation is a method of sexual reproduction, while cuttings, grafting, and layering are asexual methods.
Correct Answer:
C
— Seed formation
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Q. Which of the following is NOT a method of assisted reproductive technology?
A.
In vitro fertilization
B.
Intracytoplasmic sperm injection
C.
Artificial insemination
D.
Natural conception
Show solution
Solution
Natural conception is not considered a method of assisted reproductive technology, while the others are.
Correct Answer:
D
— Natural conception
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Q. Which of the following is NOT a method of disinfection?
A.
Ultraviolet light
B.
Autoclaving
C.
Chemical disinfectants
D.
Boiling water
Show solution
Solution
Autoclaving is a method of sterilization, not disinfection, as it kills all microorganisms including spores.
Correct Answer:
B
— Autoclaving
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Q. Which of the following is NOT a method of plant biotechnology?
A.
Gene cloning
B.
Tissue culture
C.
Traditional breeding
D.
DNA sequencing
Show solution
Solution
Traditional breeding is not considered a method of plant biotechnology, as it does not involve modern genetic manipulation techniques.
Correct Answer:
C
— Traditional breeding
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Q. Which of the following is NOT a method of plant genetic modification?
A.
Gene editing
B.
Selective breeding
C.
Gene silencing
D.
Transgenic technology
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Solution
Selective breeding is a traditional method and not a direct genetic modification technique like gene editing or transgenic technology.
Correct Answer:
B
— Selective breeding
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Q. Which of the following is NOT a method of plant genetic transformation?
A.
Agrobacterium-mediated transformation
B.
Electroporation
C.
Microinjection
D.
Photosynthesis
Show solution
Solution
Photosynthesis is a natural process for energy conversion in plants and is not a method of genetic transformation.
Correct Answer:
D
— Photosynthesis
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Q. Which of the following is NOT a method of plant reproduction?
A.
Asexual reproduction
B.
Sexual reproduction
C.
Vegetative propagation
D.
Photosynthesis
Show solution
Solution
Photosynthesis is a process for energy production, not a method of reproduction in plants.
Correct Answer:
D
— Photosynthesis
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Q. Which of the following is NOT a method of seed dispersal?
A.
Wind
B.
Water
C.
Animal ingestion
D.
Photosynthesis
Show solution
Solution
Photosynthesis is not a method of seed dispersal; it is the process by which plants convert light energy into chemical energy.
Correct Answer:
D
— Photosynthesis
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Q. Which of the following is NOT a method of sterilization?
A.
Filtration
B.
Radiation
C.
Boiling water
D.
Autoclaving
Show solution
Solution
Boiling water is not a reliable method of sterilization as it does not kill all spores and certain resistant pathogens.
Correct Answer:
C
— Boiling water
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Q. Which of the following is NOT a method of vegetative propagation?
A.
Cuttings
B.
Layering
C.
Grafting
D.
Cross-pollination
Show solution
Solution
Cross-pollination is a method of sexual reproduction, not vegetative propagation, which involves the asexual reproduction of plants.
Correct Answer:
D
— Cross-pollination
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Q. Which of the following is NOT a part of the human digestive tract?
A.
Esophagus
B.
Stomach
C.
Pancreas
D.
Large intestine
Show solution
Solution
The pancreas is an accessory organ and is not part of the digestive tract itself.
Correct Answer:
C
— Pancreas
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Q. Which of the following is NOT a phase of plant growth?
A.
Maturation
B.
Germination
C.
Juvenile
D.
Reproductive
Show solution
Solution
Maturation is not a recognized phase of plant growth; the main phases are germination, juvenile, and reproductive.
Correct Answer:
A
— Maturation
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Q. Which of the following is NOT a product of the light reactions?
A.
ATP
B.
NADPH
C.
Glucose
D.
Oxygen
Show solution
Solution
Glucose is not produced during the light reactions; it is synthesized in the Calvin cycle.
Correct Answer:
C
— Glucose
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Q. Which of the following is NOT a product of the light-dependent reactions?
A.
ATP
B.
NADPH
C.
Oxygen
D.
Glucose
Show solution
Solution
Glucose is not produced in the light-dependent reactions; it is produced in the Calvin cycle.
Correct Answer:
D
— Glucose
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Q. Which of the following is NOT a stage of photosynthesis?
A.
Light-dependent reactions
B.
Calvin cycle
C.
Krebs cycle
D.
Light-independent reactions
Show solution
Solution
The Krebs cycle is part of cellular respiration, not photosynthesis.
Correct Answer:
C
— Krebs cycle
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Q. Which of the following is NOT a type of meristematic tissue?
A.
Apical meristem
B.
Lateral meristem
C.
Intercalary meristem
D.
Cork cambium
Show solution
Solution
Cork cambium is a type of lateral meristem, but it is not classified as a meristematic tissue in the same sense as apical, lateral, and intercalary meristems.
Correct Answer:
D
— Cork cambium
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Q. Which of the following is NOT a type of plant tissue?
A.
Meristematic
B.
Vascular
C.
Dermal
D.
Epithelial
Show solution
Solution
Epithelial tissue is not a type of plant tissue; it is found in animals.
Correct Answer:
D
— Epithelial
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Q. Which of the following is the correct order of taxonomic ranks from broadest to most specific?
A.
Kingdom, Class, Order, Family
B.
Kingdom, Phylum, Class, Order
C.
Phylum, Class, Order, Family
D.
Class, Order, Family, Genus
Show solution
Solution
The correct order of taxonomic ranks from broadest to most specific is Kingdom, Phylum, Class, Order.
Correct Answer:
B
— Kingdom, Phylum, Class, Order
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Q. Which of the following is the largest group of flowering plants?
A.
Monocots
B.
Dicots
C.
Gymnosperms
D.
Ferns
Show solution
Solution
Monocots are the largest group of flowering plants.
Correct Answer:
A
— Monocots
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Q. Which of the following methods is most effective for sterilizing heat-sensitive instruments?
A.
Autoclaving
B.
Ethylene oxide gas
C.
Dry heat sterilization
D.
Chemical disinfection
Show solution
Solution
Ethylene oxide gas is effective for sterilizing heat-sensitive instruments as it can penetrate materials without causing damage.
Correct Answer:
B
— Ethylene oxide gas
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Q. Which of the following methods is NOT considered a form of sterilization?
A.
Autoclaving
B.
Dry heat sterilization
C.
Chemical disinfection
D.
Filtration
Show solution
Solution
Chemical disinfection is a method used to reduce microbial load but does not guarantee the elimination of all microorganisms, thus it is not considered sterilization.
Correct Answer:
C
— Chemical disinfection
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Q. Which of the following methods is NOT typically used for sterilization?
A.
Autoclaving
B.
Dry heat
C.
Chemical disinfection
D.
Filtration
Show solution
Solution
Chemical disinfection is used to reduce microbial load but does not guarantee the elimination of all microorganisms, thus it is not a sterilization method.
Correct Answer:
C
— Chemical disinfection
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Q. Which of the following microbes is commonly used in the production of yogurt?
A.
Lactobacillus
B.
Escherichia coli
C.
Bacillus subtilis
D.
Saccharomyces cerevisiae
Show solution
Solution
Lactobacillus is a genus of bacteria that ferments lactose to produce lactic acid, which is essential in yogurt production.
Correct Answer:
A
— Lactobacillus
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Q. Which of the following microbes is essential for the fermentation process in bread making?
A.
Yeast
B.
Mold
C.
Bacteria
D.
Virus
Show solution
Solution
Yeast, particularly Saccharomyces cerevisiae, ferments sugars to produce carbon dioxide, causing the bread to rise.
Correct Answer:
A
— Yeast
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