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 a key feature of monocots?
A.
Two cotyledons
B.
Parallel leaf venation
C.
Vascular bundles in a ring
D.
Taproot system
Show solution
Solution
Monocots are characterized by having parallel leaf venation and one cotyledon.
Correct Answer:
B
— Parallel leaf venation
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Q. Which of the following is a key feature of the phylum Chordata?
A.
Notochord
B.
Exoskeleton
C.
Radula
D.
Tentacles
Show solution
Solution
The presence of a notochord is a defining characteristic of the phylum Chordata, which includes vertebrates.
Correct Answer:
A
— Notochord
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Q. Which of the following is a key feature of the plant kingdom's classification?
A.
Presence of chlorophyll
B.
Ability to reproduce sexually
C.
Formation of seeds
D.
Presence of vascular tissue
Show solution
Solution
The presence of chlorophyll is a key feature that distinguishes plants from other kingdoms, allowing them to perform photosynthesis.
Correct Answer:
A
— Presence of chlorophyll
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Q. Which of the following is a limitation of using alcohol as a disinfectant?
A.
It is effective against all pathogens
B.
It evaporates quickly
C.
It requires a specific concentration for effectiveness
D.
It is non-toxic
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Solution
Alcohol requires a specific concentration (usually 60-90%) to be effective against microorganisms.
Correct Answer:
C
— It requires a specific concentration for effectiveness
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Q. Which of the following is a limitation of using bleach as a disinfectant?
A.
It is ineffective against viruses
B.
It can corrode surfaces
C.
It is too expensive
D.
It requires a long contact time
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Solution
Bleach can corrode surfaces, which limits its use in certain environments despite its effectiveness against a wide range of pathogens.
Correct Answer:
B
— It can corrode surfaces
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Q. Which of the following is a limitation of using ethylene oxide for sterilization?
A.
It is effective against spores
B.
It requires long exposure times
C.
It is non-toxic
D.
It can be used for heat-sensitive items
Show solution
Solution
Ethylene oxide requires long exposure times to achieve sterilization, which can be a limitation in clinical settings.
Correct Answer:
B
— It requires long exposure times
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Q. Which of the following is a limitation of using steam sterilization?
A.
It is effective against all microorganisms
B.
It requires specific temperature and pressure
C.
It is safe for all materials
D.
It is a quick process
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Solution
Steam sterilization requires specific temperature and pressure conditions to be effective, which can limit its use.
Correct Answer:
B
— It requires specific temperature and pressure
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Q. Which of the following is a major factor driving plant evolution in response to climate change?
A.
Soil composition
B.
Pollinator availability
C.
Temperature and precipitation changes
D.
Pest resistance
Show solution
Solution
Temperature and precipitation changes are major factors driving plant evolution as they directly affect plant survival and distribution.
Correct Answer:
C
— Temperature and precipitation changes
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Q. Which of the following is a method of asexual reproduction in plants?
A.
Pollination
B.
Budding
C.
Fertilization
D.
Seed dispersal
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Solution
Budding is a form of asexual reproduction where a new organism develops from an outgrowth.
Correct Answer:
B
— Budding
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Q. Which of the following is a method of asexual reproduction?
A.
Budding
B.
Fertilization
C.
Internal fertilization
D.
External fertilization
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Solution
Budding is a form of asexual reproduction where a new organism develops from an outgrowth of the parent.
Correct Answer:
A
— Budding
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Q. Which of the following is a method of biocontrol using microbes?
A.
Using chemical pesticides
B.
Introducing beneficial nematodes
C.
Applying synthetic fertilizers
D.
Utilizing Bacillus thuringiensis
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Solution
Bacillus thuringiensis is a bacterium used as a biocontrol agent to target specific insect pests.
Correct Answer:
D
— Utilizing Bacillus thuringiensis
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Q. Which of the following is a method of disinfection that uses high-energy radiation?
A.
Chemical disinfection
B.
Ultraviolet light
C.
Autoclaving
D.
Boiling
Show solution
Solution
Ultraviolet light is a method of disinfection that uses high-energy radiation to kill or inactivate microorganisms.
Correct Answer:
B
— Ultraviolet light
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Q. Which of the following is a method of plant reproduction?
A.
Photosynthesis
B.
Pollination
C.
Transpiration
D.
Germination
Show solution
Solution
Pollination is a method of plant reproduction that involves the transfer of pollen from male to female reproductive structures.
Correct Answer:
B
— Pollination
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Q. Which of the following is a method of seedless reproduction in plants?
A.
Fertilization
B.
Grafting
C.
Cross-pollination
D.
Seed germination
Show solution
Solution
Grafting is a method of asexual reproduction that does not involve seeds, allowing for the propagation of specific plant varieties.
Correct Answer:
B
— Grafting
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Q. Which of the following is a method of sterilization that uses dry heat?
A.
Autoclaving
B.
Incineration
C.
Pasteurization
D.
Filtration
Show solution
Solution
Incineration is a method of sterilization that uses dry heat to destroy microorganisms.
Correct Answer:
B
— Incineration
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Q. Which of the following is a method of sterilization that uses high-pressure steam?
A.
Dry heat sterilization
B.
Chemical vapor sterilization
C.
Autoclaving
D.
Radiation sterilization
Show solution
Solution
Autoclaving is a method of sterilization that uses high-pressure steam to kill all forms of microbial life.
Correct Answer:
C
— Autoclaving
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Q. Which of the following is a physical method of sterilization?
A.
Ethylene oxide gas
B.
Autoclaving
C.
Chlorine bleach
D.
Hydrogen peroxide
Show solution
Solution
Autoclaving is a physical method of sterilization that uses steam under pressure.
Correct Answer:
B
— Autoclaving
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Q. Which of the following is a potential application of stem cell therapy?
A.
Regenerating damaged tissues
B.
Producing vaccines
C.
Gene editing
D.
Creating transgenic animals
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Solution
Stem cell therapy has the potential to regenerate damaged tissues and treat various diseases.
Correct Answer:
A
— Regenerating damaged tissues
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Q. Which of the following is a potential risk associated with genetically modified plants?
A.
Increased biodiversity
B.
Unintended effects on non-target species
C.
Improved crop resilience
D.
Enhanced nutritional value
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Solution
One potential risk of genetically modified plants is the unintended effects they may have on non-target species in the ecosystem.
Correct Answer:
B
— Unintended effects on non-target species
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Q. Which of the following is a potential risk of genetically modified organisms (GMOs)?
A.
Increased crop yields
B.
Reduced pesticide use
C.
Unintended effects on non-target species
D.
Enhanced nutritional content
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Solution
One potential risk of GMOs is the unintended effects they may have on non-target species in the ecosystem.
Correct Answer:
C
— Unintended effects on non-target species
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Q. Which of the following is a primary function of the skeletal system?
A.
Production of hormones
B.
Support and protection
C.
Digestion of food
D.
Respiration
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Solution
The primary function of the skeletal system is to provide support and protection for the body's organs and tissues.
Correct Answer:
B
— Support and protection
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Q. Which of the following is a product of the Calvin cycle?
A.
ATP
B.
NADPH
C.
Glucose
D.
Oxygen
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Solution
The Calvin cycle produces glucose as a product of carbon fixation.
Correct Answer:
C
— Glucose
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Q. Which of the following is a product of the dark reactions?
A.
Oxygen
B.
ATP
C.
Glucose
D.
NADPH
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Solution
Glucose is a product of the dark reactions (Calvin cycle) where carbon fixation occurs.
Correct Answer:
C
— Glucose
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Q. Which of the following is a product of the light reactions that is used in the Calvin cycle?
A.
Oxygen
B.
Glucose
C.
NADPH
D.
Carbon dioxide
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Solution
NADPH is a product of the light reactions that is used in the Calvin cycle.
Correct Answer:
C
— NADPH
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Q. Which of the following is a product of the light-dependent reactions that is used in the Calvin cycle?
A.
Oxygen
B.
NADPH
C.
Glucose
D.
RuBP
Show solution
Solution
NADPH is a product of the light-dependent reactions that is used in the Calvin cycle.
Correct Answer:
B
— NADPH
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Q. Which of the following is a real-world application of understanding photosynthesis?
A.
Improving crop yields
B.
Developing new pigments
C.
Creating artificial light sources
D.
Enhancing soil quality
Show solution
Solution
Understanding photosynthesis can lead to methods for improving crop yields through better light utilization.
Correct Answer:
A
— Improving crop yields
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Q. Which of the following is a technique used to amplify DNA?
A.
Gel electrophoresis
B.
Polymerase chain reaction (PCR)
C.
Southern blotting
D.
Sanger sequencing
Show solution
Solution
Polymerase chain reaction (PCR) is a widely used technique to amplify specific DNA sequences.
Correct Answer:
B
— Polymerase chain reaction (PCR)
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Q. Which of the following is a type of genetic variation that can occur in plants?
A.
Mutation
B.
Transcription
C.
Translation
D.
Replication
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Solution
Mutation is a change in the DNA sequence that can lead to genetic variation in plants.
Correct Answer:
A
— Mutation
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Q. Which of the following is a type of RNA that carries genetic information from DNA to the ribosome?
A.
tRNA
B.
mRNA
C.
rRNA
D.
snRNA
Show solution
Solution
mRNA (messenger RNA) carries genetic information from DNA to the ribosome for protein synthesis.
Correct Answer:
B
— mRNA
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Q. Which of the following is an example of a mutation?
A.
Color blindness
B.
Height variation
C.
Blood type
D.
All of the above
Show solution
Solution
All of the options represent traits that can arise from mutations in genes.
Correct Answer:
D
— All of the above
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