Botany is the branch of Biology that focuses on the study of plants , their structure, functions, growth, reproduction, and role in the environment. This category is curated for school students (Classes 6–12) and undergraduate learners to build strong fundamentals with exam-focused clarity.
In this section, you’ll explore:
Plant morphology, anatomy, and physiology explained step-by-step
Reproduction in plants , development, and life cycles
Cell biology, genetics, and biotechnology concepts related to plants
Ecology and plant diversity with real-world relevance
Important questions, MCQs, diagrams, and revision notes for exams
The content is aligned with NCERT , school boards, and UG syllabi , making it highly useful for school exams, NEET preparation, and college assessments . Concepts are explained in simple language with a focus on understanding, not rote learning.
Build a strong foundation in plant sciences and master Botany with confidence.
Q. What is the role of cytokinins in plant growth?
A.
Promote root growth
B.
Stimulate cell division
C.
Inhibit leaf senescence
D.
All of the above
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Solution
Cytokinins stimulate cell division, promote root growth, and inhibit leaf senescence.
Correct Answer:
D
— All of the above
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Q. What is the role of essential oils derived from plants in human health?
A.
Photosynthesis
B.
Antimicrobial properties
C.
Water absorption
D.
Nutrient storage
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Solution
Essential oils from plants often possess antimicrobial properties, making them useful in health and wellness.
Correct Answer:
B
— Antimicrobial properties
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Q. What is the role of essential oils in plants that can also benefit human health?
A.
Photosynthesis
B.
Defense against pests
C.
Water absorption
D.
Nutrient storage
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Solution
Essential oils help plants defend against pests and can have therapeutic effects in humans.
Correct Answer:
B
— Defense against pests
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Q. What is the role of essential oils in plants that can also have therapeutic effects on humans?
A.
Photosynthesis
B.
Defense mechanisms
C.
Water storage
D.
Nutrient absorption
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Solution
Essential oils help protect plants from pests and diseases, and can have therapeutic effects when used in aromatherapy.
Correct Answer:
B
— Defense mechanisms
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Q. What is the role of essential oils in plants?
A.
Photosynthesis
B.
Defense against herbivores
C.
Water storage
D.
Nutrient absorption
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Solution
Essential oils serve as a defense mechanism against herbivores and pathogens.
Correct Answer:
B
— Defense against herbivores
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Q. What is the role of histones in plant cells?
A.
Energy production
B.
DNA packaging
C.
Photosynthesis
D.
Cell division
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Solution
Histones are proteins that help package DNA into a compact, organized structure called chromatin.
Correct Answer:
B
— DNA packaging
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Q. What is the role of mitochondria in plant cells?
A.
Photosynthesis
B.
Energy production
C.
Water storage
D.
Nutrient absorption
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Solution
Mitochondria are known as the powerhouses of the cell, where energy production through respiration occurs.
Correct Answer:
B
— Energy production
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Q. What is the role of monoclonal antibodies in biotechnology?
A.
To enhance photosynthesis
B.
To target specific cells in therapy
C.
To produce insulin
D.
To modify genetic sequences
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Solution
Monoclonal antibodies are designed to target specific cells, making them useful in therapies and diagnostics.
Correct Answer:
B
— To target specific cells in therapy
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Q. What is the role of mutations in plant evolution?
A.
They are harmful and should be avoided
B.
They provide raw material for evolution
C.
They have no role in evolution
D.
They only occur in animals
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Solution
Mutations provide the raw material for evolution by introducing new genetic variations into a population.
Correct Answer:
B
— They provide raw material for evolution
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Q. What is the role of mycorrhizae in plant ecology?
A.
Water storage
B.
Nutrient absorption
C.
Photosynthesis
D.
Seed dispersal
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Solution
Mycorrhizae enhance nutrient absorption for plants, particularly phosphorus.
Correct Answer:
B
— Nutrient absorption
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Q. What is the role of mycorrhizae in plant growth?
A.
Water storage
B.
Nutrient absorption
C.
Photosynthesis
D.
Gas exchange
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Solution
Mycorrhizae enhance nutrient absorption, particularly phosphorus, from the soil.
Correct Answer:
B
— Nutrient absorption
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Q. What is the role of mycorrhizal fungi in plant growth?
A.
Photosynthesis
B.
Nutrient absorption
C.
Water storage
D.
Pollination
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Solution
Mycorrhizal fungi enhance nutrient absorption, particularly phosphorus, for plants.
Correct Answer:
B
— Nutrient absorption
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Q. What is the role of NADPH in photosynthesis?
A.
Energy storage
B.
Electron transport
C.
Carbon fixation
D.
Light absorption
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Solution
NADPH serves as an electron carrier in the light-independent reactions of photosynthesis.
Correct Answer:
B
— Electron transport
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Q. What is the role of phloem in plants?
A.
Transport of water
B.
Transport of sugars
C.
Support and structure
D.
Storage of nutrients
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Solution
Phloem is responsible for the transport of sugars and other metabolic products downward from the leaves.
Correct Answer:
B
— Transport of sugars
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Q. What is the role of phytochemicals in human health?
A.
Provide energy
B.
Enhance flavor
C.
Prevent disease
D.
Increase growth rate
Show solution
Solution
Phytochemicals are compounds in plants that can help prevent diseases.
Correct Answer:
C
— Prevent disease
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Q. What is the role of phytosterols found in plants regarding human health?
A.
Increase cholesterol levels
B.
Lower cholesterol levels
C.
Enhance flavor
D.
Promote growth
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Solution
Phytosterols can help lower cholesterol levels in humans by blocking the absorption of cholesterol in the intestines.
Correct Answer:
B
— Lower cholesterol levels
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Q. What is the role of phytosterols in human health?
A.
Increase blood sugar
B.
Lower cholesterol
C.
Enhance digestion
D.
Boost immunity
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Solution
Phytosterols are known to lower cholesterol levels in the body.
Correct Answer:
B
— Lower cholesterol
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Q. What is the role of pollinators in plant reproduction?
A.
To provide water to the plants
B.
To assist in seed dispersal
C.
To transfer pollen from male to female structures
D.
To enhance photosynthesis
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Solution
Pollinators transfer pollen from the male anthers to the female stigma, facilitating fertilization.
Correct Answer:
C
— To transfer pollen from male to female structures
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Q. What is the role of pollinators in the evolution of flowering plants?
A.
They reduce genetic diversity
B.
They facilitate cross-pollination
C.
They increase competition
D.
They have no role
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Solution
Pollinators facilitate cross-pollination, which enhances genetic diversity and can lead to evolutionary adaptations in flowering plants.
Correct Answer:
B
— They facilitate cross-pollination
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Q. What is the role of Rhizobium bacteria in legume plants?
A.
Decomposing organic matter
B.
Fixing atmospheric nitrogen
C.
Promoting root growth
D.
Producing secondary metabolites
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Solution
Rhizobium bacteria form nodules on legume roots and fix atmospheric nitrogen, benefiting the plant.
Correct Answer:
B
— Fixing atmospheric nitrogen
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Q. What is the role of Rhizobium in legume plants?
A.
Decomposing organic matter
B.
Fixing atmospheric nitrogen
C.
Promoting root growth
D.
Enhancing photosynthesis
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Solution
Rhizobium bacteria form nodules on legume roots and fix atmospheric nitrogen, benefiting the plant.
Correct Answer:
B
— Fixing atmospheric nitrogen
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Q. What is the role of Rhizobium in plant ecology?
A.
Decomposing organic matter
B.
Forming symbiotic relationships with legumes
C.
Causing plant diseases
D.
Producing antibiotics
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Solution
Rhizobium bacteria form symbiotic relationships with legume roots, fixing nitrogen and improving soil fertility.
Correct Answer:
B
— Forming symbiotic relationships with legumes
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Q. What is the role of ribosomes in plant cells?
A.
Energy production
B.
Photosynthesis
C.
Protein synthesis
D.
Cell division
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Solution
Ribosomes are responsible for synthesizing proteins by translating messenger RNA.
Correct Answer:
C
— Protein synthesis
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Q. What is the role of RNA in protein synthesis in plants?
A.
Energy carrier
B.
Genetic material
C.
Messenger and translator
D.
Structural component
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Solution
RNA acts as a messenger (mRNA) and translator (tRNA) in the process of protein synthesis.
Correct Answer:
C
— Messenger and translator
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Q. What is the role of RuBisCO in photosynthesis?
A.
To absorb light
B.
To fix carbon dioxide
C.
To produce ATP
D.
To transport electrons
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Solution
RuBisCO is the enzyme that catalyzes the fixation of carbon dioxide in the Calvin cycle.
Correct Answer:
B
— To fix carbon dioxide
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Q. What is the role of RuBisCO in the Calvin cycle?
A.
To produce ATP
B.
To fix carbon dioxide
C.
To generate NADPH
D.
To release oxygen
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Solution
RuBisCO is the enzyme that catalyzes the fixation of carbon dioxide in the Calvin cycle.
Correct Answer:
B
— To fix carbon dioxide
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Q. What is the role of stomata in plant leaves?
A.
Water storage
B.
Gas exchange
C.
Nutrient absorption
D.
Support
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Solution
Stomata are small openings on the leaf surface that allow for gas exchange, including the intake of carbon dioxide and release of oxygen.
Correct Answer:
B
— Gas exchange
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Q. What is the role of stomata in plants?
A.
Water storage
B.
Gas exchange
C.
Nutrient absorption
D.
Photosynthesis
Show solution
Solution
Stomata are small openings that allow for gas exchange, including the intake of carbon dioxide.
Correct Answer:
B
— Gas exchange
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Q. What is the role of the apical meristem in plant growth?
A.
Photosynthesis
B.
Cell division
C.
Water absorption
D.
Nutrient storage
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Solution
The apical meristem is responsible for cell division, leading to primary growth in plants.
Correct Answer:
B
— Cell division
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Q. What is the role of the apical meristem in plants?
A.
Photosynthesis
B.
Cell division and growth
C.
Water absorption
D.
Nutrient storage
Show solution
Solution
The apical meristem is responsible for cell division and growth at the tips of roots and shoots.
Correct Answer:
B
— Cell division and growth
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