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. Which microbe is known for producing the antibiotic penicillin?
A.
Bacillus cereus
B.
Penicillium chrysogenum
C.
Streptomyces griseus
D.
Escherichia coli
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Solution
Penicillium chrysogenum is the mold from which the antibiotic penicillin is derived, used to treat bacterial infections.
Correct Answer:
B
— Penicillium chrysogenum
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Q. Which microbe is primarily responsible for the fermentation of bread?
A.
Lactobacillus
B.
Saccharomyces cerevisiae
C.
Aspergillus niger
D.
Clostridium botulinum
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Solution
Saccharomyces cerevisiae, or baker's yeast, is responsible for the fermentation process in bread making.
Correct Answer:
B
— Saccharomyces cerevisiae
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Q. Which microbe is primarily responsible for the fermentation of sauerkraut?
A.
Lactobacillus
B.
Bacillus
C.
Clostridium
D.
Staphylococcus
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Solution
Lactobacillus species are key players in the fermentation process of sauerkraut, converting sugars into lactic acid.
Correct Answer:
A
— Lactobacillus
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Q. Which microbe is primarily responsible for the fermentation process in bread making?
A.
Lactobacillus
B.
Saccharomyces cerevisiae
C.
Rhizobium
D.
Clostridium
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Solution
Saccharomyces cerevisiae, or baker's yeast, ferments sugars to produce carbon dioxide and alcohol, causing bread to rise.
Correct Answer:
B
— Saccharomyces cerevisiae
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Q. Which microbe is used in the production of vinegar?
A.
Lactobacillus
B.
Acetobacter
C.
Saccharomyces
D.
Bacillus
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Solution
Acetobacter is a genus of bacteria that converts ethanol into acetic acid, the main component of vinegar.
Correct Answer:
B
— Acetobacter
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Q. Which molecule acts as an electron carrier in the light reactions?
A.
ATP
B.
NADPH
C.
FADH2
D.
RuBP
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Solution
NADPH acts as an electron carrier in the light reactions.
Correct Answer:
B
— NADPH
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Q. Which molecule acts as the electron carrier in the light reactions?
A.
NADP+
B.
FADH2
C.
ATP
D.
RuBP
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Solution
NADP+ acts as the electron carrier, becoming NADPH after accepting electrons.
Correct Answer:
A
— NADP+
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Q. Which molecule acts as the primary electron carrier in the light reactions?
A.
NADP+
B.
FADH2
C.
ATP
D.
ADP
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Solution
NADP+ acts as the primary electron carrier, becoming NADPH after accepting electrons.
Correct Answer:
A
— NADP+
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Q. Which molecule acts as the primary electron donor in the light reactions?
A.
Water
B.
NADP+
C.
Glucose
D.
RuBP
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Solution
Water acts as the primary electron donor in the light reactions, providing electrons.
Correct Answer:
A
— Water
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Q. Which molecule acts as the primary energy carrier in the dark reactions?
A.
ATP
B.
NADPH
C.
Glucose
D.
RuBP
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Solution
ATP is the primary energy carrier used in the dark reactions (Calvin cycle).
Correct Answer:
A
— ATP
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Q. Which molecule acts as the primary energy carrier in the light reactions?
A.
ATP
B.
NADPH
C.
Glucose
D.
RuBP
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Solution
ATP is the primary energy carrier produced during the light reactions.
Correct Answer:
A
— ATP
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Q. Which molecule is produced as a byproduct of the light reactions?
A.
Glucose
B.
Oxygen
C.
NADPH
D.
ATP
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Solution
Oxygen is released as a byproduct during the light reactions of photosynthesis.
Correct Answer:
B
— Oxygen
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Q. Which molecule is produced as a byproduct of the light-dependent reactions?
A.
Glucose
B.
Oxygen
C.
NADPH
D.
ATP
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Solution
Oxygen is produced as a byproduct of the light-dependent reactions when water molecules are split.
Correct Answer:
B
— Oxygen
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Q. Which molecule is produced during the Calvin cycle in the dark reactions?
A.
NADPH
B.
ATP
C.
Glucose
D.
Oxygen
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Solution
Glucose is produced during the Calvin cycle, which is part of the dark reactions.
Correct Answer:
C
— Glucose
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Q. Which molecule is produced during the light reactions and used in the Calvin cycle?
A.
Oxygen
B.
Glucose
C.
NADPH
D.
Carbon dioxide
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Solution
NADPH is produced during the light reactions and is used in the Calvin cycle for carbon fixation.
Correct Answer:
C
— NADPH
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Q. Which of the following adaptations is crucial for the survival of plants in arid environments?
A.
Broad leaves
B.
Deep roots
C.
High water content
D.
Thick cuticles
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Solution
Thick cuticles help reduce water loss, making them crucial for survival in arid environments.
Correct Answer:
D
— Thick cuticles
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Q. Which of the following adaptations is NOT typically associated with the evolution of desert plants?
A.
Thick cuticles
B.
Deep root systems
C.
Broad leaves
D.
Water storage tissues
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Solution
Broad leaves are not typically associated with desert plants, which usually have adaptations like thick cuticles and water storage tissues to conserve moisture.
Correct Answer:
C
— Broad leaves
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Q. Which of the following best describes a recessive allele?
A.
It is always expressed in the phenotype
B.
It can only be expressed in a homozygous condition
C.
It is more common than dominant alleles
D.
It masks the effect of dominant alleles
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Solution
A recessive allele is only expressed in the phenotype when an individual has two copies of that allele (homozygous condition).
Correct Answer:
B
— It can only be expressed in a homozygous condition
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Q. Which of the following best describes the concept of convergent evolution in plants?
A.
Different species evolve similar traits due to similar environments
B.
Species evolve different traits due to different environments
C.
Species become extinct due to lack of adaptation
D.
Species evolve through hybridization
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Solution
Convergent evolution occurs when different species evolve similar traits due to adapting to similar environmental pressures.
Correct Answer:
A
— Different species evolve similar traits due to similar environments
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Q. Which of the following best describes the term 'genotype'?
A.
The physical appearance of an organism
B.
The genetic constitution of an organism
C.
The environmental factors affecting a plant
D.
The evolutionary history of a species
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Solution
Genotype refers to the genetic constitution of an organism, which determines its potential traits.
Correct Answer:
B
— The genetic constitution of an organism
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Q. Which of the following factors can affect the rate of photosynthesis?
A.
Light intensity
B.
Carbon dioxide concentration
C.
Temperature
D.
All of the above
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Solution
All of the above factors can affect the rate of photosynthesis.
Correct Answer:
D
— All of the above
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Q. Which of the following factors can affect the rate of respiration in plants?
A.
Temperature
B.
Light intensity
C.
Soil moisture
D.
All of the above
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Solution
All of the above factors can affect the rate of respiration in plants, influencing their metabolic processes.
Correct Answer:
D
— All of the above
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Q. Which of the following factors can limit the rate of photosynthesis?
A.
Light intensity
B.
Carbon dioxide concentration
C.
Temperature
D.
All of the above
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Solution
All of the above factors can limit the rate of photosynthesis.
Correct Answer:
D
— All of the above
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Q. Which of the following factors does NOT affect the rate of photosynthesis?
A.
Light intensity
B.
Temperature
C.
Soil pH
D.
Carbon dioxide concentration
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Solution
Soil pH does not directly affect the rate of photosynthesis, unlike the other factors.
Correct Answer:
C
— Soil pH
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Q. Which of the following groups of plants is classified as non-vascular?
A.
Mosses
B.
Ferns
C.
Conifers
D.
Flowering plants
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Solution
Mosses are classified as non-vascular plants because they lack specialized tissues for water and nutrient transport.
Correct Answer:
A
— Mosses
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Q. Which of the following is a benefit of asexual reproduction in plants?
A.
Increased genetic diversity
B.
Faster population growth
C.
Dependency on pollinators
D.
Formation of seeds
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Solution
Asexual reproduction allows for faster population growth since it does not require the time and resources needed for sexual reproduction.
Correct Answer:
B
— Faster population growth
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Q. Which of the following is a benefit of plant classification in agriculture?
A.
Improved pest control
B.
Increased soil erosion
C.
Higher water consumption
D.
Reduced biodiversity
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Solution
Classifying plants allows for better pest control strategies by identifying resistant varieties.
Correct Answer:
A
— Improved pest control
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Q. Which of the following is a benefit of using composting in agriculture?
A.
It increases soil erosion
B.
It reduces soil fertility
C.
It enhances soil microbial diversity
D.
It requires chemical additives
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Solution
Composting enriches soil with organic matter and enhances microbial diversity, improving soil health.
Correct Answer:
C
— It enhances soil microbial diversity
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Q. Which of the following is a benefit of using genetically modified organisms (GMOs) in agriculture?
A.
Increased pesticide use
B.
Higher crop yields
C.
Reduced biodiversity
D.
Longer growing seasons
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Solution
GMOs can lead to higher crop yields by enhancing resistance to pests and diseases.
Correct Answer:
B
— Higher crop yields
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Q. Which of the following is a benefit of using genetically modified organisms (GMOs) in plant reproduction?
A.
Increased genetic diversity
B.
Enhanced resistance to pests and diseases
C.
Slower growth rates
D.
Reduced crop yields
Show solution
Solution
GMOs can be engineered to have enhanced traits, such as pest resistance, which can lead to higher crop yields and reduced reliance on chemical pesticides.
Correct Answer:
B
— Enhanced resistance to pests and diseases
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