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. In which part of the plant does cellular respiration primarily occur?
A.
Roots
B.
Leaves
C.
Stems
D.
All parts
Show solution
Solution
Cellular respiration occurs in all parts of the plant, as all cells require energy to function.
Correct Answer:
D
— All parts
Learn More →
Q. In which part of the plant does fertilization typically occur?
A.
In the roots
B.
In the leaves
C.
In the ovary
D.
In the stem
Show solution
Solution
Fertilization typically occurs in the ovary, where the ovule is located.
Correct Answer:
C
— In the ovary
Learn More →
Q. In which part of the plant does photosynthesis primarily occur?
A.
Roots
B.
Stems
C.
Leaves
D.
Flowers
Show solution
Solution
Photosynthesis primarily occurs in the leaves, where chloroplasts are abundant.
Correct Answer:
C
— Leaves
Learn More →
Q. In which part of the plant does primary growth occur?
A.
Root tips and shoot tips
B.
Leaves
C.
Flowers
D.
Stems
Show solution
Solution
Primary growth occurs at the root tips and shoot tips, where apical meristems are located.
Correct Answer:
A
— Root tips and shoot tips
Learn More →
Q. In which part of the plant does secondary growth primarily occur?
A.
Roots
B.
Leaves
C.
Stems
D.
Flowers
Show solution
Solution
Secondary growth primarily occurs in stems and roots, allowing for an increase in thickness due to the activity of the vascular cambium.
Correct Answer:
C
— Stems
Learn More →
Q. In which part of the plant does the Calvin cycle occur?
A.
Thylakoid membrane
B.
Stroma of the chloroplast
C.
Cytoplasm
D.
Mitochondria
Show solution
Solution
The Calvin cycle occurs in the stroma of the chloroplast, where it uses ATP and NADPH from the light reactions.
Correct Answer:
B
— Stroma of the chloroplast
Learn More →
Q. In which part of the plant does the majority of water absorption occur?
A.
Stems
B.
Leaves
C.
Roots
D.
Flowers
Show solution
Solution
Roots are primarily responsible for the absorption of water and nutrients from the soil.
Correct Answer:
C
— Roots
Learn More →
Q. In which phase of photosynthesis does carbon fixation occur?
A.
Light reactions
B.
Calvin cycle
C.
Photorespiration
D.
Electron transport chain
Show solution
Solution
Carbon fixation occurs during the Calvin cycle.
Correct Answer:
B
— Calvin cycle
Learn More →
Q. In which phase of photosynthesis is ATP synthesized?
A.
Light-dependent reactions
B.
Calvin cycle
C.
Both A and B
D.
None of the above
Show solution
Solution
ATP is synthesized during the light-dependent reactions of photosynthesis.
Correct Answer:
A
— Light-dependent reactions
Learn More →
Q. In which phase of photosynthesis is carbon dioxide utilized?
A.
Light reactions
B.
Calvin cycle
C.
Photorespiration
D.
Electron transport chain
Show solution
Solution
Carbon dioxide is utilized in the Calvin cycle during photosynthesis.
Correct Answer:
B
— Calvin cycle
Learn More →
Q. In which phase of photosynthesis is glucose synthesized?
A.
Light reactions
B.
Calvin cycle
C.
Photorespiration
D.
Electron transport chain
Show solution
Solution
Glucose is synthesized during the Calvin cycle, which occurs in the stroma of chloroplasts.
Correct Answer:
B
— Calvin cycle
Learn More →
Q. In which phase of the cell cycle does DNA replication occur?
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
Show solution
Solution
DNA replication occurs during the S phase of the cell cycle.
Correct Answer:
B
— S phase
Learn More →
Q. In which plant group do you find seeds that are not enclosed in an ovary?
A.
Angiosperms
B.
Gymnosperms
C.
Bryophytes
D.
Pteridophytes
Show solution
Solution
Gymnosperms produce seeds that are exposed on cones, unlike angiosperms which have seeds enclosed in fruits.
Correct Answer:
B
— Gymnosperms
Learn More →
Q. In which plant group do you find the largest diversity of species?
A.
Bryophytes
B.
Angiosperms
C.
Gymnosperms
D.
Pteridophytes
Show solution
Solution
Angiosperms, or flowering plants, represent the largest diversity of species in the plant kingdom.
Correct Answer:
B
— Angiosperms
Learn More →
Q. In which plant group would you find a dominant sporophyte generation?
A.
Bryophytes
B.
Pteridophytes
C.
Gymnosperms
D.
Angiosperms
Show solution
Solution
In Pteridophytes, the sporophyte generation is dominant and is the most visible part of the plant.
Correct Answer:
B
— Pteridophytes
Learn More →
Q. In which plant group would you find a gametophyte that is typically larger and more complex than the sporophyte?
A.
Angiosperms
B.
Gymnosperms
C.
Bryophytes
D.
Pteridophytes
Show solution
Solution
In Bryophytes, the gametophyte is the dominant and more complex stage, while the sporophyte is often dependent on it.
Correct Answer:
C
— Bryophytes
Learn More →
Q. In which plant group would you find a vascular system with xylem and phloem?
A.
Mosses
B.
Ferns
C.
Liverworts
D.
Algae
Show solution
Solution
Ferns possess a vascular system that includes xylem and phloem, allowing for efficient transport of water and nutrients.
Correct Answer:
B
— Ferns
Learn More →
Q. In which scenario would you use a high-level disinfectant?
A.
For cleaning floors
B.
For sterilizing surgical instruments
C.
For disinfecting semi-critical items like endoscopes
D.
For routine hand hygiene
Show solution
Solution
High-level disinfectants are used for semi-critical items that come into contact with mucous membranes, such as endoscopes, where sterilization is not feasible.
Correct Answer:
C
— For disinfecting semi-critical items like endoscopes
Learn More →
Q. In which type of plant reproduction do gametes fuse to form a zygote?
A.
Asexual reproduction
B.
Vegetative propagation
C.
Sexual reproduction
D.
Apomixis
Show solution
Solution
Sexual reproduction involves the fusion of male and female gametes to form a zygote, leading to the development of a new organism.
Correct Answer:
C
— Sexual reproduction
Learn More →
Q. In which type of reproduction do plants produce seeds without fertilization?
A.
Asexual reproduction
B.
Apomixis
C.
Sexual reproduction
D.
Vegetative propagation
Show solution
Solution
Apomixis is a form of asexual reproduction where seeds are produced without fertilization, allowing for the offspring to be genetically identical to the parent.
Correct Answer:
B
— Apomixis
Learn More →
Q. What are the two main stages of photosynthesis?
A.
Light reactions and Calvin cycle
B.
Respiration and Fermentation
C.
Transpiration and Absorption
D.
Glycolysis and Krebs cycle
Show solution
Solution
Photosynthesis consists of light reactions and the Calvin cycle.
Correct Answer:
A
— Light reactions and Calvin cycle
Learn More →
Q. What environmental factor is most critical for seed germination?
A.
Light
B.
Temperature
C.
Soil type
D.
Humidity
Show solution
Solution
Temperature is a critical factor for seed germination, as it affects metabolic processes.
Correct Answer:
B
— Temperature
Learn More →
Q. What gas is primarily consumed during the process of respiration in plants?
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
Show solution
Solution
Oxygen is primarily consumed during respiration, as it is used to oxidize glucose to release energy.
Correct Answer:
A
— Oxygen
Learn More →
Q. What gas is primarily consumed during the respiration process in plants?
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
Show solution
Solution
Oxygen is primarily consumed during respiration, as it is used to oxidize glucose to release energy.
Correct Answer:
A
— Oxygen
Learn More →
Q. What gas is produced as a byproduct of photosynthesis?
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
Show solution
Solution
Oxygen is produced as a byproduct of photosynthesis during the light reactions.
Correct Answer:
A
— Oxygen
Learn More →
A.
A sequence of three nucleotides in DNA
B.
A sequence of three nucleotides in RNA
C.
A type of amino acid
D.
A protein structure
Show solution
Solution
A codon is a sequence of three nucleotides in mRNA that corresponds to a specific amino acid or stop signal during protein synthesis.
Correct Answer:
B
— A sequence of three nucleotides in RNA
Learn More →
Q. What is a common application of CRISPR technology in plants?
A.
Creating clones of plants
B.
Editing specific genes for desired traits
C.
Increasing photosynthesis efficiency
D.
Enhancing seed germination
Show solution
Solution
CRISPR technology allows for precise editing of specific genes to enhance traits such as disease resistance.
Correct Answer:
B
— Editing specific genes for desired traits
Learn More →
Q. What is a common application of gene cloning?
A.
Producing insulin
B.
Creating vaccines
C.
Gene therapy
D.
All of the above
Show solution
Solution
Gene cloning is used in various applications, including producing insulin, creating vaccines, and gene therapy.
Correct Answer:
D
— All of the above
Learn More →
Q. What is a common application of plant tissue culture in biotechnology?
A.
Pest control
B.
Plant breeding
C.
Propagation of disease-free plants
D.
Soil improvement
Show solution
Solution
Plant tissue culture is widely used to propagate disease-free plants, ensuring healthy stock for agriculture.
Correct Answer:
C
— Propagation of disease-free plants
Learn More →
Q. What is a common method for visualizing DNA after gel electrophoresis?
A.
Fluorescent microscopy
B.
Ethidium bromide staining
C.
Western blotting
D.
Southern blotting
Show solution
Solution
Ethidium bromide staining intercalates with DNA and fluoresces under UV light, allowing visualization of DNA bands.
Correct Answer:
B
— Ethidium bromide staining
Learn More →
Showing 181 to 210 of 1731 (58 Pages)