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 type of RNA carries amino acids to the ribosome?
A.
mRNA
B.
tRNA
C.
rRNA
D.
snRNA
Show solution
Solution
Transfer RNA (tRNA) carries amino acids to the ribosome during protein synthesis.
Correct Answer:
B
— tRNA
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Q. Which type of RNA carries the genetic code from DNA to the ribosome?
A.
rRNA
B.
tRNA
C.
mRNA
D.
snRNA
Show solution
Solution
mRNA (messenger RNA) is responsible for carrying the genetic code from the DNA in the nucleus to the ribosome in the cytoplasm.
Correct Answer:
C
— mRNA
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Q. Which type of RNA is involved in bringing amino acids to the ribosome during translation?
A.
mRNA
B.
tRNA
C.
rRNA
D.
snRNA
Show solution
Solution
Transfer RNA (tRNA) is responsible for bringing amino acids to the ribosome during the translation process.
Correct Answer:
B
— tRNA
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Q. Which type of RNA is responsible for bringing amino acids to the ribosome during protein synthesis?
A.
mRNA
B.
tRNA
C.
rRNA
D.
snRNA
Show solution
Solution
Transfer RNA (tRNA) is responsible for bringing the appropriate amino acids to the ribosome during protein synthesis.
Correct Answer:
B
— tRNA
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Q. Which type of sclerenchyma cells are typically found in seed coats and nutshells?
A.
Fibers
B.
Sclereids
C.
Parenchyma
D.
Collenchyma
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Solution
Fibers are long, slender sclerenchyma cells that provide structural support, while sclereids are shorter and contribute to hardness in seed coats and nutshells.
Correct Answer:
B
— Sclereids
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Q. Which type of symmetry is exhibited by most animals in the phylum Chordata?
A.
Radial symmetry
B.
Bilateral symmetry
C.
Asymmetry
D.
Spherical symmetry
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Solution
Most animals in the phylum Chordata exhibit bilateral symmetry, meaning their body can be divided into two mirror-image halves.
Correct Answer:
B
— Bilateral symmetry
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Q. Which type of T cell is primarily responsible for the direct killing of infected host cells?
A.
Helper T cells
B.
Cytotoxic T cells
C.
Regulatory T cells
D.
Memory T cells
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Solution
Cytotoxic T cells (CD8+ T cells) are responsible for directly killing infected cells by recognizing antigens presented by MHC class I molecules.
Correct Answer:
B
— Cytotoxic T cells
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Q. Which type of tissue is primarily involved in photosynthesis?
A.
Meristematic tissue
B.
Ground tissue
C.
Vascular tissue
D.
Dermal tissue
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Solution
Ground tissue, particularly parenchyma cells containing chloroplasts, is primarily involved in photosynthesis.
Correct Answer:
B
— Ground tissue
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Q. Which type of transport requires energy to move substances against their concentration gradient?
A.
Passive transport
B.
Facilitated diffusion
C.
Active transport
D.
Osmosis
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Solution
Active transport requires energy to move substances against their concentration gradient.
Correct Answer:
C
— Active transport
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Q. Which type of vaccine contains live attenuated pathogens?
A.
Inactivated vaccine
B.
Subunit vaccine
C.
Recombinant vaccine
D.
Live attenuated vaccine
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Solution
Live attenuated vaccines contain weakened forms of the pathogen that can still elicit an immune response without causing disease.
Correct Answer:
D
— Live attenuated vaccine
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Q. Which type of vaccine is composed of live attenuated pathogens?
A.
Inactivated vaccine
B.
Subunit vaccine
C.
Recombinant vaccine
D.
Live attenuated vaccine
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Solution
Live attenuated vaccines contain live pathogens that have been weakened so they cannot cause disease but still elicit a strong immune response.
Correct Answer:
D
— Live attenuated vaccine
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Q. Which vaccine is used to prevent measles?
A.
DTP vaccine
B.
MMR vaccine
C.
Hepatitis B vaccine
D.
Influenza vaccine
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Solution
The MMR vaccine protects against measles, mumps, and rubella, and is typically administered in childhood.
Correct Answer:
B
— MMR vaccine
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Q. Which vaccine type contains live attenuated pathogens?
A.
Inactivated vaccines
B.
Subunit vaccines
C.
Live attenuated vaccines
D.
Toxoid vaccines
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Solution
Live attenuated vaccines contain weakened forms of the pathogen that can still elicit an immune response.
Correct Answer:
C
— Live attenuated vaccines
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Q. Which vaccine type is most effective in inducing a strong cell-mediated immune response?
A.
Inactivated vaccines
B.
Live attenuated vaccines
C.
Subunit vaccines
D.
Toxoid vaccines
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Solution
Live attenuated vaccines are effective in inducing strong cell-mediated immune responses due to their ability to replicate and mimic natural infection.
Correct Answer:
B
— Live attenuated vaccines
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Q. Which vitamin is primarily absorbed in the large intestine?
A.
Vitamin A
B.
Vitamin B12
C.
Vitamin K
D.
Vitamin C
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Solution
Vitamin K is primarily absorbed in the large intestine, where it is produced by gut bacteria.
Correct Answer:
C
— Vitamin K
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Q. Which vitamin is primarily derived from green leafy plants and is essential for blood clotting?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin K
D.
Vitamin E
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Solution
Vitamin K is crucial for blood clotting and is abundant in green leafy vegetables.
Correct Answer:
C
— Vitamin K
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Q. Which vitamin is primarily derived from plants and is essential for human vision?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin D
D.
Vitamin K
Show solution
Solution
Vitamin A, particularly in the form of beta-carotene from plants, is crucial for vision.
Correct Answer:
A
— Vitamin A
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Q. Which vitamin is primarily derived from plants and is essential for vision?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin D
D.
Vitamin K
Show solution
Solution
Vitamin A, found in carrots and other plants, is crucial for maintaining healthy vision.
Correct Answer:
A
— Vitamin A
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Q. Which vitamin is primarily derived from the plant pigment beta-carotene?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin D
D.
Vitamin E
Show solution
Solution
Beta-carotene is a precursor to Vitamin A, essential for vision and immune function.
Correct Answer:
A
— Vitamin A
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Q. Which vitamin is primarily obtained from green leafy plants and is essential for blood clotting?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin K
D.
Vitamin E
Show solution
Solution
Vitamin K is crucial for blood clotting and is abundant in green leafy vegetables.
Correct Answer:
C
— Vitamin K
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Q. Which vitamin, primarily sourced from plants, is crucial for maintaining healthy vision?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin D
D.
Vitamin K
Show solution
Solution
Vitamin A, found in carrots and leafy greens, is essential for good vision.
Correct Answer:
A
— Vitamin A
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