Biology (School & UG)

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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. What is the main advantage of using marker-assisted selection in plant breeding?
  • A. It reduces the need for fertilizers
  • B. It speeds up the breeding process
  • C. It eliminates the need for irrigation
  • D. It increases the size of fruits
Q. What is the main advantage of using plasmids as vectors in cloning?
  • A. They are large and complex
  • B. They replicate independently of chromosomal DNA
  • C. They are difficult to manipulate
  • D. They do not carry antibiotic resistance genes
Q. What is the main advantage of using steam sterilization over dry heat sterilization?
  • A. Faster sterilization time
  • B. Lower temperatures required
  • C. More effective against spores
  • D. All of the above
Q. What is the main advantage of using transgenic plants in agriculture?
  • A. Higher market prices
  • B. Increased crop yield
  • C. More labor-intensive farming
  • D. Reduced biodiversity
Q. What is the main benefit of consuming antioxidants found in fruits and vegetables?
  • A. Increase energy
  • B. Reduce inflammation
  • C. Enhance digestion
  • D. Improve vision
Q. What is the main benefit of consuming cruciferous vegetables like broccoli and kale?
  • A. High protein content
  • B. Rich in antioxidants
  • C. Low calorie count
  • D. High fat content
Q. What is the main benefit of consuming dietary fiber from plants?
  • A. Increased energy
  • B. Improved digestion
  • C. Enhanced taste
  • D. Faster metabolism
Q. What is the main benefit of consuming omega-3 fatty acids found in certain plants?
  • A. Improved digestion
  • B. Enhanced cognitive function
  • C. Increased energy
  • D. Better skin hydration
Q. What is the main byproduct of photosynthesis?
  • A. Oxygen
  • B. Carbon dioxide
  • C. Glucose
  • D. Water
Q. What is the main characteristic of sclerenchyma cells?
  • A. Flexible and living at maturity
  • B. Thick, lignified cell walls and dead at maturity
  • C. Thin cell walls and living at maturity
  • D. Photosynthetic and living at maturity
Q. What is the main component of the plant cell wall?
  • A. Cellulose
  • B. Chitin
  • C. Lignin
  • D. Pectin
Q. What is the main difference between aerobic and anaerobic respiration in plants?
  • A. Oxygen requirement
  • B. Energy yield
  • C. Location in the plant
  • D. Type of glucose used
Q. What is the main difference between disinfection and sterilization?
  • A. Disinfection kills all microbes; sterilization does not
  • B. Sterilization kills all microbes; disinfection reduces microbial load
  • C. Disinfection is used on inanimate objects; sterilization is not
  • D. There is no difference
Q. What is the main difference between respiration and photosynthesis in plants?
  • A. Respiration occurs only at night
  • B. Photosynthesis produces energy, respiration consumes it
  • C. Respiration occurs in chloroplasts, photosynthesis in mitochondria
  • D. Photosynthesis requires light, respiration does not
Q. What is the main difference between sterilization and disinfection?
  • A. Sterilization kills all microbes; disinfection reduces them
  • B. Disinfection kills all microbes; sterilization reduces them
  • C. Sterilization is faster than disinfection
  • D. Disinfection is only for surfaces, sterilization is for instruments
Q. What is the main ecological benefit of seed dispersal?
  • A. Increases competition among plants
  • B. Promotes genetic uniformity
  • C. Facilitates colonization of new habitats
  • D. Reduces plant diversity
Q. What is the main energy carrier produced during the light reactions?
  • A. NADPH
  • B. ATP
  • C. FADH2
  • D. Glucose
Q. What is the main energy currency produced during the light reactions?
  • A. NADPH
  • B. FADH2
  • C. ATP
  • D. Glucose
Q. What is the main enzyme involved in the carbon fixation process during the dark reactions?
  • A. RUBISCO
  • B. ATP synthase
  • C. NADP+ reductase
  • D. Phosphofructokinase
Q. What is the main function of alkaloids in plants?
  • A. Energy storage
  • B. Defense against herbivores
  • C. Water retention
  • D. Photosynthesis
Q. What is the main function of antioxidants found in plants?
  • A. Promote growth
  • B. Prevent oxidative stress
  • C. Aid in reproduction
  • D. Enhance photosynthesis
Q. What is the main function of chlorophyll in plants?
  • A. Water absorption
  • B. Nutrient transport
  • C. Light absorption
  • D. Gas exchange
Q. What is the main function of cytotoxic T cells?
  • A. Produce antibodies
  • B. Kill infected or cancerous cells
  • C. Activate B cells
  • D. Secrete cytokines
Q. What is the main function of phagocytes in the immune system?
  • A. To produce antibodies
  • B. To present antigens
  • C. To engulf and digest pathogens
  • D. To secrete cytokines
Q. What is the main function of phloem in plants?
  • A. Transport water
  • B. Transport nutrients
  • C. Transport sugars
  • D. Support structure
Q. What is the main function of phloem in vascular plants?
  • A. Transport water
  • B. Transport nutrients
  • C. Transport sugars
  • D. Support structure
Q. What is the main function of plant leaves in relation to photosynthesis?
  • A. Water storage
  • B. Gas exchange
  • C. Nutrient absorption
  • D. Support
Q. What is the main function of root hairs?
  • A. Photosynthesis
  • B. Nutrient absorption
  • C. Support
  • D. Storage
Q. What is the main function of sclerenchyma cells in plants?
  • A. Photosynthesis
  • B. Support
  • C. Storage
  • D. Transport
Q. What is the main function of stomata in plant leaves?
  • A. Nutrient absorption
  • B. Gas exchange
  • C. Water storage
  • D. Photosynthesis
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