NEET Biology Most Repeated Questions: Complete 10-Year Analysis

Understanding which topics and question types repeat in NEET can dramatically improve your score. Our analysis of 10 years of NEET papers (2015-2025) reveals clear patterns that help you focus your preparation.

This guide identifies the most repeated Biology questions so you can prioritize high-yield topics and secure 280+ marks in Biology.

Why Question Pattern Analysis Matters

The Repetition Reality

Key Insight: If you master the topics that repeat every year, you're almost guaranteed 250+ marks in Biology.

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Chapter-wise Analysis: Most Repeated Topics

1. Human Physiology (15-18% of Biology)

Most Repeated Topics:

Sample Repeated Questions:

1. Cardiac Cycle (Asked every year):

   • "Duration of cardiac cycle at 72 bpm" → 0.8 seconds
   • "Which heart sound is 'Lub'?" → Closure of AV valves
   • "SA node is called pacemaker because..." → Generates action potential

2. Nephron (Asked every year):

   • "GFR value" → 125 mL/min
   • "Counter-current mechanism occurs in" → Loop of Henle, vasa recta
   • "JGA secretes" → Renin

3. Hormones (Asked every year):

   • "Emergency hormone" → Adrenaline
   • "Which hormone regulates blood calcium?" → Parathyroid hormone
   • "Gonadotropins are released from" → Anterior pituitary

Must-Know Values:

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2. Genetics & Molecular Biology (14-16% of Biology)

Most Repeated Topics:

Sample Repeated Questions:

1. Mendel's Laws (Asked every year):

   • "9:3:3:1 ratio indicates" → Independent assortment
   • "Test cross ratio for dihybrid" → 1:1:1:1
   • "Law of segregation is also called" → Law of purity of gametes

2. DNA Replication:

   • "Okazaki fragments are formed on" → Lagging strand
   • "Leading strand is synthesized" → Continuously, 5' to 3'
   • "DNA polymerase adds nucleotides at" → 3' end

3. Genetic Disorders (Asked every year):

   • "47, XXY karyotype" → Klinefelter syndrome
   • "Trisomy 21" → Down syndrome
   • "XO condition" → Turner syndrome

Must-Know Genetic Ratios:

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3. Ecology (10-12% of Biology)

Most Repeated Topics:

Sample Repeated Questions:

1. Population Growth (Asked every year):

   • "J-shaped curve represents" → Exponential growth
   • "S-shaped curve represents" → Logistic growth
   • "Carrying capacity is denoted by" → K

2. Energy Flow:

   • "10% law was given by" → Lindeman
   • "Which pyramid is never inverted?" → Pyramid of energy
   • "Primary productivity is highest in" → Tropical rainforests

3. Biodiversity:

   • "India has ____ biodiversity hotspots" → 4
   • "In-situ conservation example" → National park
   • "Ex-situ conservation example" → Seed bank, Zoo

Must-Know Ecological Terms:

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4. Reproduction (9-11% of Biology)

Most Repeated Topics:

Sample Repeated Questions:

1. Menstrual Cycle:

   • "Ovulation occurs on day" → 14
   • "Corpus luteum secretes" → Progesterone
   • "LH surge causes" → Ovulation

2. Gametogenesis:

   • "Spermatogenesis occurs in" → Seminiferous tubules
   • "One primary oocyte gives" → One ovum
   • "One primary spermatocyte gives" → Four sperms

3. Plant Reproduction:

   • "Triple fusion results in" → Endosperm (3n)
   • "Synergids are located at" → Micropylar end
   • "Megaspore mother cell divides by" → Meiosis

Must-Know Reproductive Values:

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5. Cell Biology (7-9% of Biology)

Most Repeated Topics:

Sample Repeated Questions:

1. Cell Organelles:

   • "Powerhouse of cell" → Mitochondria
   • "Suicidal bags" → Lysosomes
   • "Protein synthesis occurs in" → Ribosomes

2. Cell Cycle:

   • "DNA replication occurs in" → S phase
   • "Cell prepares for division in" → G2 phase
   • "Crossing over occurs in" → Prophase I of meiosis

Must-Know Cell Facts:

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6. Plant Physiology (6-8% of Biology)

Most Repeated Topics:

Sample Repeated Questions:

1. Photosynthesis:

   • "RuBisCO is found in" → C3 plants (mainly)
   • "Kranz anatomy is seen in" → C4 plants
   • "Photorespiration occurs in" → C3 plants

2. Plant Hormones:

   • "Which hormone causes bolting?" → Gibberellin
   • "Ethylene is used for" → Fruit ripening
   • "Abscisic acid is also called" → Stress hormone

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7. Diversity of Life (7-8% of Biology)

Most Repeated Topics:

Sample Repeated Questions:

1. Animal Kingdom:

   • "Jointed appendages are characteristic of" → Arthropoda
   • "Water vascular system is found in" → Echinodermata
   • "Flame cells are found in" → Platyhelminthes

2. Classification:

   • "R.H. Whittaker proposed" → Five kingdom classification
   • "Lichens are association of" → Algae and fungi
   • "Virus was discovered by" → Ivanowsky

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High-Yield NCERT Lines (Direct Questions)

Lines That Appear Almost Every Year

NCERT Tables to Memorize

1. Comparison tables:

   • Mitosis vs Meiosis
   • C3 vs C4 vs CAM
   • Arteries vs Veins
   • DNA vs RNA

2. Classification tables:

   • Five kingdoms characteristics
   • Animal phyla features
   • Plant groups comparison

3. Value tables:

   • Respiratory volumes
   • Blood cell counts
   • Hormone sources and functions

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Pattern Analysis by Question Type

Assertion-Reason Questions

Common patterns in Biology A-R:

Most repeated A-R topics:

1. Cell organelles and their features
2. Genetic disorders and their causes
3. Hormone functions and glands
4. Ecological relationships

Diagram-Based Questions

Most asked diagrams:

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Year-wise Question Distribution

Biology Questions by Unit (Average)

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Study Strategy Based on Analysis

Priority 1: Must Master (40% study time)

Priority 2: Important (35% study time)

Priority 3: Complete (25% study time)

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Practice Questions: Most Repeated Types

Type 1: Value-Based (Practice 50+)

• What is GFR?
• Normal cardiac output?
• Duration of cardiac cycle?
• Ovulation occurs on which day?

Type 2: Comparison (Practice 30+)

• Mitosis vs Meiosis
• C3 vs C4 plants
• Spermatogenesis vs Oogenesis
• Exponential vs Logistic growth

Type 3: Function-Based (Practice 40+)

• Function of corpus luteum?
• Role of SA node?
• Function of JGA?
• Role of RuBisCO?

Type 4: Location-Based (Practice 30+)

• Where does protein synthesis occur?
• Site of transcription?
• Location of Kranz anatomy?
• Where is nephron located?

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Conclusion: Your Action Plan

Based on this 10-year analysis:

1. Master the top 40 repeated topics - guaranteed 200+ marks
2. Memorize NCERT lines - direct questions every year
3. Practice diagrams - 15-20% questions are diagram-based
4. Know all values and numbers - frequently tested
5. Solve 10-year PYQs chapter-wise - recognize patterns

Remember: The NEET paper is 60-70% predictable. Master the patterns, secure your score.

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Get Complete PYQ Analysis

At Cerebrum Biology Academy, we provide:

• 10-year PYQ chapter-wise PDF with topic tagging
• Repeated questions bank with answer keys
• Pattern analysis videos for each chapter
• Mock tests based on repeated patterns

Download Free PYQ Analysis | Join Our Course

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The past predicts the future. Master what's repeated, secure what matters.