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Biology is often considered a theory-based subject, but several important formulas and equations play a crucial role in understanding concepts like physiology, genetics, and biochemistry. This page provides a complete list of biology formulas designed for quick revision and exam success.

Best for: NEET, Class 10, Class 12, and competitive exams.

Important Biology Formulas for Exams

Hardy Weinberg Law

p + q = 1

p2 + 2pq + q2 = 1

Where :

p = frequency of allele 'A';

q = frequency of allele 'a';

p2 = AA genotype frequency;

2pq = Aa genotype frequency;

and q2 = aa genotype frequency.

Important Biology Formulas for Exams

Photosynthesis Equation:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Respiration Equation:
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy (ATP)

Human Physiology Formulas

Cardiac Output:
Cardiac Output = Heart Rate × Stroke Volume

Body Mass Index (BMI):
BMI = Weight (kg) / Height² (m²)

Blood Pressure:
BP = Cardiac Output × Peripheral Resistance

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Genetics & Inheritance Formulas

Mendel’s Ratio (Monohybrid Cross):
Phenotypic Ratio = 3:1

Genotypic Ratio:
1:2:1

Hardy-Weinberg Equation:
p² + 2pq + q² = 1

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Plant Biology Equations

Transpiration Rate:
Water Loss per unit time

Growth Rate:
GR = (Final Size - Initial Size) / Time

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Biotechnology & Molecular Biology

DNA Replication Rule:
A = T, G ≡ C

Protein Synthesis:
DNA → RNA → Protein

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Why Biology Formulas Are Important?

Biology formulas help simplify complex biological processes into easy-to-understand expressions. They are especially useful in:

  • Quick revision before exams
  • Understanding core concepts faster
  • Solving numerical problems in physiology and genetics
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Quick Revision Tips

  • Revise formulas daily
  • Use diagrams along with equations
  • Practice previous year questions
  • Create short notes for last-minute revision
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Frequently Asked Questions (FAQs)

Q1: Is biology formula-based?
Biology is mostly conceptual but includes important formulas in genetics, physiology, and biochemistry.

Q2: Which formulas are important for NEET?
Photosynthesis, respiration, Hardy-Weinberg equation, and BMI are highly important.

Q3: How to remember biology formulas?
Practice regularly, use mnemonics, and revise using short notes.

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Conclusion: Mastering biology formulas can significantly improve your exam performance. Keep revising this page and practice regularly to stay ahead.