15 Important Biology Formulas & Equations Every Class 11 & 12 Student Should Know (2026)
15 Important Biology Formulas & Equations
Class 11 • Class 12 • NEET • Bihar Board
Biology mein Physics aur Chemistry ki tarah bahut saare numerical formulas nahi hote, lekin kuch important formulas, equations aur calculations har student ko yaad hone chahiye. Ye formulas Board Exams, NEET aur school exams mein frequently pooche jaate hain.
Exam se pehle in sabhi formulas ko ek baar zarur revise karein.
1. Magnification (Microscope)
Magnification = Image Size ÷ Actual Size
Use: Microscope image ka magnification calculate karne ke liye.
2. Cell Doubling Formula
Number of Cells = 2n
n = Number of Cell Divisions
3. Water Potential
Ψ = Ψs + Ψp
- Ψ = Water Potential
- Ψs = Solute Potential
- Ψp = Pressure Potential
4. Photosynthesis Equation
Sunlight + Chlorophyll ki presence mein.
5. Cellular Respiration
Energy production process.
6. ATP Production
7. Population Growth Formula
- Nt = Final Population
- N₀ = Initial Population
- r = Growth Rate
- t = Time
8. Body Mass Index (BMI)
9. Heart Rate
10. Pulse Pressure
11. Mean Arterial Pressure (MAP)
12. Hardy-Weinberg Equation
Genetics mein allele frequency calculate karne ke liye.
13. Genetic Probability
14. Growth Rate
15. Surface Area to Volume Ratio
Cell size aur transport efficiency ko explain karta hai.
📋 Quick Revision Table
| Topic | Formula / Equation |
|---|---|
| Magnification | Image Size ÷ Actual Size |
| Cell Division | 2ⁿ |
| Water Potential | Ψ = Ψs + Ψp |
| Photosynthesis | 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ |
| Respiration | Glucose + O₂ → CO₂ + H₂O + ATP |
| Genetics | p² + 2pq + q² = 1 |
💡 Exam Tip
Agar aap Bihar Board, CBSE ya NEET ki preparation kar rahe hain, to in formulas ko rozana revise karein. Inme se kai formulas aur equations objective aur numerical questions mein directly pooche jaate hain.