Most Important Subjects for MBBS (By Real-Life Use)

1. Biology (Highest importance)

Why?

• MBBS is a medical degree – everything is about the human body, diseases, physiology, and anatomy.
• All clinical subjects (Medicine, Surgery, Paediatrics, etc.) are built on Biology.
• Without strong Biology, MBBS becomes very difficult.

Useful areas:

• Cell biology
• Human physiology
• Human anatomy
• Genetics
• Immunology

2. Chemistry (Second-most important)

Why? Doctors use chemistry every day, especially:

• Biochemistry (metabolism, enzymes, hormones)
• Pharmacology (drug interactions, doses, side effects)

Real-life examples:

• Why insulin works?
• How kidneys maintain acid–base balance?
• How drugs break down in the liver?

Without chemistry, understanding Medicine becomes confusing.

3. Physics (Moderately important)

Important areas only:

• Optics →→→ ophthalmology
• Mechanics →→→ blood flow, ventilation machines
• Radioactivity →→→ radiology, CT/MRI
• Pressure/fluids →→→ blood pressure, IV flow

Real-life use:

• How ECG works
• How ventilators work
• How blood flows (hemodynamics)

You don’t need advanced physics. Only medical physics matters.

4. English (Academically important)

Why? All authentic  MBBS textbooks are in English.Medical records, prescriptions, research-all in English.

Real-life use:

• Communicating with colleagues
• Writing case files, reports
• Reading guidelines (all in English)
• You don’t need advanced literature- only medical English matters.

5. Mathematics (Lowest importance, but still useful)

MBBS uses very simple maths, such as:

• Drug dose calculation
• Drip rate calculation
• BMI, cardiac output, statistics
• Research basic statistics
• You don’t need high-level maths (like calculus, trigonometry, etc.).
• Maths is the least required, but doctors still use basic arithmetic and logic daily.

FINAL RANKING (Most to Least Important)

1. Biology
2. Chemistry
3. Physics
4. English
5. Maths

SUMMARY

• Biology →→→→ 60% importance
• Chemistry →→→ 20%
• Physics →→→→ 10%
• English →→→→ 7%
• Maths →→→→→ 3%

Author: Master Vikrant RohinMaster Vikrant Rohin is an international author, and more than four countries’ schools are using his books in the core curriculum of education. He is the author of twenty different subject books. History, Economics, Chemistry, Physics, English, Biology, Geography etc. Most of his students hold high-ranking positions in the public and private sectors. He has cracked the world’s toughest exam, the "Civil Services Examination (UPSC)," eight times. Always a topper in academics, he was also a top-class sportsman, a state boxer, and a basketball player.