With just 2 days left for NEET UG 2025, candidates are in the crucial phase of last-minute revision. Biology, being the most scoring and significant section of the NEET exam, demands focused attention. To help students make the most of this limited time, we’ve curated the Top 30 Biology Concepts that are essential for quick and effective revision. These high-yield topics — especially from Human Physiology, Genetics, Ecology, and other NCERT-based chapters are frequently asked and carry substantial weightage. Revisiting these concepts can boost your confidence, enhance accuracy, and help you secure a better score on May 4, 2025.
Also Check:
| NEET Exam Pattern, Marking Scheme 2025 | High Weightage Chapters for NEET 2025 | NEET Physics Formula Sheet 2025 PDF |
NEET 2025 Key Highlights
Particulars | Details |
| Exam Name | National Eligibility cum Entrance test (NEET) |
| Exam conducting body | National Testing Agency (NTA) |
| Eligibility criteria | 10+2 with Physics, Chemistry, Biology |
| Minimum age | 17 years |
| Exam date | To be announced |
| Exam mode | Offline (Pen-paper based) |
| Number of Questions | 180 Multiple Choice Questions (MCQs) |
| Marks per question | 4 Marks to be allotted for each correct answer |
| Negative Marking | 1 mark to be deducted for each wrong answer |
| Total Marks | 720 Marks |
| Language options | English, Hindi, Assamese, Bengali, Gujarati, Kannada, Malayalam, Marathi, Odia, Punjabi, Tamil, Telugu, and Urdu |
| Exam duration | 3 Hours |
| Aadhaar card not mandatory | Aadhaar card is not mandatory to fill out the application form |
| Official website | neet.nta.nic.in |
Check NEET UG Subject-wise Syllabus 2025
NEET UG 2025: 20 Must-Know Biology Concepts to Revise
Here is a breakdown of 20 must-know biology concepts for NEET UG 2025, organized by major areas of study within Biology. This information provides a quick review of essential topics to focus on during your last-minute preparations.
Area of Study | Concept | Description |
|---|---|---|
Human Physiology | Digestion and Absorption | Breakdown of food molecules, enzyme and hormone roles, and digestive processes. |
| Breathing and Respiration | Exchange of oxygen and carbon dioxide, mechanisms of breathing, gas exchange, and transport. | |
| Body Fluids and Circulation | Blood and lymph composition, circulation, and transport functions. | |
Genetics and Evolution | Mendelian Inheritance | Laws of inheritance, principles of segregation, independent assortment, and dominance. |
| DNA Structure and Replication | Structure, replication, and repair mechanisms of DNA. | |
| Evolution Theories | Theories of evolution, including natural selection and speciation. | |
Plant Physiology | Photosynthesis | Light and dark reactions, role of pigments and electron carriers. |
| Respiration in Plants | Aerobic and anaerobic pathways, role of mitochondria. | |
| Plant Growth and Development | Role of auxins, gibberellins, and other hormones. | |
Cell Structure and Function | Cell Organelles | Structure and function of mitochondria, chloroplasts, and lysosomes. |
| Cell Division | Stages of mitosis and meiosis. | |
Ecology and Environment | Ecosystem | Structure, function, and interactions within an ecosystem. |
| Biodiversity and Conservation | Importance, threats, and conservation strategies. | |
Reproduction | Reproduction in Humans | Gamete formation, fertilization, and embryonic development. Male and female reproductive systems, gametogenesis and fertilization processes. |
| Reproduction in Plants | Flower formation, pollination, fertilization, and seed development. Flower structure and function, pollination and fertilization processes. | |
Diversity of Life | Classification of Organisms | Principles of classification, different kingdoms, and phyla. |
| Plant Kingdom | Characteristics and evolutionary relationships of different plant groups. | |
| Animal Kingdom | Characteristics and evolutionary relationships of different animal groups. | |
Biotechnology | DNA Technologies | Principles and applications of genetic engineering, DNA fingerprinting, and gene therapy. |
| Biotechnology Applications | Applications in medicine, agriculture, and industry; potential benefits and risks. |
Also Check: NEET Exam Pattern 2025 (Revised)
NEET Chapter Wise Weightage 2025 by NTA
NEET 2025 Exam: Study Plan
Time Slot | Activity |
| 6:00 AM – 9:30 AM | Revise Biology (Key chapters & NCERT Focus) |
| 9:30 AM – 10:00 AM | Break/Rest |
| 10:00 AM – 1:00 PM | Practice Physics (Problem-solving and concepts) |
| 1:00 PM – 2:00 PM | Lunch and Relaxation |
| 2:00 PM – 5:00 PM | Full-length Mock Test |
| 5:00 PM – 6:00 PM | Analyse Mock Test Performance |
| 6:00 PM – 8:30 PM | Revise Chemistry (Organic & Inorganic Focus) |
| 8:30 PM – 9:00 PM | Break |
| 9:00 PM – 10:30 PM | Rapid Revision Notes, and go through the main concepts |
| 10:30 PM onwards | Relax and get enough sleep |
By sticking to this 5-day NEET study plan, you can improve your performance and sit for the exam with confidence. Keep your NEET quick revision notes in readiness, and utilise the remaining time you have. You've invested months of hard work, and the final week is an ideal time to solidify everything and make sure you're adequately ready to sit for the NEET exam. This balanced plan provides sufficient concentration on every subject while giving space for practice, revision, and relaxation. Adapt timing according to individual efficiency and energy levels.
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