Based on analysis of the previous question papers, there are few topics which carry more weightage in the terms of questions being asked. You can check them at: https://medicine.careers360.com/articles/do-or-die-chapters-for-neet . To give you a gist,

In Physics, Highest weightage goes to Optics at 10%. Thermodynamics, Electrostatics, Electronic devices share 9%. Current Electricity and Electromagnetic induction, Alternating current take 8%. Dual Nature of Radiation gets 6% while Motion systems of rigid particles and body and Magnetic effects of Currents, Electromgentic waves and Magentism get 5%. Work, Energy and Power take 4%, Atoms and nuclei, Oscillation and Waves, Properties of Bulk Matter, Laws of Motion and Kinematics share 3% and the rest of the topics carry 2% weightage.

In Chemistry, Coordination points get 9% of weightage. Thermodynamics takes the 8% and Equilibrium takes the 6% weightage slots respectively. Chemical Bonding and Organic structure carries the 5% weightage slot and rest of the topics carry 2-3% weightage in the exam paper.

In Biology, Human Physiology and Genetics have maximum weightage in NEET. Diversity of Living Organisms has 14% weightage. Structural Organisationi n Plants and Animals takes 5%. Plant Physiology has 6% and Cell Structure and Function has 9%. Human Physiology has 20% weightage. Reproduction chapter has 9% and Genetics and Evolution has 18% weightage. Biology and Human Welfare has 9% weightage. Biology and its application has 4% weightage and Ecology and Environment has 6% weightage.