Do all chapters of Human Physiology need to be prepared well for NEET exam?

There are various topics or questions which have been repeated the most in NEET Biology section. Have a look at the NEET Biology most repeated questions in past few years below-

• Respiratory system
• Digestive enzymes & hormones
• Sliding filaments theory
• Mendelian crosses
• Genetic disorders (Turner, Down, Kli

The ratio of the Class 11 and Class 12 questions from Biology asked in the NEET 2025 exam is given in the table below. 

Some of the topics with a high weightage in the NEET question paper are given below, along with the number of questions asked. 

Note: The NEET Biology chapter-wise topics mentioned above are based on this year, and the weigtages may change next year. 

In general, the difficulty level of the NEET Biology section is easy to moderate. As compared to the other two sections, Biology has the lowest difficulty level. Moreover, the majority of the candidates score the highest in this section. According to the NEET 2025 analysis by the students and expert

Human Physiology is the study of various functions and mechanism to sustain human body. It comprises how various cells, molecules, tissues, organs work to sustain life of human body.