@Sunil
For NEET preparation first of all you need to study and learn NCERT well enough. For biomolecules read the whole chapter, solve exercise questions and practise more and more previous year questions. Now important concepts biomolecules include bonding. so learn the names of bonds in carbohydrates, nucleic acids,proteins, fats etc. Learn how they are formed and between which components they are formed. The primary secondary and tertiary structure of proteins is also important, learn how they re different from each other and how they are represented. Enzyme classification is important, learn examples of each class. Mechanism of enzyme action and the graph given for it is very important. Learn definitions proenzymes, allosteric enzymes, isoenzymes. competitive inhibition.