Hello,

Biomolecule is a very interesting chapter and even more important for future studies.  I would suggest you to try understanding the chapter when in fresh mind.

As for your query, there are many youtube channels that have an excellent explanation for this chapter. Listing a few

• Shomu's Biology
• Khanacademy
• BYJU's
• Unacademy
• Apni Kaksha
• NCERT Wallah

Other than these channels you may refer some books which might help you, the best one is Principles of Biochemistry by Lehninger.

Also check the link below it would provide you with general information and notes about the chapter

https://learn.careers360.com/chemistry/biomolecules-chapter/

https://learn.careers360.com/ncert/questions/cbse_12_class-chemistry-biomolecules-in_text_question/

All the Best