Hello, yes biology is necessary for giving NEET UG EXAM,  having atleast 50 percent in PCB in class 12th is the primary eligibility criteria for giving NEET exam, if you haven't opt for biology , I am sorry but it is not possible to appear for the entrance.
Best regards,
Thank you

Hi aspirant, 

For you to appear in neet ug you should have biology as a subject in class 12 and 11. Class 11 subjects  matter  as in  the syllabus of neet ug class 11 syllabus is also included so its better to opt biology in class 11 to have basic understanding of every topic amd reduce burdern at the end while preparing for neet. Hope you are clear with it!! 

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