Can I apply for the Indian Air Force after 12th with Biology???? What are the basic requirements???

Yes you can join Indian Air Force after 12th with Biology, through the National Defence Academy examination which is conducted by the Union public service commission (UPSC) twice in a year.

The National Defence Academy has following three wings:

Indian Air Force
Indian Navy
Indian Army

Eligibility Criteria
The applicant must have completed 12th standard with science subjects from any recognized board of India.

Age limit
Age should be in between 16.5 to 19 years old.

Physical requirements:
Better eye is 6/6 and worst eye is 6/9 with or without glass
Running: - 2.4 Km in 15 minutes
Push ups: - 13 nos
Sits ups: - 25 nos
Chin ups: - 6 nos
Rope - Climbing :- 3-4 meters.