2x inteviews (2 inteviewers each)
Discussion based around an example of unfamiliar plant; some maths questions; other A-Level standard questions
Practice interviews with unknown people
Don't forget to revise chemistry and maths too!
Remember this advice isn't official. There is no guarantee it will reflect your experience because university applications can change between years. Check the official Cambridge and Oxford websites for more accurate information on this year's application format and the required tests.
Also, someone else's experience may not reflect your own. Most interviews are more like conversations than tests and like, any conversation, they are quite interactive.
2 Interviews each with 2 interviewers who took it in turns to ask questions.
I was shown a plant with some unusual features and asked about causes of them / the advantage to the plant. Later questions involved something about designing experiments (we related this to the plant from before). Discussed topic on my personal statement. I had maths question about drawing the graph of a function. I didn’t get the first question so they gave me a new one. They asked what I wanted to talk about and then extended questions from there (mostly A-level).
Practise interviews with unknown people. Revise everything you have covered in lessons.
Don’t forget to revise all subjects chemistry and maths, I focused too much on biology.