Hi Aspirant,

You can easily get Gate Exam botany biology papers of past years in site such as easybiologyclass site in web.This site has all the question paper withb  easy solution.You can also refer to the book Lifescience Botany Gate 2020 and you can get it in amazon or any other book store.

These are the some of the place where you can get the question papers.

Hope it helps!!