Hello,

You're enquiring about which paper in IIT JAM, you can appear for MSc Biotechnology in IIT JAM, for that you're required to have studied biology at 10+2 level which I believe you already have, in case of other papers there is mandatory requirements of having studied specific subjects at 10+2 or graduation level, there is no upper age limit regarding this, however you have to make sure you have passed BSc degree from a recognized university, and candidates in the final year too are eligible to apply however they need to show the proof of their qualifying examination within the prescribed time frame as mentioned by the official, check out the our page  at https://jam.iitr.ac.in/eligibility-requirements-ers-for-admission.html to know more details regarding this.

Also, you can visit the official website at https://jam.iitr.ac.in/ (https://jam.iitr.ac.in/eligibility-requirements-ers-for-admission.html) to know more details about IIT JAM.