B.Sc Chemistry

Actually you can't do like this. If you have Masters in maths then cannot go for Ph.D. in Physics without Masters in physics. Similarly you should have maths as core subject to do M.Sc. in maths. Chemistry honours students cannot do maths honours if they don't have maths.

Admission process currently is available online you can fill up the form and wait for your 12th result. Because admission is done on the basis of cut-off lists that will be soon available online after the result got declared and on the basis you will get your desired college based on your 12th percentage.

I am sending you an Authentic link from where you will get all information related to the Bsc Biotechnology course.
link-https://www.shiksha.com/science/articles/bsc-biotechnology-top-colleges-eligibility-criteria-admission-process-fees-blogId-35365

Hi,
Yes,
You have to register again.
For more details please go through the link. https://www.shiksha.com/university/msu-the-maharaja-sayajirao-university-of-baroda-vadodara-37071/admission
Good luck.

Yes you can do. The basic eligibility criteria of DMLT is 12th with PCB.