what we want to do for being scientists.

You have tagged Animal Biochemistry in your question. So I assume you want to be a scientist in the field of Biochemistry, then I would recommend you to go for BSc in Biochemistry as a subject of UG studies. After that you can go for MSc course in Biochemistry or any other courses then you can pursue two careers. The first type of career that you can go for MSc course then you can go for PGD courses in Medicinal Biochemistry/ Pharmaceutical Biochemistry/ Biochemical Sciences.

Now you can go for PhD and post doc in the subject after your MSc which will lead you to a research scientist. And on gaining experience you will get a good positions as a scientist. So you can follow it up.

To know more about Biochemistry visit the link below:

https://www.careers360.com/courses/bio-chemistry-course

I hope this answer helps. All the very best for your future endeavors!