saurabh if i do bsc biotechnology then will i have to do calculus, differential equations etc?

Hello Krishna,
Yes, of course. Linear Algebra, Calculus, Differential Equations, Probability and Statistics, Numerical Methods only these topics are covered in the Mathematics Section in the gate syllabus for the biotechnology.
For more details about that, please go through the link given below
https://engineering.careers360.com/articles/gate-syllabus-for-biotechnology
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All the best.