Hey,

There is no college in du which provide biotechnology course but it do provide similar course namely bsc in BMS ( Bio Medical science).

These are the colleges in du providing the course-

Acharya Narendera Dev College 

Bhaskar Acharya College of applied science 

Shaheed rajguru college of applied science for women 

You may check their cutoffs of previous years to have a better idea at the official website of du.

Hope this helps!