Hey,

Yes, you can surely do that. The Eligibility criteria for DU B.SC Zoology is mentioned below:

• You need to have aggregate 60% marks in Physics, Chemistry, Biology/Biotechnology/Biochemistry.

As, Biotechnology is a mentioned subject, even if you use it in place of Biology, there will be no reduction in marks. Also, in best four criteria of elhi University also, Biotechnology marks will be considered. So, you can surely go for it.

Know more about it over here: https://university.careers360.com/articles/du-admission

https://university.careers360.com/articles/du-bsc-eligibility-criteria