Hello aspirant,
You have not mentioned your Caste Category, so I'm considering it as General Category and giving information based on it.
You have not specified the course name for which you want to know cut-offs. Cut-offs varies from College to College and course to course and category to category.
Based on previous year's cut-offs minimum 92 to 98 percentage is required to be on safe side to get admission into Biology related courses.
Cut-offs depends on many factors like caste category of the students, number of seats available, difficulty level of the exam, number of students appeared in the exam, etc.
To get more information about previous year's cut-offs of Delhi University, New Delhi affiliated Colleges, use below mentioned link.
https://du.ac.in/adm2019/pdf/Cutoff/First/1st%20Cut-Off%20-%20Science.pdf
May this information was useful to you.
Good Luck!!

DU Delhi

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