Department of Biological Sciences : Graduate Application Deadline & Criteria for Admission

Application Deadlines

December 7 is the deadline for all domestic and international applicants.

We reserve the right to reject any application that is submitted or completed after the deadline.

While no single factor or score can characterize an applicant's probability for success, the following benchmarks may prove helpful.

Please ensure you meet ALL minimum requirements BEFORE you apply to our program


  • Typically, a 3.00/4.00 grade point average (GPA) is considered a minimum requirement
  • US applicants have an average GPA of 3.00 or higher.
  • International applicants are typically in the top 5% of their graduating class, or higher.

          International applicants from India who have a 3 year Bachelors degree are required to complete a 2 year Masters degree before applying.


The Department of Biological Sciences at Purdue University requires all applicants to take the Aptitude Test (verbal, quantitative and analytical writing) of the Graduate Record Examination (GRE) regardless of their undergraduate records or of the accreditation status of their institutions. For information:
Subject Test is not a requirement, but will accept the scores for review if sent to us.

Institution Code: 1631

All PhD Applicants
Analytical Writing ≥ 3.5

Thesis Master Applicants
               Analytical Writing ≥ 3.5
               Analytical Writing ≥ 4.5


(Required for all International applicants) 

  Institution Code: 1631

  • There are no automatic waivers
  • Department Requirements:
    • Ph.D. Applicants
      • iBT overall score ≥ 80
      • Writing ≥ 18
      • Speaking ≥ 22
      • Listening ≥ 16
      • Reading ≥ 19
    • Thesis Master Applicants
      • iBT overall score ≥ 107
      • Writing ≥ 24
      • Speaking ≥ 26
      • Listening ≥ 22
      • Reading ≥ 22

You can search the Official TOEFL web site for test locations nearest you.

  • IELTS minimum score ≥ 7.5

Additional important points:

Besides your GPA, GRE, and TOEFL scores, the Graduate Admissions Committee will pay considerable attention to two components of the application. First, the research experience of the applicants (e.g., time doing research, specifics on the research projects conducted, output of those projects in terms of oral and poster presentations, papers prepared, submitted, and published, etc.). Second, how the references explain the research skills of the applicant. One of the goals of the Admissions Committee is to determine the potential of the applicants to be excellent research students and think critically and independently. Therefore, we strongly encourage applicants to address thoroughly the essay questions of the application related to research, and to ask for letters of recommendation to people who know well the applicants’ research background.

Admissions Decision Notice Date

Admissions decisions will be announced via e-mail when a decision has been made, no sooner.

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