Build a focused plan with exam-level practice. Save $1,200+ in tuition when you pass.
$97
Exam Cost
78 min
Time
3-6
Credits
~50/80
Passing
Students who have seen at least some CLEP Biology material before, need a focused refresh, and want to know what to study next before paying for the CLEP exam.
If this subject is completely new, do not treat "7 days" as a promise. Start with the free resources and wait to schedule until realistic practice is around 70-80%.
Memorizing definitions without practicing application questions, skipping weak units because they feel uncomfortable, and booking before you have taken a timed readiness check.
Confirm your college accepts this CLEP, check the required score, practice the weakest units, then use a mock or diagnostic as your final go/no-go signal.
How these questions are made: practice items are AI-generated, then independently re-solved and checked against deterministic quality gates (answer-key consistency, complete stems, on-blueprint scope). Use PrepLion to find and drill your weak areas — and confirm test-day readiness with official College Board CLEP materials too.
Unit 1: Molecular and Cellular Biology
Unit 2: Genetics and Molecular Biology
Unit 3: Evolution and Diversity
Unit 4: Organismal Biology
Unit 5: Ecology and Population Biology
About these external resources
Links below point to publicly available third-party study materials (Khan Academy, YouTube creators, Modern States, OpenStax, College Board, etc.). PrepLion does not own, host, or modify this content. We list links as a study aid only — each resource is the property of its respective owner and is subject to their terms of service.
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Linked content may be removed, paywalled, or changed by its owner at any time. We make no warranty as to its accuracy, availability, or suitability for any exam.
The best free materials for CLEP Biology. No affiliation, no kickback — just what actually works.
Modern States: Biology
Modern States (College Board partner)Free full video course. Earn the free CLEP voucher after 70% completion.
OpenStax: Biology 2e
OpenStax (free, peer-reviewed)Cell biology, genetics, evolution, ecology — full CLEP scope.
Khan Academy: Biology
Khan AcademyCells, genetics, evolution, physiology.
YouTube: CrashCourse
YouTube40 episodes covering the full CLEP Biology outline.
Amoeba Sisters YouTube
YouTube (student-endorsed)Real test-takers credit Amoeba Sisters for genes/enzymes/cell-process clarity. Watch when a Khan video doesn't click.
Peterson's CLEP Biology practice tests
Peterson's (paid, optional)Multiple paid test-takers reference Peterson's as their final practice. Use only if free options don't get you over the line.
Links open in a new tab. PrepLion has no affiliation with these providers — we just think they're the best free options.
CLEP® is a registered trademark of College Board, which is not affiliated with PrepLion. All practice questions are original content.