Skip to main content
We’re so back. See what’s new for the 2026-2027 school year →

🧬ap biology review

Repressors in AP Biology

Verified for the 2027 exam
Verified for the 2027 exam•Fiveable Content Team

Definition

Repressors are proteins that suppress the transcription of a gene. They bind to specific DNA sequences, preventing RNA polymerase from initiating transcription and thus inhibiting gene expression.

This definition is part of Fiveable's AP Biology review, which also has guided practice questions.

AP course connection

Topic 6.6: Gene Expression and Cell Specialization

Review this concept in the study guide

Unit 6

See every topic in this unit

Repressors cheat sheet

Visual study aid for homework and review

"Repressors" also found in:

Keep studying AP Biology

Connect this key term to the AP exam workflow: review the course, practice questions, and check related study tools.

AP Biology hub

Review units, study guides, and course resources.

AP-style practice

Check this vocabulary in multiple-choice context.

FRQ practice

Apply key concepts in written AP responses.

Score calculator

Estimate the exam score you are working toward.

Cheatsheets

Review the highest-yield facts before practice.

Practice exam

Put the full course together before test day.