Скачать или смотреть USMLE Step 1 First Aid Review + High-Yield MCQs | Lac Operon Explained

In this USMLE Step 1 First Aid page-by-page review, we break down the lac operon — the classic prokaryotic gene regulation model — and explain how it responds to lactose and glucose availability.

🧬 Understand CAP-cAMP activation, repressor proteins, operator sequences, and how this system ties into core Step 1 molecular biology.

💡 Reinforce your understanding with high-yield NBME-style MCQs that test both concepts and exam application.

📘 Based on First Aid for the USMLE Step 1
(2025)
🧠 Perfect for active recall and connecting molecular biology to real exam questions.

✅ Subscribe for the complete First Aid review series, page by page.
💬 Comment your trickiest molecular biology topics for future videos!




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