Master the MCAT® BBLS
with Expert Guidance
The Biological and Biochemical Foundations of Living Systems (BBLS) is the cornerstone of MCAT science. Dr. Donnelly’s Science Passage Buster method gives you the frameworks to decode even the most complex passage-based questions.
Four Disciplines. One Section.
Success in BBLS requires mastery across four heavily integrated disciplines. Understanding the section weighting allows you to build a strategic study plan from day one.
Introductory Biology
The largest portion of BBLS spans cellular biology, genetics, physiology, and molecular biology. Mastering these systems is non-negotiable for a competitive score.
Biochemistry
Covers metabolism, enzyme kinetics, protein structure and function. Questions frequently integrate biological concepts with biochemical mechanisms in a single passage.
Organic Chemistry
A small but present portion focusing on the organic reactions most relevant to biological systems — particularly carbonyl chemistry and its role in metabolic pathways.
General Chemistry
Appears in BBLS to test your understanding of aqueous solutions, acid-base chemistry, and thermodynamics as they apply to living systems and biological reactions.
59 Questions.
95-Minute Window.
The BBLS section combines passage-based reasoning with direct recall. Know the format cold before exam day to avoid wasted time.
Dr. MCAT Pro-Tips:
Beating the Clock
The 95-minute window of BBLS is challenging. Students who master time management consistently outperform those who rely on content knowledge alone.
Master the 3 Foundational Concepts
The Biological and Biochemical Foundations of Living Systems section is built around three Foundational Concepts. These map across molecular, cellular, organ-system, and organismal levels of biology.
Why Choose Private
DrMCAT Tutoring?
Dr. Donnelly combines Oxford-level academic rigour with a proven proprietary system to give students an unfair advantage in BBLS. The focus is always on applied understanding — not rote memorisation.
Proprietary Strategies that Work
Every student receives a personalised roadmap designed to close content gaps and sharpen passage-reading speed. Here’s what you gain:
Ready to Master
the BBLS Section?
Stop guessing and start mastering. The Science Passage Buster gives you the exact frameworks to decode complex biology passages fast — and convert them into points.