Biochemistry and Molecular Biology: How Life Works

Book Details

Title	Biochemistry and Molecular Biology: How Life Works
Author(s)	Kevin Ahern, PhD
Publisher	The Teaching Company (The Great Courses)
Year	2019
Edition	First Edition
Language	English
Pages	414
ISBN	978-1-629977-71-3
Genre	Science & Mathematics, Biochemistry, Molecular Biology
Series	The Great Courses
Size	22.49 MB
Extension	PDF

Summary

Biochemistry and Molecular Biology: How Life Works is the official course guidebook for the critically acclaimed Great Courses lecture series of the same name, authored by Professor Kevin Ahern, PhD, a celebrated biochemist and full Professor of Biochemistry and Biophysics at Oregon State University. Published by The Teaching Company in 2019, this 414-page volume serves as the written companion to 36 half-hour video lectures that cover the foundational topics of a first-semester college-level course in biochemistry and molecular biology. What makes this book exceptional is not merely the depth of its content, but its remarkable accessibility — Professor Ahern designed the course and guidebook specifically for learners who have no more science background than high school chemistry, making complex molecular science genuinely comprehensible to a broad audience. The result is a resource that feels less like a dense academic textbook and more like a guided journey through the chemical logic that underpins every living thing on Earth.

The guidebook spans a sweeping range of topics that collectively illuminate the molecular foundations of life. Early sections introduce the chemistry of water and its critical role as the medium of biological reactions, before moving into the structure and function of amino acids, proteins, and enzymes — the master molecules that catalyze virtually every chemical process in living cells. Subsequent chapters explore carbohydrates and fats as both energy sources and structural materials, explain the elegant biochemistry of ATP as the universal energy currency of cells, and trace the pathways of cellular respiration including glycolysis, the citric acid cycle, and oxidative phosphorylation. The second half of the book transitions into molecular biology, examining the structure of DNA and RNA, the mechanisms of gene expression — transcription and translation — and the sophisticated regulation of gene activity, culminating in discussions of the microbiome, hormones, neurotransmitters, antioxidants, and the biochemistry of aging and disease.

One of the most distinctive strengths of this guidebook is the way it continuously bridges abstract molecular concepts with tangible, everyday phenomena. Professor Ahern draws recurring connections between what happens at the subcellular level and what readers experience in their own bodies — explaining, for instance, how the biochemistry of glucose metabolism explains why we feel energized after eating, how enzyme kinetics underpin the action of the medications we take, or how the molecular structure of neurotransmitters determines mood and cognition. The 36-lecture format — each corresponding to a chapter or section in the guidebook — creates a natural rhythm of learning, with each unit building logically on the last. Readers working through the PDF independently will find the structured progression of topics, rich explanatory diagrams, and clear prose sufficient to follow even without the accompanying video lectures, making the guidebook a self-contained educational resource in its own right.

The primary audience for this book is the intellectually curious adult learner who wishes to understand how life works at the molecular level without enrolling in a formal university course. Health-conscious readers seeking to understand the biochemistry behind nutrition, disease, pharmacology, and aging will find the content directly relevant to their everyday lives. Pre-university students preparing for biology or chemistry courses will benefit from the conceptual grounding it provides, while working professionals in health-adjacent fields — nurses, dietitians, fitness professionals, and science communicators — will find it an invaluable reference for deepening their scientific literacy. The book is also well-suited for lifelong learners enrolled in OLLI (Osher Lifelong Learning Institute) programs, where the Great Courses series has been widely used as a group study resource.

This guidebook stands as a testament to Professor Ahern's decades-long mission to make biochemistry accessible, engaging, and genuinely exciting to anyone willing to explore it. Having amassed over five million views on his freely posted lecture recordings on YouTube, and having earned Oregon State University's highest teaching recognition — the Elizabeth P. Ritchie Distinguished Professor Award — Professor Ahern brings to this guidebook the same pedagogical ingenuity that has defined his entire career. The course has received outstanding reviews from the Great Courses community, with readers consistently praising the clarity of explanation, the breadth of topic coverage, and the ability to make one of science's most complex disciplines feel approachable and rewarding. For anyone who has ever wondered what life is made of and how it all works, this book is an ideal place to find out.

Key Features

• Serves as the comprehensive written guidebook for a 36-lecture Great Courses video series, covering the equivalent of a full first-semester college biochemistry and molecular biology course.
• Requires no more science background than high school chemistry, making it genuinely accessible to adult learners, science enthusiasts, and non-specialists.
• Covers the full arc of biochemistry from the chemistry of water and amino acids through proteins, enzymes, carbohydrates, fats, and cellular energy metabolism including glycolysis and the Krebs cycle.
• Transitions seamlessly into molecular biology, addressing DNA structure, RNA types, transcription, translation, gene regulation, and epigenetics.
• Explores applied topics including the biochemistry of hormones, neurotransmitters, antioxidants, the human microbiome, and the molecular basis of aging.
• Continuously bridges molecular science to everyday human experience, explaining how cellular biochemistry connects to nutrition, medication, exercise, and disease.
• Authored by a multiple award-winning educator whose innovative teaching methods — including mnemonic songs, limericks, and technology integration — have transformed biochemistry education at Oregon State University and beyond.
• Structured in 36 clearly delineated units that build progressively on one another, allowing readers to follow the material systematically or use specific chapters as standalone references.
• Functions as a self-contained educational resource that can be studied independently of the video lectures, supported by clear explanatory prose and illustrative content throughout.
• Reflects content accuracy and depth consistent with a formal university course, while maintaining a tone and pace calibrated to adult lifelong learners rather than examination-driven students.
• Covers the biochemistry of ATP synthesis in exceptional detail, tracing energy transformation across multiple metabolic pathways and explaining the molecular mechanisms of oxidative phosphorylation.
• Addresses the molecular biology of genetic diseases, mutations, and cancer, connecting fundamental concepts to clinically relevant health topics that resonate with a general audience.
• Part of The Great Courses series, one of the most respected continuing education platforms in the United States, ensuring production quality and academic rigor in all published materials.

About the Author

Kevin Gene Ahern, PhD, was born in 1954 in Quincy, Illinois, and pursued his undergraduate education at Oklahoma State University, where he earned a Bachelor of Science degree in Zoology in 1976. After working as a research technician studying vitamin A metabolism, he returned to Oklahoma State to complete a Master of Science degree in Biochemistry in 1981, before transferring to Oregon State University (OSU), where he earned his PhD in Biochemistry and Biophysics in 1986. He subsequently joined the OSU faculty, where he has served in the Department of Biochemistry and Biophysics since the mid-1990s, eventually being promoted from Senior Instructor to full Professor in 2014. At OSU, Professor Ahern became widely recognized for his innovative, unconventional approach to teaching — pioneering the use of humor, songs he calls "Metabolic Melodies," limericks, and early internet technologies to make biochemistry engaging and memorable for thousands of undergraduate and graduate students. He received OSU's highest teaching recognition, the Elizabeth P. Ritchie Distinguished Professor Award, among numerous other honors for his contributions to science education.

Beyond the classroom, Professor Ahern has pursued an extraordinarily prolific career as an author, science communicator, and educational media producer. He is a co-author of the widely used Mathews, Van Holde, and Ahern Biochemistry textbook published by Addison-Wesley Longman in 2000, as well as three open-access educational books co-written with his wife, OSU Senior Instructor Indira Rajagopal: Biochemistry Free and Easy, Biochemistry Free For All, and Kevin and Indira's Guide to Getting Into Medical School — all available freely online. He served as a Contributing Editor for Science Magazine, BioTechniques, and Genetic Engineering News for a combined span of over 25 years, and for 12 years as Editor of the Biotechnology Software and Internet Journal. He has posted his biochemistry lectures freely on YouTube, accumulating over five million views, and produced over 170 instructional videos for the medical education platform Lecturio. His most recent major project — the Great Courses series Biochemistry and Molecular Biology: How Life Works — represents the culmination of his lifelong commitment to bringing rigorous molecular science to the widest possible audience. Professor Ahern is currently Professor Emeritus at Oregon State University.

Related Books

• Biochemistry Free For All — Kevin Ahern, Indira Rajagopal & Taralyn Tan
• Biochemistry (3rd Edition) — Christopher K. Mathews, Kensal E. Van Holde & Kevin Ahern
• Lehninger Principles of Biochemistry — David L. Nelson & Michael M. Cox
• Harper's Illustrated Biochemistry — Victor W. Rodwell, David A. Bender & Kathleen M. Botham
• Molecular Biology of the Cell — Bruce Alberts, Alexander D. Johnson & Julian Lewis
• Biochemistry (9th Edition) — Jeremy M. Berg, John L. Tymoczko & Gregory J. Gatto
• The Molecules of Life: Physical and Chemical Principles — John Kuriyan, Boyana Konforti & David Wemmer
• Molecular Biology: Principles and Practice — Michael M. Cox, Jennifer Doudna & Michael O'Donnell

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Frequently Asked Questions

Q : Is this book a standalone textbook or does it require the accompanying video lectures to be useful?

R : While the guidebook was conceived as the written companion to Professor Ahern's 36-lecture Great Courses video series, it functions effectively as a standalone educational resource. The text is written in a clear, explanatory style with sufficient depth and detail that readers who study it independently — without access to the videos — can still gain a comprehensive understanding of biochemistry and molecular biology. Each of the 36 sections is self-contained yet logically connected to those before and after it, making independent reading straightforward. Readers who wish to maximize their learning experience can, of course, use both the PDF and the video lectures together for a richer, multimedia educational experience.

Q : What level of prior scientific knowledge is required to read this guidebook?

R : The guidebook was specifically designed to require no more science background than a standard high school chemistry course, making it accessible to a very broad audience. Professor Ahern introduces each major concept from first principles, ensuring that readers without university-level biology or organic chemistry can follow the material without feeling lost. That said, readers who do have some prior exposure to biology or chemistry will find the content moves at a rewarding pace that deepens and contextualizes what they already know. The book is therefore equally valuable for complete beginners and for those with partial scientific backgrounds seeking to strengthen their understanding of molecular biology.

Q : How does the content of this guidebook compare to a standard university biochemistry textbook?

R : This guidebook covers broadly the same conceptual territory as a first-semester university biochemistry course — amino acids, proteins, enzymes, carbohydrates, lipids, nucleic acids, metabolic pathways, gene expression, and cell signaling — but differs fundamentally in depth, tone, and purpose. A standard university textbook such as Lehninger or Stryer is designed to support examination preparation and contains exhaustive mechanistic detail, quantitative problem sets, and extensive reference material that can run to over 1,000 pages. Professor Ahern's guidebook, by contrast, prioritizes conceptual clarity, real-world connection, and reader engagement over exhaustive coverage, making it ideal for understanding the big picture of biochemistry without the cognitive overload of a traditional academic text. Serious students preparing for university examinations should supplement this guidebook with a dedicated biochemistry textbook.

Q : Does the guidebook address molecular biology topics in addition to biochemistry proper?

R : Yes — the second major half of the guidebook is devoted entirely to molecular biology, covering the structure and replication of DNA, the mechanisms of transcription and translation, the regulation of gene expression, epigenetic modifications, and the role of non-coding RNAs. Professor Ahern explains the central dogma of molecular biology — the flow of genetic information from DNA to RNA to protein — in accessible detail, including how mutations, gene regulation, and genetic engineering all arise from the same underlying molecular logic. The molecular biology sections are presented as a natural extension of the biochemistry content, since protein synthesis and gene regulation ultimately depend on the same chemical principles introduced in the earlier chapters. This integrated approach gives readers a unified view of the molecular basis of life rather than treating biochemistry and molecular biology as entirely separate disciplines.

Q : What applied health topics does the guidebook cover beyond core biochemistry?

R : Professor Ahern dedicates considerable attention to the real-world health applications of biochemistry throughout the guidebook, addressing topics that resonate directly with everyday human health and wellbeing. These include the biochemistry of hormones and how they regulate metabolism and reproduction, the molecular basis of neurotransmitter function and its relationship to mood, cognition, and psychiatric medications, and the chemistry of antioxidants and their role in preventing cellular damage. The book also discusses the human microbiome and its biochemical interactions with the host, the molecular mechanisms underlying aging and age-related disease, and how the principles of enzyme kinetics explain the action of common pharmaceuticals. These applied sections make the guidebook particularly valuable for readers in health-adjacent professions or those interested in the science behind nutrition, medicine, and lifestyle choices.

Q : How is the Great Courses series — and this guidebook specifically — structured in terms of lecture and chapter organization?

R : The course and its accompanying guidebook are organized into 36 individual lectures, each corresponding to approximately 30 minutes of video content and a dedicated chapter or section of the written guide. The lectures are sequenced to build knowledge progressively — beginning with the chemistry of water and small molecules, advancing through the macromolecules of life, moving into metabolic pathways and energy transformation, and concluding with the molecular biology of genes and their regulation. This modular structure means readers can engage with the guidebook in order from beginning to end, or dip into specific sections as reference material on particular topics. The 36-lecture format also makes the course well-suited to group study programs such as OLLI (Osher Lifelong Learning Institute), where it has been adopted at multiple universities across the United States.

Q : What teaching awards and recognitions has Professor Kevin Ahern received that speak to the quality of this guidebook?

R : Professor Ahern is one of the most decorated educators in the history of Oregon State University's science faculty. He received the Elizabeth P. Ritchie Distinguished Professor Award, OSU's highest recognition for teaching excellence, in addition to numerous college-level and department-level teaching honors over his career spanning more than two decades on the OSU faculty. His innovative teaching methods — including the creation of Metabolic Melodies (biochemistry concepts set to popular song melodies), humorous limericks as mnemonic devices, and among the earliest uses of internet-based lecture delivery beginning in 1995 — have influenced both students and fellow educators nationally. His YouTube lecture channel has surpassed five million views, and his open-access biochemistry textbooks have been adopted by students and instructors worldwide, all of which speaks directly to the pedagogical effectiveness that readers of this guidebook will experience.

Q : Is this guidebook suitable for pre-medical students as part of their MCAT or medical school preparation?

R : This guidebook is an excellent conceptual foundation for pre-medical students, particularly in the early stages of building their biochemistry knowledge base. Professor Ahern himself has extensive experience advising pre-medical students at Oregon State University and has co-authored a dedicated guide for medical school applicants, so the educational framework he brings to this book is deeply informed by the needs of that audience. For MCAT preparation specifically, this guidebook covers many of the biochemistry and molecular biology topics tested on the exam, including enzyme kinetics, metabolic pathways, DNA replication, and gene expression, though students preparing intensively for the MCAT should supplement it with dedicated exam preparation materials that include practice questions and quantitative problem-solving. As a conceptual primer and source of clear mechanistic understanding, however, this book provides an invaluable complement to more exam-focused resources.