Biochemistry: The Molecular Basis of Life

Citation

McKee, T., & McKee, J. R. (2020). Biochemistry: The Molecular Basis of Life (7th ed.). Oxford University Press.

Chapter Summary

The seventh edition is a hardback of about 940 pages in nineteen chapters. Oxford describes it as an intermediate, one-semester text for students on degree pathways in chemistry, biology and the health and life sciences who need a solid introduction to biochemistry without specializing in it, aimed at students who have taken one unit of organic chemistry. The publisher stresses three things: a balance between chemistry and biology, with biochemical principles set in the context of cell physiology and biomedicine; an emphasis on problem solving; and applications in health, agriculture, engineering and forensics. The chapter sequence is classical: foundations, then molecules and enzymes, then a long run of metabolism, and finally nucleic acids and the flow of genetic information.

Chapters 1–4: Biochemistry: An Introduction; Living Cells; Water: The Matrix of Life; Energy

Four foundation chapters precede any biomolecule in detail. After an introductory chapter, the book gives a whole chapter to the structure of living cells, consistent with the publisher's stress on placing biochemistry in the physiology of the cell, and then separate chapters to water and to energy, the thermodynamic ground for the metabolic chapters.

Chapters 5–6: Amino Acids, Peptides, and Proteins; Enzymes

Protein structure and function come next, followed by enzymes. These are the chapters on which every later pathway depends.

Chapters 7–8: Carbohydrates; Carbohydrate Metabolism

Carbohydrates are the first class of biomolecule treated as a pair: a chapter on structure, then a chapter on metabolism, which leads into the chapters on aerobic energy generation.

Chapters 9–10: Aerobic Metabolism I: The Citric Acid Cycle; Aerobic Metabolism II: Electron Transport and Oxidative Phosphorylation

Aerobic metabolism is split over two chapters: the citric acid cycle, then electron transport and oxidative phosphorylation.

Chapters 11–12: Lipids and Membranes; Lipid Metabolism

Lipid structure is treated together with biological membranes, then lipid metabolism follows, repeating the structure-then-metabolism pattern of Chapters 7–8.

Chapter 13: Photosynthesis

A full chapter on photosynthesis, placed after the chapters on aerobic energy metabolism, electron transport and membranes. The companion site's supplementary essays for this chapter include starch and sucrose metabolism and crassulacean acid metabolism.

Chapters 14–15: Nitrogen Metabolism I: Synthesis; Nitrogen Metabolism II: Degradation

Nitrogen metabolism is divided into a chapter on biosynthesis and a chapter on breakdown. The companion site's supplementary essays attached to these chapters (essential amino acids, nucleotide and heme biosynthesis, the catecholamines, hyperammonemia, gout) indicate the range of molecules involved.

Chapter 16: Integration of Metabolism

A chapter on how the separate pathways of Chapters 8–15 are coordinated, the point at which metabolism is viewed as a whole.

Chapters 17–19: Nucleic Acids; Genetic Information; Protein Synthesis

The book ends with molecular biology: the structure of nucleic acids, the handling of genetic information, and the synthesis of proteins.

Key Concepts

Foundations (Chapters 1–6)

• Living cells: the structural context within which the book places biochemical processes.
• Water: the medium of life, given its own chapter.
• Energy: the thermodynamic basis for understanding metabolic pathways.
• Proteins and enzymes: the structure of amino acids, peptides and proteins, and the catalysts that drive biochemical reactions.

Metabolism (Chapters 7–16)

• Carbohydrate metabolism: the pathways by which sugars are broken down and used.
• Citric acid cycle: the central aerobic pathway of energy metabolism.
• Electron transport and oxidative phosphorylation: how aerobic cells capture energy.
• Lipids and membranes: lipid structure and the membranes lipids form, followed by lipid metabolism.
• Photosynthesis: the capture of light energy, treated in a dedicated chapter.
• Nitrogen metabolism: the synthesis and degradation of nitrogen-containing molecules.
• Integration of metabolism: how separate pathways are coordinated in the organism.

Genetic information (Chapters 17–19)

• Nucleic acids: the structure of DNA and RNA.
• Genetic information and protein synthesis: how information stored in nucleic acids is maintained and expressed as protein.

Critical Analysis

Strengths

• Biology and chemistry kept in balance. The publisher's main claim for the book is its balance between chemistry and biology and its habit of placing biochemical principles in the context of cell physiology and biomedical applications. The structure supports this: a whole early chapter on living cells, and a closing chapter on the integration of metabolism.
• Paced for students who are not specializing. The book is written for students in chemistry, biology and the health sciences who need biochemistry as part of a wider degree. Separate foundation chapters on water and energy, and the split of aerobic and nitrogen metabolism into two chapters each, spread demanding material over more, smaller units.
• Unusually complete coverage of metabolism for its level. Photosynthesis and nitrogen metabolism both receive full chapters, which suits students of plant science, agriculture or general biology as well as health-science students.
• Applications and supporting resources. The publisher emphasizes problem solving and applications in health, agriculture, engineering and forensics. The Oxford Learning Link companion site adds, for students, chapter review quizzes, animation and video guides, molecular models, short "Biochemistry in Perspective" and "Biochemistry in the Lab" essays, and a general and organic chemistry review primer.

Limitations

• Too long for its stated course. At about 940 pages, the book holds more than a single semester can cover, and instructors and students must select chapters.
• Organic chemistry assumed. The publisher aims it at students with one unit of organic chemistry. Students without that background will need the companion site's primer or a revision source before the enzyme and metabolism chapters.
• Molecular biology at the end and compact. Nucleic acids, genetic information and protein synthesis occupy only the last three chapters, so courses that want to begin with information flow, or treat it in depth, will need to reorder or supplement.

Where It Fits in the Course

Within this biochemistry course list, McKee and McKee sits between the short introductions and the full major-level textbooks. Mark Lorch's Biochemistry: A Very Short Introduction and David Goodsell's illustrated The Machinery of Life are non-technical starting points that make a good preview. Pratt and Cornely's Essential Biochemistry is the closest alternative: a concise one-semester first course with a strong focus on problem solving and clinical connections. Choose McKee for wider coverage of metabolism (including photosynthesis) and its cell-physiology framing, Pratt and Cornely for a more compact book; Biochemistry: A Short Course, derived from Berg, Tymoczko and Stryer, is a third one-semester option.

For students continuing in biochemistry, the next step is a full text: Voet, Voet and Pratt's Fundamentals of Biochemistry, Appling, Anthony-Cahill and Mathews's Biochemistry: Concepts and Connections, Miesfeld and McEvoy's Biochemistry (which ties pathways to physiology and disease), or the comprehensive Lehninger Principles of Biochemistry and Berg's Biochemistry. Kuriyan, Konforti and Wemmer's The Molecules of Life and McMurry and Begley's The Organic Chemistry of Biological Pathways deepen the physical-chemistry and reaction-mechanism sides that McKee covers more briefly.

How to Use This Book

The book suits second-year students in biology, chemistry, nutrition, agriculture, pre-medical and other health programmes who take one biochemistry course. Before starting, students should have general chemistry and one unit of organic chemistry; those who are rusty should work through the chemistry review primer on the companion site first.

A practical one-semester plan:

• Foundations: Chapters 1–6. Chapters 3 (water) and 4 (energy) can be read quickly by chemistry students but should not be skipped, since the metabolic chapters rely on them. Chapters 5 and 6 on proteins and enzymes are essential.
• Core metabolism: Chapters 7–10 and 16, carbohydrates, aerobic metabolism and the integration of metabolism. Read Chapter 16 after whichever pathways the course covers, as a summary.
• Choose by programme: Chapters 11–12 (lipids and membranes) for health sciences; Chapter 13 (photosynthesis) for plant and agricultural sciences; Chapters 14–15 (nitrogen metabolism) where amino acid metabolism is examined.
• Information flow: Chapters 17–19 if the course includes molecular biology; otherwise leave them for a separate molecular biology course.

Work problems for each chapter studied and use the companion site's review quizzes to check understanding. Draw each pathway from memory, then check it against the book, before moving on to the next.