The Evolution of Molecular Biology
The Search for the Secrets of Life
First Edition
Kensal E. van Holde
Oregon State University, Department of Biochemistry and Biophysics, Corvallis, OR, USA
Jordanka Zlatanova
University of Wyoming, Department of Molecular Biology, Laramie, WY, USA
Copyright
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Preface
Within the past century, a whole new science has arisen, a new way of understanding biology and medicine. The applications of this science, which has come to be called molecular biology , pervade every aspect of our lives today and promise even more in the future. Molecular biology has arisen from roots in biochemistry and geneticshas in fact fused these disciplines to provide an understanding of life at a much deeper level than was hitherto possible (). As is often the case with new science, unexpected applications have arisen and created whole new industries.
In this book, we will depict the rise and flowering of molecular biology. We will not attempt an exhaustive history of the field, nor of those scientists who built it. Instead, we shall concentrate on the development and flow of ideas. We would like to demonstrate the complexity of science, the sudden breakthroughs following decades of confusion, the frequent blind alleys of misconception that tend to hinder progress. We would like to show how some ideas are slowly crafted by teams of careful and dedicated workers, whereas others arise from individual strokes of genius.
Finally, while this is a book about science, we will try to avoid esoteric knowledge and extensive detail, either about scientific procedures or about the scientists themselves. Nevertheless, there is much about those remarkable men and women who created this field that demands telling, and we shall include biographical material where appropriate.
Chapter 1
Beginnings
Abstract
In this chapter, we have, very briefly, sketched the antecedents of molecular biology, from ancient times until about 1800 AD. Despite the long preexistence of atomistic ideas that might have prompted a mechanistic view of biology, the heavy hands of theology and classical tradition resisted progress, even through the renaissance. In particular, the doctrines of vitalism and spontaneous generation inhibited real advances until the 19th century. Their demise, together with the development of the microscope and rational taxonomy, sets the stage for the flowering of biochemistry and genetics during the early years of the 20th century. These, when finally connected, provide the basis for what we call molecular biology.
Keywords
Atoms; Renaissance; Vitalism; Spontaneous generation; Microscope; Taxonomy
Prologue
To this chapter, there is no prologue. It begins with some of the first attempts to explain the world in natural terms. Before, superstition, in a thousand forms, reigned supreme.
Some Ancient Intuitions
The basic precept of molecular biology can be stated quite succinctly: all the myriad forms and processes in living things can be explained in terms of atomic and molecular structures and their interactions with one another. Although that level of understanding has not yet been accomplished (and possibly never will be in view of the extreme complexity of life), we have never yet encountered impassible barriers to that quest. It has come close to realization only in the past century (). Indeed, the very term molecular biology is new. Therefore, it may seem surprising that the basic idea is more than two millennia old. The Greek philosopher Democritus and his colleagues in the 5th century BC proposed a remarkably simple model for the universe. Everythingtables, chairs, the sun, the moon, grass, even human brains and bodieswas proposed to be composed of elementary indivisible particles called atoms . They could not, of course, imagine atoms as we visualize them today, but they correctly guessed that different objects and substances were created by differing combinations of atoms (which combinations we call molecules ). This is the core of modern chemistry and biochemistry. The extrapolation of this idea into biology is the basis for a molecular biology. This new science is changing our basic understanding of living organisms, whether they are unicellular as bacteria or multicellular as plants and animals. As a consequence of this basic knowledge, the world we live in is changing.