It is one of the more striking generalizations of biochemistry - which surprisingly is hardly ever mentioned in the biochemical textbooks - that the twenty amino acids and the four bases, are, with minor reservations, the same throughout Nature.
Interpretation
Biochemistry reveals a fundamental similarity in building blocks across all life forms.
This quote by Francis Crick highlights a significant and often overlooked fact about biochemistry: the twenty amino acids and four nucleotide bases that form the foundation of all living organisms are remarkably consistent across different forms of life. This universality suggests a common ancestry and fundamental biochemical processes that unite diverse species in the complexity of life.
In practice
In a presentation on the commonality of life forms, you might reference this quote to illustrate biochemical unity.
One can say, looking at the papers in this symposium, that the elucidation of the genetic code is indeed a great achievement. It is, in a sense, the key to molecular biology because it shows how the great polymer languages, the nucleic acid language and the protein language, are linked together.
Exact knowledge is the enemy of vitalism.
A theory should not attempt to explain all the facts, because some of the facts are wrong
It is essential to understand our brains in some detail if we are to assess correctly our place in this vast and complicated universe we see all around us.
To produce a really good biological theory one must try to see through the clutter produced by evolution to the basic mechanisms lying beneath them, realizing that they are likely to be overlaid by other, secondary mechanisms. What seems to physicists to be a hopelessly complicated process may have been what nature found simplest, because nature could only build on what was already there.
It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material.
The idea that there could be other universes out there is really one that stretches the mind in a great way.
Physics has a history of synthesizing many phenomena into a few theories.
As was predicted at the beginning of the Human Genome Project, getting the sequence will be the easy part as only technical issues are involved. The hard part will be finding out what it means, because this poses intellectual problems of how to understand the participation of the genes in the functions of living cells.
HOMOEOPATHY, n. A school of medicine midway between Allopathy and Christian Science. To the last both the others are distinctly inferior, for Christian Science will cure imaginary diseases, and they can not.
There's a misconception that survival of the fittest means survival of the most aggressive. The adjective 'Darwinian' used to refer to ruthless competition; you used to read that in business journals. But that's not what Darwinian means to a biologist; it's whatever leads to reproductive success.
Science is not a substitute for common sense, but an extension of it.
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