Key Ideas

1. Life is based on the principles of genetics and evolution. Understanding these principles is crucial to understanding life on Earth.

2. The study of genetics has revealed that all living organisms share a common ancestor. This concept is often referred to as the unity of life.

3. DNA is the molecule that carries the genetic information in all living organisms. It is a double-stranded helix made up of four nucleotide bases: adenine, thymine, cytosine, and guanine.

4. The central dogma of molecular biology describes the flow of genetic information from DNA to RNA to proteins. This proce....
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Quiz