 | Study Outline
(See related pages)
- Identification of DNA as the Genetic Material
- Experiments with pneumococcus suggested that DNA is the genetic material
- Hershey and Chase provided evidence that the genetic material injected into the bacterial cytoplasm is T2 phage DNA
- RNA functions as the genetic material in some viruses
- Nucleic acid structure
- Nucleotides are the building blocks of nucleic acids
- Nucleotides are linked together to form a strand
- A few key events led to the discovery of the double helix structure
- Chargaff found that DNA has a biochemical composition in which the amount of A equals T and the amount of G equals C
- Watson and Crick deduced the double helical structure of DNA
- The molecular structure of the DNA double helix has several key features
- DNA can form alternative types of double helices
- DNA can form a triple helix, called triplex DNA
- The three-dimensional structure of DNA within chromosomes requires additional folding and the association with proteins
- RNA molecules are composed of strands that can fold into secondary and tertiary structures
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