Bio 273 Chapter 11
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Took X-ray diffraction pictures used in constructing the structure of DNA.
Wilkins and Franklin
Determined that DNA contains nitrogenous bases.
Identified DNA as the genetic material in bacteriophage
Hershey and Chase
Discovered regularity in the ratios of different bases in DNA.
Determined that DNA is responsible for transformation in bacteria.
Avery, MacLeod, and McCarty
Worked out the helical structure of DNA by building models.
Watson and Crick
Discovered that DNA consists of repeating nucleotides.
Determined that DNA is acidic and high in phosphorous.
Conducted experiments showing that RNA can serve as the genetic material in some viruses.
Demonstrated that heat-killed material from bacteria can genetically transform live bacteria.
Genetic Material must:
- Contain Complex Info
- Replicate Faithfully
- Encode Phenotype
3 forms of DNA
- A form (when in less water)
- B form (common)
- Z form (left handed)
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