Scientists And DNA Structure Flashcards
Who was Frederick Griffith and what was his experiment?
1928, a British Microbiologist and he injected a mouse with
smooth cells and it died
Rough it lived
Mixed it died
What did Frederick Griffith conclude?
He concluded that the harmless bacteria was transformed into a harmful bacteria by a chemical compound.
Who were Avery, McCarty and Macleod and what was there experiment.
1944, American Scientists
They tested each of the four organic compounds to find out which one was responsible for the transformation.
What was Avery, McCarty and Macleod conclusion?
The molecule that carries heritable information is DNA
Who was Erwin Chargaff and what was his rule?
1950, Austrian scientist.
1:1 ratio of adenine to thymine and guanine to cystosine
%Thymine=%Adenine
%Guanine=%Cystosine
Who was Hershey and Chase and what was their experiment?
1952, American scientists
They used radioactive isotopes to label the proteins and DNA
What was Hershey and Chases conclusion?
They concluded the DNA is the chemical of inheritance.
Who was Rosalynn Franklin and what was her accomplishment?
She took photo 51 which is a short x-ray diffraction photo of the DNA
1952 British scientist
What are Watson and Crick known for?
1953
Won the novel prize for their DNA model
What did the human genome project achieve?
It was a worldwide scientific effort and the primary goal was to determine the sequence of the 3 billion nucleotides to make up the human genome
Does DNA stand for?
Deoxyribonucleic acid
What are the three parts of a nucleotide?
Phosphate, deoxyribose(sugar), nitrogenous base(ACGT)
Which nucleotides are purines?
Adenine and Guanine
Which nucleotides are pyrimidines?
Cystosine and Thymine
The bonds on long the sides or backbone or strong ………….bonds
Covalent
