Biology Final Review - DNA and RNA

Griffiths experiment

• Studies bacteria that causes pneumonia using mice and concluded that transformation was the reason the bacteria disease was passed on

• made extract from heat killed bacteria and used enzymes that destroyed macromolecules and concluded DNA was transforming factor

• Bacteriophage was virus that infects bacteria and composed of either DNA or RNA and grew viruses in cultures contains radioactive isotopes

• used x ray crystallography and discovered DNA strand were twisted around each other

MAde extract from heat killed bacteria and treated extract with enzymes that destroped lipids, carbs, proteins and nucleic acids separately and concluded DNA was transforming factor

• Gregor Mendal

• Averys experiment

• Griffith

• Hershey and Chase

Hershey and Chase

• Studied bacteria causing pneumonia in mice

• made extract from heat killed bacteria

• Bacteriophage and grew viruses in cultures containing radioactive isotopes

• developed double helix model

Watson and Crick

• Tested bacteria on mice

• used x-ray crystallography and discovered DNa strand were twisted around each other

• Developed the double helix model

• made extract from heat killed bacteria

% of G and C is almost = 30%

% of A and T almost = 20%

• Chargraffs Rules

• Rosalind Franklin

• Darwins Theory

• Watson and Crick

Used X-ray crystallography and discovered DNa strand were twisted around each other

• Chargraffs Rules

• Hershey and Chase

• Rosalind Franklind

• Averys Experiment

Double helix model (select all that apply)

• H bonds formed between nitrogen bases

• completry base pairing

• P-S backbone

• nitrogen bases on inside of helix

• all of the above

Chromosome Structure

• Enzyme

• made of tightly packed protiens and DNA (histones)

• tightly coiled DNA folded many times into chromosome

Where does DNA replication happen

• Mitosis S phase

• Anaphase 1

• Meiosis P phase

• Mitosis P phase

Site where replication occurs

• Replication fork

• Telomeres

• Translation

• Transcription