A chemical found in the nucleus. DNA. What was the name of the scientist who worked with mice, and what did he discover? .
Griffiths (1928): – he studied pneumonia in mice- he heated a deadly strain of pneumonia, injected it into the mice and they lived - the mice inherited material that transformed them permanently-he discovered that bacteria is capable of transferring genetic information
That DNA causes death NOT protein in viruses, and DNA is the genetic material that is responsible for being passed from one generation to the next.
1- it is not living2- it is not made up of cells3 - it needs a host to reproduce4 – it injects DNA into a host cell and “hijacks” a cell’s function5 – they cannot survive on their own
Hershey and Chase (1952) by using radioactive materials to track a virus’ movement-protein never got into a cell-DNA was injected by the virus into the nucleus of a cell and took it over
Both are polymers:Deoxyribonucleic Acid – double helix that contains genetic codes to make RNARibonucleic Acid – 1/2 ladder that contains codes to sequence amino acids to make proteins (picture on next slide)
What is it called when nucleotides are held together by covalent bonds that connect the sugar of one nucleotide to the phosphate group of another nucleotide
A complex of enzymes called helicase “unzip” the base pairs- this occurs very quickly and accurately, and always with the original set of DNA
During DNA copying the two strands of the helix separate. Each single strand acts as a “negative” producing a new complimentary strand. What is this called?