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19 Cards in this Set

  • Front
  • Back
griffith
studied transformation through pneumonococus, harmful and harmless cells
Avery, MacLead, McCarty
dna is the transforming agent
Hershey and Chase
experimented with radioactive sulfur and phosphorus by spinning the dna. protein (sulfur) stayed outside, dna (phosphorus) stayed inside.
Chargaff
base pairing A-T, G-C
Franklin and Wilkins
dna is double stranded
Mesleson and Stahl
semiconservative
Watson and Crick
put together the structure of dna
nucleotides
5 carbon sugar, phosphate, nitrogenous base, building blocks
helicase
improves the separation of dna strands during replication
ligase
helps connect segments of dna with covalent bonds, joins okazaki fragments into a 3 to 5 strand, repair, elongation of 5 to 3
primase
synthesizes short segments of rna (primer that starts synthesis of dna)
dna polymerase
involved in synthesizing a new dna strand by elongating it in the 5 to 3 direction ( adds 3 nucleotides on the strand)
genetic code
are the sequences of the nitrogenous bases
transformation
change of phenotype and genotype due to external dna by a cell
phages
viruses that infect bacteria
semiconservative
in replication, you have one old stand and one new replicated strand, there will always be new and old dna
primer
made out of rna
primase
joins rna nucleotides to make the primer
nuclease
dna-cutting enzyme