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