| A | B |
|---|
| vaccine | material and that is introduced into a body to produce immunity |
| virulent | microorganism or virus that causes disease |
| transformation | the transfer of genetic dna material from one cell to another |
| bacteriophage | a virus that infects bacteria |
| double helix | the spiral staircase structure of the dna molecule |
| nucleotide | the basic subunit of dna or rna |
| deoxyribose | a five carbon sugar that is part of dna nucleotides |
| base pairing rules | a purine on one strand always pairs with a pyrimidine on the opposite strand |
| complementary base pair | the nucleotide bases in one strand of dna rna that are paired with those of another strand |
| dna replication | the process of making a copy of dna |
| dna helicase | an enzyme that unwinds the dna double helix during dna peplication |
| replication fork | a y shaped point that results when the two strands of a dna double helix seperate |
| dna polymerase | an enzyme that catalyzes the formationof the dna molecule during dna replication |
