| A | B |
|---|
| transformation | process in which one strain of bacteria is charged by a gene or genes from another strain of bacteria |
| bacteriophage | virus that infects bacteria |
| nucleotide | monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base |
| base pairing | principle that bonds in DNA can form only between adenine and thymine and between guanine and cytosine |
| chromatin | one of two identical "sisters" parts of a duplicated chromosome |
| histone | globular protein molecule around which DNA is tightly coiled in chromatin |
| replication | copying process by which a cell duplicates its DNA |
| DNA polymerase | enzyme that "proofreads" new DNA strands, helpng to ensure that each molecule is a nearly perfect copy of the origninal DNA |
