1. Chromosomes and DNA Replication 12.2

2. Chromatin Granular material visible within the nucleus; consists of DNA tightly coiled around proteins.

3. Histone Protein molecule around which DNA is tightly coiled around chromatin.

4. Replication Copying process by which a cell duplicates its DNA.

5. DNA Polymerase Enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule.

6. Key Concept What happens during DNA replication? During DNA replication, the DNA molecule separates into two strands, and then produces two new complementary strands following the rules of base pairing. Each strand of the double helix of DNA serves as a template, or model, for the new strand.