Cell Cycle
1st Phase of Mitosis
Prophase
Part of Interphase when DNA replication takes place
S phase
Environmental agents that can cause genetic mutations
Mutagens
Enzyme used to unwind DNA to expose to expose DNA bases
Helicase
Phase that occurs before mitosis
G2
Phase when unreplicated chromosomes pull away from each other
Anaphase
Enzyme that unzips DNA strands
Helicase
Physical substance that causes a mutation
Physical mutagen
these end in -ase
Enzymes
Phase where one cell has two nuclei
Telophase
2 parts of cell cycle
Interphase and Mitosis
Type of replication that produces two new strands of DNA
Conservative
Chemical substance that causes a mutation
Chemical mutagen
Enzyme responsible for joining together into one continuous lagging strand
Ligase
Phase where spindle fibers form
Prophase
Phase when chromosomes line up in the center of the cell
Metaphase
Type of replication that produces one new and one old strand of DNA
Semi-conservative
Living organism that causes mutations
Biological mutations
Synthesized in small fragments going away from the replication fork
Lagging strand
Links each arm of the chromosome
Centromere
Phase that has two new cells with their own nucleus
Cytokinesis
Site that moves down the DNA double helix as the DNA is unzipped
Replication fork
Physical
Short fragment of DNA synthesized on the lagging strand during DNA replication
Okazaki fragments
Mitosis is the nuclear division of _____ cells.
Somatic