1. The mitotic (M) phase of the cell cycle alternates with the much longer interphase. The M phase includes mitosis and cytokinesis. Stages of mitosis prophase metaphase anaphase telophase. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Fig. 12.4

2. The sugar-phosphate backbone. Pairs of nitrogenous bases, connect the chains with hydrogen bonds. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

3. Fig. 12.5 left

4. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Fig. 12.5 right

5. Cytokinesis, division of the cytoplasm. In animals, the first sign of cytokinesis (cleavage) is the appearance of a cleavage furrow Cytokinesis divides the cytoplasm: