Where do new cells come from? The Cell Cycle Mystery Standard: BI5. a. Students know the general structures and functions of DNA, RNA, and protein. Standard Explanation-DNA-double helixcontains genetic info, RNA-singlestranded, copy of a section of DNA, protein-make up many parts of the body Objectives: SWBAT… Explain the origin of new cells. Describe the structure and function of DNA. Life Span of Cells Skin cell-two weeks Red blood cell-4 months Liver cell-300-500 days Intestine-(muscle)-16 years How do we get from one cell to many cells? DNA contains the information to make more cells (in the nucleus). The Cell Cycle-DNA is copied and the cell divides. (Mitosis and Cytokinesis) The Cell Cycle Interphase-G1(growth),S(DNA synthesis), G2 (growth) Mitosis-PMAT (Division of cell membrane and nucleus) Cytokinesis-Division of cytoplasm Summary Questions: How often does your body replace cells in your intestines? During which phase do cells go through normal growth? Where is the information contained to make new cells? What occurs during Mitosis?