Week 3 Discussion Bio 93 Summer Session 1

The Cell Cycle Cell division enables an organism to develop from a single cell Continues to aid in the renewal and repair of fully grown eukaryotes Different steps have their own checkpoints A dividing cell replicates its DNA, moves each copy to opposite ends of the cell, and splits into daughter cells

The Cell Cycle Mitotic (M) Phase Interphase Mitosis & Cytokinesis G1 → S Phase → G2 Mitosis: division of the genetic material in the nucleus Cytokinesis: division of the cytoplasm Shortest part of the cell cycle Duplication of chromosomes is specific to the S phase Accounts for ~90% of the cycle A cell grows (G1), continues to grow as it copies its chromosomes (S), grows more as it completes preparations for cell division (G2), and divides (M).

Telophase & Cytokinesis The Cell Cycle Prophase Prometaphase Metaphase Anaphase Telophase & Cytokinesis What are the different steps involved in the cell cycle and what happens as each step?

The Cell Cycle https://mediaplayer.pearsoncmg.com/assets/whoEuNdde6Tbv_RiGlNAJdotLaHb2CvU

Cancer

What do normal cells need to grow? Growth Factors Surfaces and Space

DNA Replication List the different components necessary and the process by which DNA is replicated.

DNA Structure and Replication https://mediaplayer.pearsoncmg.com/assets/_SBpDyyv0FfgdmC2W6IoTLxWQp3MzETp

DNA Structure Pyrimidine Purines

DNA Structure

DNA Organization

DNA Accuracy DNA polymerase proofreads every base it adds Ensures the correct base is added Not always accurate Mismatch repair checks for errors in DNA