BIOL 1070 Study Guide - Midterm Guide: Release Factor, Spermatogonium, Centromere

• School: University of Guelph
• Department: Biology
• Course: BIOL 1070
• Professor: Terry Van Raay

Document Summary

Each mitotic chromosome is comprised of identical sister chromatids. In mitosis, cellular contents (chloroplasts, etc) divide between daughter cells. Centrosome duplicates, chromatin duplicates and condenses, nuclear envelope dissolves, nucleolus dissolves, and microtubules become reorganized by the mtoc (microtubule organizing center) centrosomes are the mtocs in animals. The cell cycle can take 30 minutes to year. Mitosis is the smallest phase of the cell cycle. G1(growth and metabolism), dna synthesis and chromosome duplication, and g2(preparation for mitosis), which are all part of interphase and m phase (mitosis). Cells that are not actively cycling may exit cell cycle at g1 and enter a state called g0 where they are quiescent (state of inactivity). Telomeres: chromosome ends are protected by telomeres telomeres provide three important functions: they resist degradation by dnases, prevent fusion of chromosomal ends, and facilitate replication of the ends of the linear dna.