BIOLOGY 1A03 Study Guide - Final Guide: Adult Stem Cell, Embryonic Stem Cell, Hayflick Limit

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Rosa Da Silva

Document Summary

Cell turnover: a normal process in our bodies. Older differentiated cells die and need to be replaced through cell division of adult stem cells. Tissue homeostasis: generate new cells at the same rate that cells are lost. Telomere: protective cap found at the end of chromosomes, which is a structure found in the nucleus of a cell that contains deoxyribonucleic acid (dna) Telomeres are non- coding sequences of nucleotides that protects coding genes. Telomere is a code/ special nucleotide sequence of repetitions of one short nucleotide sequence that helps to protect the loss of genetic information during replication of linear. Dna in eukaryotic cells that restrains aging and diseases. Become shorter and weaker after every cell division. Overtime telomeres shorten and cell division stops. Telomere shortening does not occur in gametes or in stem cells or bacterial cells as bacterial cells have circular dna so that the dna never shortens after replication.