PHED-2506EL Lecture Notes - Lecture 5: Dna Replication, G2 Phase, G1 Phase
14 Dec 2018
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Lecture 5: cells: the living units part iii. Series of changes a cell goes through from the time it is formed until it reproduces. Interphase: from cell formation to cell division, cell growth: produces proteins and organelles, g1: growth, s: synthesis, g2: growth, mitotic phase, cell division (growth and tissue repair, mitosis, cytokinesis. Interphase: g1: (gap 1 substance, metabolic activity and vigorous growth, g0-cells that permanently stop dividing, s: (synthetic, dna replication, g2: (gap 2 substance, final phase, preparation for division, centriole replication is completed by the end. Dna replication: before, dna must be replicated exactly. Dna replication cell division: proceeds smoothly when newly formed dna is undamaged. If damage occurs cycle stops at g2/m checkpoint resumes once dna repair mechanism has fixed the problem. Replication process: histones associate with dna to complete formation of two new chromatin strands, chromatin strands held together until cell division, then distributed to daughter cells, ensure each cell has identical genetic information.
