BIOL 201 Lecture 27: BIOL 201 lecture 27
11 Apr 2018
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Budding yeast (s. cervisiae) propagate by budding. Looking at when the cell knows when to divide. The cell cycle is comprised of: g0 phase: quiescence cells never divide again (ex: neurons, g1 phase, s phase: dna duplication, g2 phase, m phase: mitosis. If you don"t increase cell size, daughter cells will follow a base 2 exponential decay in size. Duplicate dna in s phase: ex: to maintain diploid, haploid status, s-phase was discovered by alma howard (mcgill graduate) Studied cell division in fava bean root tip. Monitor rate of incorporation of radioactive nucleotides in dna when the root tip was incubated with radioactive nucleotides: expected: constant increase of radioactivity, found: saccadic bursts: nothing would happen and suddenly the radioactivity would spike. Conclusion: cells choose to duplicate dna at a specific. Know the size of the cell time. Cells have adapted different strategies to measure otherwise difficult values, such as: volume.
