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Lecture

Lecture 24

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Department
Chemistry
Course
CH110
Professor
Louise Dawe
Semester
Fall

Description
Biology November 20, 2013 Cell growth and division (and their coordination) - Chapter focuses on interplay between three cellular processes: 1) Dna replication 2) Cytoskeleton dynamics 3) Cell cycle “checkpoints” Cell growth & Division - All cells originate from pre-existing cells through the process of cell division - Important for o Increasing population size (single-celled organisms) o Growing new tissues (e.g. new leaves during plant development) o Asexual reproduction o Replacement of lost cells (lining of gut) and/or damaged cells (wound repair) 8.2 The Cell Cycle in Prokaryotic Organisms - Replication occupies most of the cell cycle in rapidly dividing prokaryotic cells - Replicated chromosomes are distributed actively to the halves of the prokaryotic cell - Mitosis has evolved from an early form of binary fission Binary Fission - Prokaryotic cells undergo a cycle of binary fission involving coordinated cytoplasmic growth, DNAreplication, and cell division, producing two daughter cells from an original parent cell - It begins at a single site called the origin of
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