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AP Biology 2010-2011
Tour of the Cell 3
AP Biology
Cells gotta work to live! What jobs do cells have to do?
make proteins proteins control every
cell function make energy
for daily life for growth
make more cells growth repair renewal
AP Biology 2010-2011
Making New Cells
AP Biology
Cytoskeleton Function
structural support maintains shape of cell provides anchorage for organelles
protein fibers microfilaments, intermediate filaments, microtubules
motility cell locomotion cilia, flagella, etc.
regulation organizes structures
& activities of cell
AP Biology
actin microtubule nuclei
Cytoskeleton
AP Biology
Centrioles Cell division
in animal cells, pair of centrioles organize microtubules spindle fibers
guide chromosomes in mitosis Found in an area called the centrosome
AP Biology
External Structures Cilia
Numerous, short hair-like structures
Flagella One or two per cell, long-whip
like tail Structure of both are the same!
Two single microtubules surrounded by a ring of 9 microtubules. Called a 9+2 arrangement
AP Biology
AP Biology 2010-2011
Any Questions??