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BIOL 102 Study Guide - Quiz Guide: Intermediate Filament, Spindle Apparatus, Microfilament


Department
Biology
Course Code
BIOL 102
Professor
Wayne Snedden
Study Guide
Quiz

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The Cytoskeleton
The cytoskeleton determines a cell’s structure and motility (how easy is for the cell to move)
The cytoskeleton anchors and moves!
It anchors membrane proteins etc
It moves components in cell
It moves cell itself
The 3 main (basic) parts of a cytoskeleton
- Microtubules
- Microfilaments
- Intermediate filaments
These 3 parts in terms of size
Microtubules > intermediate filaments> microfilaments
You can tell the size relativity by the name no need to memorize this!
Tubules sound bigger than filaments. Intermediate sounds like inbetween (in the middle)!
Microtubules are used for transportation inside the cell.
The mitotic spindle is what moves chromosomes around. Guess what that’s made of?
Microtubules.
Now, what do you think microtubules made from?
Tubulin.
A globular protein that under certain conditions will polymerize in to long straight filaments.
(MTOC) stand for microtubule organizing center.
Microtubules have + and ends.
The end attatches to the MTOC.
The microtubule grows from the + end.
The centrosome is the major MTOC in animal cells.
Let’s make that clear: the centrosome is made up of a pair of centrioles.
Centrioles necessary to produce cilia and flagella but are not necessary to produce
mictotubules!
Let’s clear something up – cilia and flagella are made from microtubules.
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