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BIOL 1101 Exam Two

In-Class Notes, Cytoskeleton

QuestionAnswer
How does vesicle formation happen Coat components aggregate to donor compartment by binding to G protein, another G protein undergoes shape change and separates budding vesicle from donor compartment
How does vesicle fusion happen Rab protein leads vesicle to destination, where V-SNARE and T-SNARE protein leads to fusions of the vesicle to the target compartment, move through fibers of cytoskeleton
What are microfilaments and their function muscle contraction, motility, two strands intertwined
What are intermediate filaments and their function fiber wound into thicker strands, maintains cell shape by resisting tension
What are microtubules and function maintain cell shape by resisting compression, movement of chromosomes during cell division
Which filaments are dynamic microfilaments (actin) and microtubules (tubin), monomers assemble and disassemble easily
What is g-actin globular actin, monomer units
What is f-actin fibrillar actin, polymeric units
How does actin assemble actin bound to ATP, polymerize with the + end of microfilmanet
How does actin disassemble actin bound to ADP, dissociate from other monomers, occurs at - end
How does microtubule assemble beta-tubulin bound to GTP, dimers polymerize
How does microtubule disassemble beta-tubulin bound to GDP, microtubule comes apart
What is different about microtubules compared to microfilmants in terms of assembly microtubules can grow and shrink from both sides
Created by: goldengalleon
 

 



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