Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
|
What property of cells allows different domains to exist within the same cell?
|
polarity
|
|
|
What is the portion of the cytoskeleton responsible for sensing the area in front of the cell and creating attachment sites for movement called?
|
leading edge
|
|
|
What are the components of the cytoskeleton composed of actin, approximately 7-9 nm long, involved in cell movement, that take up most of the cell?
|
microfilaments
|
|
|
What are the components of the cytoskeleton composed of alpha,beta-Tubulin dimer, approximately 25 nm long, involved in cell movement, that take up much of the cell?
|
microtubules
|
|
|
What are the components of the cytoskeleton composed of various materials, approximately 10 nm long, that are focused around the nucleus?
|
intermediate filaments
|
|
|
alpha
|
contractile proteins (muscle cells)
|
|
|
beta
|
leading edge (nonmuscle cells)
|
|
|
gamma
|
stress fibers (nonmuscle cells)
|
|
|
Which of the four conformations of actin are most common in cells?
|
ATP G-actin and ADP F-actin
|
|
|
Which end of the actin filament contains an exposed, open ATP site?
|
the (-) end
|
|
|
Which end of the actin filament is preferentially lengthened?
|
the (+) end
|
|
|
What will happen to actin filaments when the monomer concentration is below the critical concentration?
|
the filaments will disassemble
|
|
|
What will happen to actin filaments when the monomer concentration is above the critical concentration?
|
the filaments will assemble
|
|
|
What conformation does the actin adding to the monomer enter in?
|
ATP G-actin
|
|
|
What conformation is the majority of actin in a monomer stored as?
|
ADP F-actin
|
|
|
Which cycle during actin recycling binds to the filament and promotes breakage?
|
Cofilin cycle
|
|
|
Which cycle during actin recycling exchanges the ADP subunit for ATP, promoting addition to the filament?
|
Profilin cycle
|
|
|
Which cycle during actin recycling inhibits monomer assembly by binding to ATP actin?
|
Thymosin cycle
|
|
|
Which capping protein caps the (+) end of a filament, preventing growth?
|
CapZ
|
|
|
Which capping protein caps the (-) end of a filament, preventing shrinking?
|
Tropomodulin
|
|
|
Which capping protein allows actin to form a lattice structure by directing actin branch formation?
|
Arp 2/3 complex
|
|
|
Which protein stabilizes microvilli?
|
Fimbrin
|
|
|
Which protein stabilizes stress fibers?
|
alpha-actin
|
|
|
Which protein stabilizes brached actin?
|
Filamin
|
