PCB3134 Final Exam (Chapters 13, 14, 15, 16, 17, 18, 19, ,22, 23
) – Questions With Definite Solutions
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INBDE Orthodontics NBDE II Review - Prosthodontics Perio Study
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Practice questions for this set
Learn 1/6 Study with Learn
A large family of motor proteins that uses the energy of ATP hydrolysis to move toward
the plus end of a microtubule.
Choose an answer
1 kinesin 2 Cytoskeleton overview
3 α-Actinin 4 Microtubule structure
Don't know?
Terms in this set (144)
Cytoskeleton overview Microtubules, Microfilaments, and Intermediate filaments
Microtubules Spiral strands of protein molecules that form a tubelike structure
Microtubule composition tubulin
Microtubule polarity Orientation with plus and minus ends.
Cylindrical outer structure composed of a helical array of
polymerized heterodimers of a- and b-tubulin
Microtubule structure Each dimer has 2 GTP bound
Grows slowly, collapses quickly
Involved with slow axoplasmic transport in neurons
Microtubule assembly Tubulin subunits assembles to form a protofilament.
Microtubule disassembly Breakdown of microtubules into tubulin dimers.
Taxol binds and stabilizes microtubules
Role of GTP protein metabolism
CapZ prevents assembly and disassembly at microfilament plus ends.
, An actin-binding protein that cross-links actin filaments into
Filamin
networks.
Gelsolin severs filaments and binds to plus end
An actin-binding protein that cross-links actin filaments into
α-Actinin
contractile bundles.
Fascin in filopodia keeps the actin tightly bundled
Long, thin fibers that function in the movement and support of
Microfilaments
the cell
Microfilament composition protein actin
Microfilament polarity plus and minus ends
G-actin, F-actin, muscle-specific actins (α-actins) and non-muscle
Types of actin structures
actins (β- and γ-actins).
monomers can polymerize reversibly into filaments with a lag
G-actin
phase and elongation phase, like tubulin assembly
filaments are composed of two linear strands of polymerized G-
F-actin
actin wound into a helix
flat, sheet like extensions from core of growth cones, have a
Lamellipodia
branched network of actin
microfilaments form highly oriented, polarized cables with the
Filipodia
plus ends toward the tip of the protrusion.
nucleates assembly to form a web and remains associated with
Arp 2/3 complex
the minus end
bind ATP-actin and nucleate initial polymerization of long
Formins
unbranched actin filaments
Threadlike proteins in the cell's cytoskeleton that are roughly
Intermediate filaments
twice as thick as microfilaments
How many classes of 6
intermediate filament classes are
there?
intermediate filament proteins found in epithelial cells;
contribute to the mechanical integrity of the cell and also
Keratins
function as regulatory proteins; the primary protein that makes
up hair and nails
Types of motor proteins myosin, kinesin, dynein
A protein present in muscle fibers that aids in contraction and
myosin
makes up the majority of muscle fiber
-two protein strands twisted together
Myosin structure
-globular heads (myosin crossbridges)
Myosin types
Muscle contractile mechanisms
Hierarchical organization of whole muscle, muscle fascicle, muscle fiber, myofibril,
muscle myofilament
Basic contracting unit of muscle cell consits of actin and myosin
Sacromere
filaments between z-lines in a muscle cell
myosin and actin both arranged in repeating units called
Sacromere organization
sacromeres
The theory explaining how muscle contracts, based on change
within a sarcomere, the basic unit of muscle organization, stating
Sliding filament model that thin (actin) filaments slide across thick (myosin) filaments,
shortening the sarcomere; the shortening of all sarcomeres in a
myofibril shortens the entire myofibril
) – Questions With Definite Solutions
Save
Students also studied
INBDE Orthodontics NBDE II Review - Prosthodontics Perio Study
201 terms 69 terms Teacher 78 terms
dong_lee82 Preview melissa_jarvis7 Preview Hunter_Charters
Practice questions for this set
Learn 1/6 Study with Learn
A large family of motor proteins that uses the energy of ATP hydrolysis to move toward
the plus end of a microtubule.
Choose an answer
1 kinesin 2 Cytoskeleton overview
3 α-Actinin 4 Microtubule structure
Don't know?
Terms in this set (144)
Cytoskeleton overview Microtubules, Microfilaments, and Intermediate filaments
Microtubules Spiral strands of protein molecules that form a tubelike structure
Microtubule composition tubulin
Microtubule polarity Orientation with plus and minus ends.
Cylindrical outer structure composed of a helical array of
polymerized heterodimers of a- and b-tubulin
Microtubule structure Each dimer has 2 GTP bound
Grows slowly, collapses quickly
Involved with slow axoplasmic transport in neurons
Microtubule assembly Tubulin subunits assembles to form a protofilament.
Microtubule disassembly Breakdown of microtubules into tubulin dimers.
Taxol binds and stabilizes microtubules
Role of GTP protein metabolism
CapZ prevents assembly and disassembly at microfilament plus ends.
, An actin-binding protein that cross-links actin filaments into
Filamin
networks.
Gelsolin severs filaments and binds to plus end
An actin-binding protein that cross-links actin filaments into
α-Actinin
contractile bundles.
Fascin in filopodia keeps the actin tightly bundled
Long, thin fibers that function in the movement and support of
Microfilaments
the cell
Microfilament composition protein actin
Microfilament polarity plus and minus ends
G-actin, F-actin, muscle-specific actins (α-actins) and non-muscle
Types of actin structures
actins (β- and γ-actins).
monomers can polymerize reversibly into filaments with a lag
G-actin
phase and elongation phase, like tubulin assembly
filaments are composed of two linear strands of polymerized G-
F-actin
actin wound into a helix
flat, sheet like extensions from core of growth cones, have a
Lamellipodia
branched network of actin
microfilaments form highly oriented, polarized cables with the
Filipodia
plus ends toward the tip of the protrusion.
nucleates assembly to form a web and remains associated with
Arp 2/3 complex
the minus end
bind ATP-actin and nucleate initial polymerization of long
Formins
unbranched actin filaments
Threadlike proteins in the cell's cytoskeleton that are roughly
Intermediate filaments
twice as thick as microfilaments
How many classes of 6
intermediate filament classes are
there?
intermediate filament proteins found in epithelial cells;
contribute to the mechanical integrity of the cell and also
Keratins
function as regulatory proteins; the primary protein that makes
up hair and nails
Types of motor proteins myosin, kinesin, dynein
A protein present in muscle fibers that aids in contraction and
myosin
makes up the majority of muscle fiber
-two protein strands twisted together
Myosin structure
-globular heads (myosin crossbridges)
Myosin types
Muscle contractile mechanisms
Hierarchical organization of whole muscle, muscle fascicle, muscle fiber, myofibril,
muscle myofilament
Basic contracting unit of muscle cell consits of actin and myosin
Sacromere
filaments between z-lines in a muscle cell
myosin and actin both arranged in repeating units called
Sacromere organization
sacromeres
The theory explaining how muscle contracts, based on change
within a sarcomere, the basic unit of muscle organization, stating
Sliding filament model that thin (actin) filaments slide across thick (myosin) filaments,
shortening the sarcomere; the shortening of all sarcomeres in a
myofibril shortens the entire myofibril
