General
the 3 types of cytoskeleton elements
microfilaments, intermediate filaments, microtubules
what protein microfilaments are made of
actin
one example of an intermediate filament protein (that we talked about in class)
keratin
lamin proteins
what protein microtubules are made of
tubulin
what 2 things do motor proteins do?
1. carry cargo
2. walk along cytoskeletal elements
one function of the cytoskeleton
structure/stability
movement
motor protein for microfilaments
myosin
motor protein for intermediate filaments
none
(we didn't talk about any)
motor protein for microtubules
kinesin
DAILY DOUBLE -- What is the name of Bradley University's founder?
Lydia Moss Bradley
what does polymerization mean?
assembling many monomers to make a polymer
comparing the sizes of the cytoskeletal elements, microfilaments are the ____
(biggest, medium, or smallest)
smallest
comparing the sizes of the cytoskeletal elements, intermediate filaments are the ____
(biggest, medium, or smallest)
medium
comparing the sizes of the cytoskeletal elements, microtubules are the ____
(biggest, medium, or smallest)
biggest
what types of bonds hold together microtubule monomers?
noncovalent bonds
what does transient mean?
easy to make, easy to break
actin monomers add onto the ___ end of an actin polymer
one specific function of intermediate filaments
anchor cell structure
connect cells
nucleolamina (structure of nucleus)
etc
tubulin monomers add onto the ___ end of tubulin polymers
the + end
what molecule do motor proteins utilize in order to walk?
ATP
how many subunits do actin and tubulin have?
2
direction that the motor protein travels on microfilaments
towards the + end
what disease can happen when there is a mutation in the nuclear lamina proteins?
progeria
direction that the motor protein travels on microtubules
towards the + end
the + end of microfilaments is dynamic. What does this mean?
It is less stable than the - end. It can have monomers added or removed more easily than the - end. readily changing