Question

Compare and contrast the microtubule and microfilament by matching the following statements to the appropriate cytoskeletal component.

-       A.       B.       C.       D.    Have polymers that are polar.       -       A.       B.       C.       D.    Have subunits that are non-polar.       -       A.       B.       C.       D.    Uses dynein motors for retrograde transport of endosomes up axons.       -       A.       B.       C.       D.    Use motor proteins that have a power-stroke stepping motion with a step distant determined by the neck length of the motor proteins.       -       A.       B.       C.       D.    Are structures that are dynamically growing and shrinking unless they are stabilized by polymer binding proteins.       -       A.       B.       C.       D.    Requires ATP to produce polymers from subunits.

A. Neither Microtubules nor Microfilaments B. Microtubules C. Microfilaments D. Both Microfilaments and Microtubules

Answer 1

Both the microfilaments and microtubules have polymer that are polar. (D)

Microfilaments have subunits that are non polar. (C)

Microtubules uses dynein motor for retrograde transport of endosomes up axons.(B)

Neither Microfilaments nor Microtubules uses motor protein that have a power stroke stepping motion with a step distant determined by the neck length of motor protein. (A)

Microtubules are the structures that are dynamically growing and shrinking unless they are stabilize by polymer binding protein.

Microfilaments requires ATP to produce polymers from subunits.