what is the difference between microtubles, microfilaments, and intermediate filaments?Determine if the each of the following is true of microtubules, microfilaments, or intermediate filaments. Use...

what is the difference between microtubles, microfilaments, and intermediate filaments?

Determine if the each of the following is true of microtubules, microfilaments, or intermediate filaments. Use the key below to indicate your answers.

MT = Microtubules;   MF = Microfilaments;  IF = Intermediate filaments

______ Straight, hollow tubes

______ Made of tubulin

______ Involved in cell transport

______ Provides tracts for organelle movement

______ Make up spindle fibers, centrioles, cilia, and flagella

______ Solid rods

______ Made of actin

______ Involved in muscle contraction and localized cell contractions

______ Form 3-D support network just inside the cell membrane

______ Form contractile ring that pinches dividing animal cell in two

______ Produces cytoplasmic streaming

______ Intermediate in diameter

______ Composition varies

______ More permanent

______ Reinforces cell shape and may fix organelle position

Asked on by brian950

1 Answer | Add Yours

jerichorayel's profile pic

jerichorayel | College Teacher | (Level 2) Senior Educator

Posted on

Hello!

 

I see that you have several items to be answered. It would be better if we try to define each terms and from there you will be able to provide the answer in the blanks.

Microtubules are a component of the cytoskeleton made of globular proteins called tubulin, combined together to form a straight hollow tubes. It produces spindle fiber during cell division which eventually helps in contraction of the cell forming and cleavage.

Microfilaments are also called actin (a protein) filaments. There are thin filament found in cytoskeleton which primarily aid in transport. It has a tough structure that and allows cell motility or movements which includes muscle contractions.  Microfilaments also produces cytoplasmic streaming due to actin.

Intermediate filaments are in the form of rods which are composed of varieties of alpha-helical segmanets such as 1A, 1B, 2A and 2B. They reinforces and support cell shape and may fix organelle position therefore more permanent than the rest.

 

 

diameters:

Intermediate filaments 6-12 nm

micro filaments - >6nm

microtubules - 25nm

 

 

 

hope this helps :)

 

We’ve answered 318,960 questions. We can answer yours, too.

Ask a question