Indicate if each of the following descriptions matches actin filaments (A), microtubules (M), or intermediate filaments (I). Your answer would be a four-letter string composed of letters A, M, and I only; e.g. AAMM.
( ) They form hollow structures with multiple lateral interactions.
( ) They form strong structures that are more resilient than the other two cytoskeletal filaments.
( ) Their subunits bind GTP and hydrolyze it.
( ) They form coiled-coil interactions between the subunits.

Question

Indicate if each of the following descriptions matches actin filaments (A), microtubules (M), or intermediate filaments (I). Your answer would be a four-letter string composed of letters A, M, and I only; e.g. AAMM.
( )	They form hollow structures with multiple lateral interactions.
( )	They form strong structures that are more resilient than the other two cytoskeletal filaments.
( )	Their subunits bind GTP and hydrolyze it.
( )	They form coiled-coil interactions between the subunits.

Quizplus · Accepted Answer

Microtubules form hollow tubes whose walls are composed of tubulin subunits. Tubulins can bind GTP. Intermediate filament subunits form ?-helical coiled-coils. These filaments form strong ropelike structures that tolerate mechanical stress, such as stretching and bending, to a greater extent compared to actin filaments and microtubules.

Indicate If Each of the Following Descriptions Matches Actin Filaments