Troponin, a major protein in thin filaments, is a globular protein with three polypeptide subunits. which of the following is not a function of the troponin? a) one subunit binds to calcium ions. b) one subunit binds tropomyosin and position it on actin. c) one subunit binds to potassium ions. d) one subunit attaches troponin to actin.

The correct answer is C.

Explanation:

Troponin have 3 subunits called Troponin C, Troponin T and Troponin I:

Troponin C is responsible for binding calcium ions. C might be a reference to calcium.

Troponin T is responsible for binding tropomysoin. T might be a reference to tropomysoin.

Troponin I is respobsible for binding actin.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.