Myofibrils contain two different proteins called?

structure. The filaments of myofilaments,  consist of two types, thick and thin: Thin filaments consist primarily of the protein action, coiled with nebulin filaments. Action, when polymerized into filaments, froms the “ladder” along which the myosin filaments “climb” to generate motion

Actin and myosin.

hope this helps <3

(I just simplafyed the other persons so they deserve some thanks for that)

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

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