Formation of new sarcomeres and growth of myofibrils requires which of the following proteins?
A)titin
B)nebulin
C)obscurin
D)All apply.

Question

Quizplus · Accepted Answer

All three proteins (titin, nebulin, and obscurin) are essential for the formation and growth of myofibrils. Titin acts as a scaffold and provides elasticity to the sarcomere, while nebulin is involved in regulating the length of the thin filaments. Obscurin is a large protein that interacts with several other proteins involved in muscle development and function, including titin and nebulin. Therefore, all three proteins are required for proper sarcomere formation and myofibril growth.

Formation of New Sarcomeres and Growth of Myofibrils Requires Which