Which of the following is NOT true of a myofibril?
A)Thin myofilaments consist of actin, troponin, and tropomyosin.
B)Elastic filaments are composed of titin.
C)Thick myofilaments consist of myosin.
D)Myofibrils are composed of muscle fibers.
E)All of these are true of myofibrils.

Question

Quizplus · Accepted Answer

Myofibrils are not composed of muscle fibers. Rather, they are structures within muscle fibers that are responsible for muscle contraction.

Which of the Following Is NOT True of a Myofibril