The dark bands or striations where you find myosin in a muscle fiber are the _____ bands.
A) H
B) A
C) I
D) Z and M

Question

Quizplus · Accepted Answer

The A bands contain the thick myosin filaments, which give rise to the striations in muscle fibers. The H band is inside the A band, but it is a lighter-colored region within the A band where only myosin filaments occur. The I band contains the thin actin filaments and is located between A bands. The Z and M lines are structures that anchor the sarcomeres in place, but they do not contribute to the striations seen in the muscle fibers.

The Dark Bands or Striations Where You Find Myosin in a Muscle