The cellular basis of muscular dystrophy is that some of a child's muscle cells
A) have combined into a structure that cannot contract.
B) lack DNA.
C) lack a protein that enables them to withstand the force of contraction.
D) have too much of a contractile protein and become overworked.
E) have become haploid.

Question

Quizplus · Accepted Answer

Muscular dystrophy is caused by a genetic mutation that leads to the absence or reduced levels of the protein dystrophin. Dystrophin is necessary for maintaining the integrity of muscle fibers during contraction. Without it, muscle cells are unable to withstand the force of contraction and become easily damaged. This damage leads to muscle weakness, wasting, and eventually, loss of function. Therefore, the cellular basis of muscular dystrophy is that some of a child's muscle cells lack the protein dystrophin, which makes them unable to withstand the force of contraction.

The Cellular Basis of Muscular Dystrophy Is That Some of a Child's