Question

which of the following best describes the term sarcomere? protein that accounts for elasticity of resting muscle storage site for calcium ions an anchor for thick filaments largely made of myosin repeating unit of striated myofibrils

Explanation:

A sarcomere is the basic repeating unit of striated muscle myofibrils. The other options describe different components or functions in muscle - the protein for muscle elasticity is titin, the storage site for calcium ions is the sarcoplasmic reticulum, thick filaments are anchored by structures like the M - line, and while myosin is a major component of thick filaments in a sarcomere, the best overall description of a sarcomere is as a repeating unit of striated myofibrils.

Answer:

repeating unit of striated myofibrils