[Campbell Biology P.1175] According to the provided text and figure, which statement accurate... | Practice Question

According to the provided text and figure, which statement accurately describes the relationship between myofibrils and sarcomeres?

  • A: A single sarcomere contains multiple myofibrils.
  • B: A myofibril is composed of multiple sarcomeres arranged end-to-end.
  • C: Myofibrils and sarcomeres are alternative names for the same structure.
  • D: Sarcomeres are bundles of myofibrils.

Explanation

The text states that 'The myofibrils in muscle fibers are made up of repeating sections called sarcomeres'. The 'Visual Skills' question also implies this relationship: 'multiple sarcomeres per myofibril'. Therefore, a myofibril is a chain of sarcomeres.