Question

What is the basic unit of a muscle? which answer is correct
myosin
actin
muscle fibers
myofibrils
GPT-4o mini
The basic unit of a muscle is **muscle fibers**. Muscle fibers are made up of myofibrils, which contain the proteins myosin and actin that are responsible for muscle contraction. Thus, while myon fibers are the broader structural units, myofibrils and the proteins within them are essential components of muscle function.