sacomeres are a single unit of a muscle fiber multiple sacomeres make up a myofibril
I do believe you are asking about a sarcomere, units of repeating bands that make up the fibers (myofibrils) of a striated muscle.
make more muscle fiber
vertebra is one of the repeating units
make more muscle fiber
Amino Acids
Make more muscle fiber.
large molecules make up of chains of repeating units are called POLYMERS.
the two proteins that make up muscles fibers are acting and myosin
Strictly speaking the answer is "mers" - repeating units. Polymers are made from monomers though and this is an acceptable answer.
microfiliments and microtubulars
microtubules
microtubules