Muscles are specialized cells found in animals. Why would it be necessary for a muscle cell to have a higher percentage of mitochondria than other cells in the body?

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now