During periods of vigorous physical activity, a persons breathing and heart rates increase. this enables the cells of the body to perform more efficiently because it the cells to

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