How do cells in the ovary detect a hormone from the brain?

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

What happens when a scientific theory is shown to be an accurate description of a phenomenon?

What is the role of pancreatic juice in digestion?