In the practice of science, how is the accuracy of a scientific claim evaluated?

The location of the stomach is the diaprham

Most of the carbon on earth is stored in the form of

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