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?
The genetic code is transcribed from the DNA in the nucleus into a molecule called messenger RNA (mRNA). This process is known as transcription. The mRNA then leaves the nucleus and moves to the ribosomes in the cytoplasm, where it functions as a template for protein synthesis.
In the given diagram, "A" likely represents the messenger RNA (mRNA) molecule. It serves as an intermediary carrier of the genetic information from the nucleus to the ribosome, where proteins are ultimately produced.