The nucleus controls which proteins are made because your DNA has a certain pattern of A-T and C-G. These patterns get transcribed and translated to create mRNA to create your proteins on the ribosome.
It depends on the genes that are transcribed in the cell. Genes are transcribed into messenger RNA molecules (mRNAs) that are translated into proteins in the ribosomes. Gene transcription is a fundamental cellular mechanism that depends on transcription factors which bind target promoter regions
