Which of the following creates droblemin getting prokaryotic cells to express eukaryotic genes ?
A. The signals that control gene expression are different and prokaryotic promoter region must be added to thev vector
B. The genetic code differs between the two because prokaryotic substitute the uracil for thymine
C. Prokaryotic cells cannot transcribe exons because their genes do not have them
D. Te ribosomes of prokaryotes are not large enough to handle long eukaryotic genes
