Figure 1 represents part of a process that occurs in eukaryotic cells. There are untranslated regions in this sequence. ( Image below) Which of the following best explains the process represented by Figure 1?
The enzyme-regulated processing of pre-mRNA into mature RNA.
The synthesis of mRNA in the 5’ to 3’ direction from DNA.
The translation of an mRNA molecule into a polypeptide.
SNPs are removed from a mature RNA molecule.

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit. there is a precise compatibility between the active site and the lactose molecule. specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed. reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.