Final answer:
A flower with both a functional Enzyme A and Enzyme B would be blue, as Enzyme A converts a colorless molecule to red, and then Enzyme B converts red to blue. The correct option is A) Blue
Step-by-step explanation:
The color of a flower that had a functional Enzyme A and a functional Enzyme B would be blue. This is due to the sequential action of the two enzymes where Enzyme A converts a colorless molecule to a red pigment molecule, and then Enzyme B converts the red pigment molecule into a blue molecule.
This process is similar to how chromogenic substrates are converted into colored end products by enzymes in biochemical pathways. Since both enzymes are functional, the final pigment observed would be the last one in the reaction sequence, which in this case is blue.
The coloration of flowers relies on these biochemical pathways driven by specific enzymes that are responsible for the pigmentation. The correct option is A) Blue