Gene regulation is/area. ways in which cells control gene expressionb. each event that takes place in the expression of a genec. serves as a control point for gene expressiond. a and ce. a, b, and c 1) ways in which cells control gene expression 2) each event that takes place in the expression of a gene 3) serves as a control point for gene expression 4) a and c 5) a, b, and c