(a) What are two ways in which the regulation of ColE1 plasmid replication is similar to the regulation of tra operon expression in F plasmid? (b) What would happen to colE1 plasmid copy number with a promoter mutation that decreases the expression of the Rop protein? (c) What would happen to colE1 plasmid copy number with a promoter mutation that decreases the expression of the RNA-II transcript? (d) What would happen to colEl plasmid copy number with a promoter mutation that decreases the expression of the RNA-I transcript?.