What would be the result of a mutation that deactivates the regulatory gene of a repressible operon in an escherichia coli cell?

a) irreversible binding of the repressor to the operator
b) continuous transcription of the structural gene controlled by that regulator
c) continuous translation of the mrna because of alternation of its structure
d) complete inhibition of transcription of the structural gene controlled by that regulator

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.