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

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.