In the Same Experiment, What Would Have Been the Conclusion

question 27

Multiple Choice

In the same experiment, what would have been the conclusion if all four tubes produced a yellow color when b-ONPG was added?

• A) Expression of the lac operon is constitutive whether lacI is functional or not
• B) LacI provides the binding site for the repressor
• C) LacI encodes a diffusible repressor
• D) The researcher added too much b-ONPG