The lac repressor is an allosteric protein. What does this mean?
AIt has two interchangeable shapes
BIt is the enzyme for lactose
CIt is made only with glucose
DIt is a coiled DNA strand
Answer & Solution
Correct answer: A. It has two interchangeable shapes
It exists in two forms in equilibrium, one binding the operator tightly and one not.
Related questions
Besides allolactose, which artificial inducer binds the lac repressor?At which level does the lac operon control gene expression?Which was the first genetic regulatory mechanism to be understood clearly?The lac repressor is made of how many identical subunits?Sequential use of glucose then lactose in two growth phases is called what?How does the cAMP level relate to glucose availability?Lac genes are co-transcribed into which kind of mRNA?The lacI gene is expressed in what way?