Which one of the following accurately describes the lac operon?
a. rna polymerase is prevented from transcribing the lac genes when lactose is present.
b. rna polymerase transcribes the lac genes when lactose isn't present.
c. the repressor protein binds to the operator when lactose is present.
d. the repressor is freed from the operator when lactose is present.

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.