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.

The lac operon, which stands for Lactose operon is known as an inducible system. It is the an operon required for the transport and metabolism of lactose some enteric bacteria (Echerichia coli for example). The Lac operon is only activated in the presence of a key molecule. The key molecule is lactose.
From the given options the following best describes the Lac operon:

D. The repressor is freed from the operator when lactose is present.

interphase   is the cell cycle stage in which the cell acquires nutrients, creates and uses proteins and other molecules and starts the process of cell division by replicating the dna. it is the longest stage in the eukaryote cell cycle.

the following   can go wrong during interphase:   a base pair could be mismatched during the duplication process causing a mutation.   correct answer: c

explanation:

a. by using fur or clothes to trap heat energy near the body