Answer:
The ath operon is most likely controlled by the CAP and a repressor similar to the lac operon.
Explanation:
The CAP senses the low concentration of glucose and activates the transcription of the ath operon for it to metabolize the athelose and obtain energy. When the glucose is in high concentrations, the ath repressor, which works as a lac repressor, inhibits the transcription of the ath operon, it does this by binding to a part of the operon called operator getting in the ARN polymerase way and stoping the transcription. If there is glucose, the repressor binds to it and it is not bound to the operon allowing the transcription and metabolism of glucose.
Answer:
The correct answer is option A, that is, astrocytes.
Explanation:
Glial cells or the glia refers to the non-neuronal cells in the CNS and the PNS that maintain homeostasis produces myelin, and offer protection and support for neurons. The most prominent type of glial cells in the CNS are astrocytes.
The astrocytes exhibit various projections, which connect neurons with their blood supply and at the same time maintaining the blood-brain barrier.