Refer to the Figure Below Showing a Signal Reception Pathway

Multiple Choice

Refer to the figure below showing a signal reception pathway. What happens when the relevant hormone (e.g., auxin or gibberellin) is absent?

A) The repressor protein prevents transcription of growth promoting genes.
B) The addition of ubiquitin to the repressor is stimulated.
C) The repressor protein is broken down in the proteasome.
D) Genes for the relevant hormone are transcribed.
E) The relevant hormone is produced in the cytoplasm of cell.