It Was Discovered Recently That Both Auxin and Gibberellins Have

Multiple Choice

It was discovered recently that both auxin and gibberellins have specific protein receptors which,when bound by hormones,

A) inactivate certain gene repressors in the nucleus.
B) activate certain gene repressors in the nucleus.
C) initiate a protein kinase cascade.
D) activate proton pumps in the cell membrane.
E) acidify the cell wall.