Genes for Regulatory Elements, Such as Creb, Were Found to Be

Multiple Choice

Genes for regulatory elements, such as creb, were found to be important in animal learning. Which of the following would increase the probability that such an element is studied throughout the animal kingdom?

A) its unique sequence in Drosophila
B) the finding that creb is highly conserved
C) the number of repeats of the creb gene
D) the interaction of creb with cAMP
E) the finding that creb activates odor perception