Given access to both glucose and lactose, E. coli will use the glucose. Describe the relationship between glucose supply, cAMP, and CRP.
a. When glucose supply is high, cAMP levels are low and CRP is inactive.
b. When glucose supply is low, cAMP levels are high and CRP is active.
c. When glucose supply is high, cAMP levels are high and CRP is inactive.
d. When glucose supply is low, cAMP levels are low and CRP is active.