When arginine is added to a culture growing exponentially in a medium without arginine, what occurs?
A. All cellular growth ceases.
B. Growth continues, but the production of enzymes required for the synthesis of arginine ceases.
C. Growth continues, but the production of enzymes required for the synthesis of arginine increases.
D. The cell returns to the lag stage of growth to synthesize the proteins necessary for the metabolism of arginine.
Answer:B
When arginine is added to a culture growing exponentially in a medium without arginine, what occurs?
A. All cellular growth ceases. B. Growth continues, but the production of enzymes required for the synthesis of arginine ceases. C. Growth continues, but the production of enzymes required for the synthesis of arginine increases. D. The cell returns to the lag stage of growth to synthesize the proteins necessary for the metabolism of arginine.