Compare and contrast (in general): (4 pts) a) Different types of the protein regulators b) Different types of the environmental signals Explain (in great details!) the attenuation mechanism in trp-operon. (4 pts) 2. Explain both alternative views on the repression mechanism caused by binding of the Lacl to the operator region What is interrelationships between EIA and Covid pandemic. Describe Covid pandemic and other ongoing threats of infectious nature.