Enzyme Regulation: Covalent Modification Practice Problems

How does phosphorylation result in the modification of an enzyme to either increase or decrease its activity?

Choose the appropriate type of enzymatic control for the scenarios given below: 

a. An enzyme that is excessively active in the time of an infection 

b. An enzyme required only when there is a high level of blood sugar 

c. An enzyme that becomes active in response to a severe burn 

d. An enzyme required only in the course of pregnancy

Which of the statements below best describes how enzyme activity is regulated by genetic control?