List six general ways in which enzyme activity is controlled.

Allosteric Regulation Versus Covalent Modification What are the relative advantages (and disadvantages) of allosteric regulation versus covalent modification?

Review the mechanisms of the serine and aspartic proteases, and compare these two mechanisms carefully. Are there steps in the mechanisms that are similar? How are they similar? How are they different?

What would you expect to be the most immediate effect on glycolysis if the steady-state concentration of glucose-6-P were  8.3 mM instead of 0.083 mM? Explain.

The _____ is a type of regulator protein that binds to a region of DNA called the operator and prevents transcription from taking place.

An operon is controlled by a repressor. When the repressor binds to a small molecule, it is does not bind to the DNA near the operon. The operon is never expressed if a mutation prevents the repressor from binding to the small molecule. The type of control illustrated is:

A mutant E. coli strain (that grown under normal conditions induces the lac operon) produces particularly high amounts of ß-galactosidase where lac Z gene encodes for ß-galactosidase. What is a possible genotype of the cells?

A promoter that affects only genes that are on the same piece of DNA is referred to as a(n) _____-acting promoter

Insulators can block the effects of 

Proteins that affect the structure of DNA bound to histones without altering histone chemical structure (ie. sliding the histones along the DNA) are called: