Question 1
In the
lac operon, the product of structural gene
lacZ is capable of ________.
◦ replacing hexokinase in the early steps of glycolysis
◦ splitting the β-linkage of lactose
◦ nonautonomous replication
◦ forming lactose from two glucose molecules
◦ forming ATP from pyruvate
Question 2
Which of the following terms best characterizes catabolite repression associated with the
lac operon in
E. coli?
◦ negative control
◦ inducible system
◦ positive control
◦ repressible system
◦ constitutive