Chapter 21, Problem 21.34EP

Indicate whether each of the following statements concerning enzymes and their mode of action are true or false.

1. a. According to the induced-fit model of enzyme action, a substrate must be changed into a cofactor before a chemical reaction occurs.
2. b. The active site of an enzyme is the location within the enzyme where catalysis takes place.
3. c. The protein portion of a conjugated enzyme can accommodate several substrates at the same time.
4. d. Simple enzymes do not have active sites, whereas conjugated enzymes do have active sites.