Descriptions of enzyme mechanisms often contain the terms intermediate, transition state, and transition state analogue. the terms intermediate and transition state both describe chemical species along the reaction pathway, but there are important distinctions between the two. transition state analogues are often used in enzyme mechanism studies.

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.