Many enzymes consist of a protein and a non-protein (called the cofactor). The proteins in enzymes are usually globular. The intra- and intermolecular bonds that hold proteins in their secondary and tertiary structures are disrupted by changes in temperature and pH. This affects shapes and so the catalytic activity of an enzyme is pH and temperature sensitive.
Everyday in the U.S. millions of cars and trucks idle needlessly, sometimes for hours. You may not be able to avoid keeping your engine running when youâre stopped at a traffic signal or stuck in slow-moving traffic. But other times idling is unnecessary. An idling car can release as much pollution as a moving car.
Now when you are driving in a city, the engine rpm will be minimum and will be near to idle rpm range. So it will take more than 30 minutes to 1 hr to reach fully charged condition from a typical worst case of 70% state of charge of battery. But in a high way drive cycle with high rpm ranges the alternator will generate high amperes and battery will be more than 95% with in 30 minutes.