A protein that is said to be denatured means that its tertiary structure is caused to unfold possibly by heat, alkali, acid, or by other chemical or physical means, making the molecule lose its original state and become biologically inactive.
Education and Training Requirements. Individuals interested in becoming a host or hostess should take courses in business, arithmetic, bookkeeping, family and consumer science, and public speaking. Hosts and hostesses should be friendly and outgoing people who can remain calm and courteous during rush periods.
The minimum requirements to become a customs agent include: being a U.S. citizen and a U.S. resident for at least three years, being younger than 40 years old, and having a valid driverâs license. You must also pass a medical exam, drug screening, background investigation, polygraph test, and physical fitness tests.