In various textbooks, including Watson's book on DNA, the central dogma describes a flow of information from DNA to RNA to protein. Crick calls this the sequence hypothesis. Watson's definition seems to have taken hold in most textbooks today.
You need to be at least 15 years old work mcdonald's, though the age requirements vary depending on position. Startwiremcdonald's job applications, organization blog.
You must be at least 18 years old to work as a bartender, though some states require that you be 19 or 21. Some states also require that bartenders take alcohol awareness classes prior to beginning work. Check with your city/state to clarify the specific requirements.