The area that is today the center of Allentown was laid out as Northampton Town in 1762 by William Allen, a wealthy shipping merchant, former mayor of the city of Philadelphia and then-Chief Justice of the Province of Pennsylvania.
Mitochondria and Chloroplasts are known to have their own DNA and make their own proteins. According to endosymbiosis theory, these organelles were known to have moved into eukaryotic cell in the form of vesicles when they came into contact with prokaryotes. :) Views.
Chloroplasts and mitochondria share other features: Both often migrate from place to place within cells and also contain their own DNA, which encodes some of the key organellar proteins (Chapter 9). The proteins encoded by mitochondrial or chloroplast DNA are synthesized on ribosomes within the organelles.