cell concentration this activity is a review of the terms in sections 2-1 & 2-4 of Chapter 2 in Biology: Principles & Explorations Tools A B prokaryote cell without have a nucleus eukaryote cell with a nucleus ribosomes structures on which proteins are made organelles membrane bound internal compartments endoplasmic reticulum extensive system of internal membranes vesicles membrane enclosed sacs Golgi apparatus packaging & distribution center of the cell chromosomes rod shaped structures made of DNA & protein mitochondria powerhouse of the cell central vacuole large internal storage space in plants