High to low concentration: Movement may be passive (no energy expenditure – diffusion or facilitated diffusion): Simple diffusion: Movement of a solute from an area of high concentration to an area of low concentration. (ions move until equilibrium reached) Facilitative diffusion: Solute combines with a transporter protein in the membrane. Movement Across Membranes
Nuclear area (nucleoid) – contains single long, continuous, double-stranded DNA called bacterial chromosome. Bacteria can contain plasmids – circular DNA Nuclear Area Figure 4.6a, b Learning objectives: Identify functions of the nuclear area, ribosomes, and inclusions.