Two sources of energy for MO . Two sources of hydrogen atoms or electrons 1. Lithotrophs - use inorganics 2. Facilitated diffusion - more prominent in eucaryotes. Active transport - use of energy.
Specificity exists between carrier and substance.
Proton Motive Force is also involved, along with phosphorylated cmpds, to drive the rx. Lactose enters by a symport. By normally have a number of transport systems - even for a certain nutrient. Group translocation - A sugar is phosphorylated as it enters the cell. DNA polymerase III synthesizes a nucleotide strand going in a 5' to 3' direction.