Explanation

Transport of metabolites across the biomembrane occurs through (i) Passive Transport Transport of molecules across plasma membrane along the concentration gradient This could occur through simple diffusion or through facilitate diffusion (with the aid of some carriers of channels) (ii) Active Transport Movement of molecules against the concentration gradient with the help of energy (ATP) (iii) In case of bacteria, plasma membrane forms the extensions to form special membranous structures called mesosomes It plays an important role in respiration. In some prokaryotes, like cyanobacteria, membrane extension froms chromatophores, which contains pigments