Only statement is correct and rest other statements are incorrect. Mycoplasma is a bacteria that lacks cell wall. Mycoplasma do not have DNA. Bacteria can be photosynthetic autotrophic or chemosynthetic autotrophic. The vast majority of bacteria are heterotrophs, i.e., they depend on other organisms or on dead organic matter for food. Slime moulds are saprophytic organisms classified under Kingdom Protista.