This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
True about bacteria - 
Select and explain. 
A. Mitochondria always absent, B. Sterols always present in cell wall, C. Divide by binary fission, D. a& c
D: a& c
Answer: D: a& c 
Explanation: Ans. is 'a' i.e., Mitochondria always absent; 'c' Divide by binary fission . Bacteria are prokaryotes and do not have mitochondria, nuclear membrane, nucleolus, lysosomes, golgi apparatus, and endoplasmic reticulum. . Sterols are absent in cell wall, except for mycoplasma. . Bacteria divide by binary fission . They can be seen under light microscope, phase contrast microscope, Dark field/ Dark ground microscope and electron microscope.