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
The electron transpo system of Neisseria is located on which of the following structures? 
Select and explain. 
A. Cytoplasmic membrane, B. Mesosome, C. Mitochondria, D. Nuclear membrane
A: Cytoplasmic membrane
Answer: A: Cytoplasmic membrane 
Explanation: Unlike eukaryotic cells in which the electron transpo system is located on mitochondria, the electron transpo system of bacteria is located on the cytoplasmic (plasma) membrane. Mesosomes and polyribosome DNA aggregates are also found in bacterial cells and function in cell division and protein synthesis, respectively. Bacteria do not have mitochondria or membrane-bounded nuclei. Ref: Brooks G.F. (2013). Chapter 2. Cell Structure. In G.F. Brooks (Ed), Jawetz, Melnick, & Adelberg's Medical Microbiology, 26e.