Question

Which is the site of cellular respiration in prokaryotes?

• A. Mitochondrion
• B. Plasmids
• C. Plasma membrane
• D. Cytosol

Answer 1

Answer: (C)

Plasma membrane

Options A and B are incorrect as mitochondria and plastids are double membrane bound organelles which are absent in prokaryotes. Cellular respiration is the step wise flow of electrons through or within a membrane from a reduced compound to electron acceptor accompanied by ATP synthesis. Owing to absence of mitochondria, the site of cellular respiration in eukaryotes, the cell membrane/plasma membrane of prokaryotes serves as site for cellular respiration. This makes option C correct answer. Option D is incorrect as cytosol is the semiclear liquid of cell surrounded by cell membrane while the process of cellular respiration needs a membrane.