Question

The proton gradient in cellular respiration in bacteria occurs in

• A. Periplasmic space
• B. Peripheral mesosome
• C. Central mesosome
• D. Both peripheral and central mesosome

Answer 1

The correct option is A Periplasmic space

Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into ATP and then release waste products. Bacteria do aerobic respiration using oxygen. The first step, glycolysis, occurs in the cytoplasm and makes a few ATP and NADH, an electron carrier. Proteins in the electron transport chain move hydrogen ions into the periplasm, the space between the cell wall and the plasma membrane and ATP is produced, thus cellular respiration in bacteria occurs in periplasmic space

So, the correct answer is 'Periplasmic space'.