Question

Which of the following statements about lysosomes is incorrect? a. The hydrolysis of ATP to ADP helps maintain the pH of the lysosome by means of proton transfer. b. If a lysosome encounters a molecule that it cannot digest, it is possible that it may fill with that material and rupture. c. They can degrade macromolecules such as proteins, carbohydrates, and lipids. d. Lysosomes function in phagocytosis and autophagy. **e. They must maintain a pH of 7 in order to function properly.

Answer 1

Answer:

e. They must maintain a pH of 7 in order to function properly.

Explanation:

The pH in lysosome is between 4,5 and 5 because that is the optimal pH for hydrolytic enzymes that are involved in hydrolysis.

The lysosome maintains its pH by pumping in protons from the cytosol via proton pumps and chloride ion channels. Vacuolar-ATPases are responsible for transport of protons and they require ATP hydrolysis for their function. The transport of chloride ions is performed by Cl−/H+ antiporter.