Which of the following are usually digested or degraded by lysosomes?
(a) ATP molecules
(b) oxygen molecules
(c) old organelles of the cell
(d) carbon dioxide molecule
Answers
Answer:
(c) old organelles of the cell
Answer:
Old organelles of the cell are usually digested by lysosomes.
Explanation:
Lysosome, a subcellular organelle that is present in almost all eukaryotic cells (cells with a distinct nucleus) and is in charge of breaking down macromolecules, defunct cell components, and microbes.
Each lysosome is enclosed by a membrane that uses a proton pump to keep the interior of each lysosome acidic.
Numerous hydrolytic enzymes (acid hydrolases) are found in lysosomes and break down macromolecules such nucleic acids, proteins, and polysaccharides.
Since the pH of the cell ranges from neutral to slightly alkaline, the activity of these enzymes, which is acid-dependent, prevents the cell from degrading itself in the event of lysosomal leakage or rupture.