Question

what role do lysosomes play within the cell? a they synthesize proteins. b they store nutrients and water. c they break down cellular waste and debris. d they produce atp for energy. which structure acts as a semi - permeable barrier, protecting the cell and regulating what enters and exits? a nucleus b cell membrane c cytoskeleton d cytoplasm where are ribosomes found within a eukaryotic cell? a both free - floating in the cytoplasm and attached to the rough er. b only within the mitochondria. c only within the nucleus d only attached to the golgi apparatus. which organelle is primarily involved in lipid metabolism and detoxification? a smooth endoplasmic reticulum b golgi apparatus c mitochondria d ribosomes

Explanation:

1. Lysosomes contain digestive enzymes to break down waste and debris in the cell.
2. The cell - membrane is semi - permeable, controlling the movement of substances in and out of the cell.
3. In eukaryotic cells, ribosomes can be free - floating in the cytoplasm or attached to the rough endoplasmic reticulum (ER).
4. The smooth endoplasmic reticulum is involved in lipid metabolism and detoxification processes.

Answer:

1. c. They break down cellular waste and debris.
2. b. Cell membrane
3. a. Both free - floating in the cytoplasm and attached to the rough ER.
4. a. Smooth endoplasmic reticulum