Eukaryotic Cell Labeling Quiz

1. Inside the nucleus, a dark, dense region is active in ribosomal RNA production and ribosomal subunit assembly. What should it be labeled?

2. Which label identifies the selectively permeable boundary that encloses every eukaryotic cell and controls movement between the cell and its surroundings?

3. A newly made protein destined for secretion enters a folded membrane network covered with ribosomes. Which structure is this?

4. A diagram’s arrow points specifically to the intracellular fluid surrounding the organelles, not to the organelles themselves. Which term is the most precise label?

5. A bean-shaped organelle has a double membrane and many folds along its inner membrane. What should it be labeled?

6. On a cell diagram, numerous tiny dots appear either free in the cytosol or attached to a membrane network. What should those dots be labeled?

7. A cell that produces steroid hormones has an extensive membrane network without attached ribosomes. Which label is most appropriate?

8. A label points to the double membrane surrounding the nucleus, including the pores that regulate traffic into and out of it. What is being labeled?

9. Most of a mature plant cell’s interior is occupied by one large, fluid-filled compartment that helps maintain turgor pressure. Which label fits it?

10. In a leaf cell, a label points to a green organelle containing internal stacks of thylakoid membranes. Which structure is indicated?

11. A membrane-bound compartment contains acidic enzymes that break down worn cell components and macromolecules. Which label belongs there?

12. A label points to the large organelle that contains most of a eukaryotic cell’s DNA. Which structure should it name?

13. A micrograph shows a stack of flattened membrane sacs with small vesicles budding from its edges. Which label fits this structure?

14. An organelle breaks down certain fatty acids and uses catalase to convert hydrogen peroxide into less harmful substances. Which label identifies it?

15. A drug disrupts the internal network of protein filaments needed for cell shape, organelle movement, and chromosome separation. Which structure has been affected?

16. A plant-cell diagram shows a thick, rigid layer immediately outside the plasma membrane. What is the correct label?