Chapter 4 Vocab

2. darkly staining body within the nucleus that is responsible for assembling ribosome subunits
4. eukaryotic organelle comprised of a series of stacked membranes that sorts, stages, and packages lipids and proteins for distribution
7. one of two types of proteins that form dimers and assemble further to become microtubules
8. the fluid-filled region of the chloroplast between the thylakoid membrane and the inner membrane
9. unicellular organism that lacks a nucleus or any other membrane-bound organelle
11. double-membrane bound structure; site where ATP synthesis occurs
13. the cytoskeleton system's narrowest element; it provides rigidity and shape to the cell and enables cellular movements
14. matrix is a filamentous network of proteins that are found inside the nucleus and lines the inner nuclear membrane
15. type of intermediate filament protein that makes up hair and nails
16. envelope double-membrane structure that constitutes the nucleus' outermost membrane portion

1. cytoskeletal component, comprised of several fibrous protein intertwined strands, that bears tension, supports cell-cell junctions, and anchors cells to extracellular structures
3. membrane-bound sac, somewhat larger than a vesicle, which functions in cellular storage and transport
5. group of organelles and membranes in eukaryotic cells that work together modifying, packaging, and transporting lipids and proteins
6. small, round organelle that contains hydrogen peroxide, oxidizes fatty acids and amino acids, and detoxifies many poisons
10. cellular structure that carries out protein synthesis
12. compartment or sac within a cell