Cell structures

3. membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers
5. single-celled organism that has neither a distinct nucleus with a membrane
7. class of small organelles, such as chloroplasts, in the cytoplasm of plant cells
8. a minute cylindrical organelle near the nucleus in animal cells
9. having or consisting of many cells.
11. is the gelatinous liquid that fills the inside of a cell.
13. rigid hollow rods approximately 25 nm in diameter
16. a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane.
17. a slender threadlike structure, especially a microsco
18. plastid that contains chlorophyll
20. an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae).

1. space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid.
2. organism consisting of a cell or cells in which the genetic material is DNA
4. a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose.
6. the semipermeable membrane surrounding the cytoplasm of a cell.
10. the aqueous component of the cytoplasm of a cell
12. a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
14. structure that helps cells maintain their shape
15. A nucleus is a membrane-bound organelle that contains the cell's chromosomes.
19. a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins.