Answer: (c) Explanation . In animal cells, ribosomes can be found freely in a cell’s cytoplasm or attached to the endoplasmic reticulum. The sacs and tubules are interconnected to each other by a single membrane so that the organelle has only one large and complexly arranged internal space called the lumen. Its membrane typically constitutes more than half of the total membrane of an average animal cell (see Table 12-2). 13. Chromosomes—house cellular DNA. Lysosome 5. Smooth endoplasmic reticulum 12. Cell Structure & Function In contrast, the expression of alpha-SMA in cells made quiescent by cell-cell contact was lower than that in cells made quiescent by serum starvation. • Produces lipids, involved in carbohydrate metabolism, and detoxification of drugs and poisons. Lysosome 9. The ER can be classified in two functionally distinct forms: smooth endoplasmic reticulum (SER) and rough endoplasmic reticulum (RER). Cytoskeleton 7. Nucleolus 6 15. The vacuole: Plant cells contain at least one large vacuole to maintain the cell's shape, while animal vacuoles are smaller in size. The space within the ER is called the ER lumen. The ER is organized into a netlike labyrinth of branching tubules and flattened sacs extending throughout the cytosol (Figure 12-35). The Endoplasmic Reticulum (ER) is an arrangement of compacted sacs that extends throughout the cytoplasm in both animal and plant cells. Cytoplasm 10. Rough and smooth ER are typically connected to one another so that the proteins and membranes made by the rough ER can freely move into the smooth ER for transport to other parts of the cell. The endoplasmic reticulum (ER) is a network of flattened, membrane-bound sacs that are involved in the production, processing, and transport of proteins that have been synthesized by ribosomes. The cell wall: Plant cells have an outer cell wall; animal cells simply have the plasma membrane. Endoplasmic Reticulum. Unlike the role of the microtubule in cell division in the animal cell, the plant cell uses the microtubules to transport materials within the vell and they are also used in forming the plant cell, cell wall. The cell membrane is only one component of a cell. Therefore, C is the answer above. Cell wall 9. Nucleus 2. Plasma membrane 6. The Endoplasmic Reticulum. Chloroplasts: Plant cells have them; animal cells don't. Introduction. The rough ER is studded with ribosomes Smooth Endoplasmic Reticulum (Smooth ER) The main difference between the rough ER and the smooth ER is that the smooth ER does not have ribosomes attached to its surface. The following cell structures can also be found in a typical animal eukaryotic cell: Centrioles—help to organize the assembly of microtubules. Vacuole The tubules and sacs are all thought to interconnect, so that the ER membrane … Rough endoplasmic reticulum 11. For life all cells have basic needs. Golgi body 3. Centriole 8. The endoplasmic reticulum forms a network of the membranous system extending from the nuclear membrane to the cell membrane. Vacuole 10. Many of the proteins are produced in quantity in the cells of the pancreas and the digestive tract and function as digestive enzymes. Chapter 4 Section 3 Cell Organelles and Features Endoplasmic Reticulum – intracellular highway • The rough ER prepares proteins for export or insertion into the cell membrane. [The Journal of … d. Absence of endoplasmic reticulum in cheek cells. Plant Cell 1. Smooth endoplasmic reticulum 11. Vesicle 4. Smooth Endoplasmic Reticulum •Similar in appearance to rough ER, but without the ribosomes. It contains enzymes and produces and digests lipids (fats) and membrane proteins; smooth ER buds off from rough ER, moving the newly-made proteins and lipids to the Golgi body, lysosomes, and membranes. Cilia and Flagella—aid in cellular locomotion. The smooth ER is not involved in protein synthesis; instead, it is the site of lipid and steroid production in the cell. Golgi Apparatus About 50% of the total membrane surface in an animal cell is provided by endoplasmic reticulum (ER). An organelle is a sub-unit within a cell that has a specialized function. Smooth ER transports materials through the cell. The endoplasmic reticulum (ER) is, in essence, the transportation system of the eukaryotic cell, and has many other important functions such as protein folding.It is a type of organelle made up of two subunits – rough endoplasmic reticulum (RER), and smooth endoplasmic reticulum (SER).The endoplasmic reticulum is found in most eukaryotic cells and forms an … All eucaryotic cells have an endoplasmic reticulum (ER). The major difference between an animal cell and a plant is that, unlike plant cells, animal cells are devoid of cell walls and chloroplast. The morphological distinction between the two is the presence of protein-synthesizing particles, called ribosomes, attached to the outer surface of the RER.The functions of the SER, a meshwork of fine tubular membrane vesicles, vary … The ER is the largest organelle in the cell and is a major site of protein synthesis and transport, protein folding, lipid and steroid synthesis, carbohydrate metabolism and calcium storage [1–7].The multi-functional nature of this organelle requires a myriad of proteins, unique physical structures and coordination with and response to changes in the intracellular … Mitochondria 6. The smooth endoplasmic reticulum, or smooth ER, is an organelle found in both animal cells and plant cells. Cisternae are long, flattened, unbranched sac-like structures having a diameter of 40-50 µm. The centriole: Animal cells have one; plant cells don't. It occurs in three different forms: Cisternae, Vesicle, and Tubules. 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