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E.r., The Golgi Body And
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Thousands of structures with membranes crowd the eukaryotic cytoplasm, the most numerous being called the endoplasmic reticulum (ER), a dense network of membranes running through the cytoplasm of every cell and enclosing a network of interconnected tubes (cisternae), which form a connecting channel ....
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....biochemical reactions. Other ER enzymes are located within the ER lumen.
If labelled amino acids are introduced into live cells, the radioactivity first appears in the ribosomes. Within a few minutes it is found in the membrane enclosed sacs of the rough ER. The reason for this is that proteins are produced at the ribosomes, threaded through the membrane, and are stored temporarily in the sacs of the rough ER before they are used inside the cell or are secreted to the exterior.
The SER produces .... |
| Number of words: 1185 |
Approximate pages: 5 |
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