The endoplasmic reticulum (ER) is an organelle in some cells. In these cells, it

Question

The endoplasmic reticulum (ER) is an organelle in some cells. In these cells, it is continuous with the nuclear membrane and forms a large part of the cell's total membrane. Sort the phrases below as describing rough ER, smooth ER, both, or neither. Note: If you answer any part of this question incorrectly, a single red X will appear indicating that one or more of the phrases are sorted incorrectly. Rough ER Smooth ER Both Neither bound with ribosomes "packages" enzymes in vesicles for secretion involved in involved in protein synthesis protein-folding process occurs in lumen involved in toxin found in prokaryotes and eukaryotes enclose the lumenor drug metabolism (cisternal space)

Explanation / Answer

Rough ER: bound with ribosomes

involved in protein synthesis

enclose the lumen (cisternal space)

protein folding process occurs in lumen

"packages" enzymes in the vesicle for secretion

Smooth ER: involved in lipid synthesis

involved in toxin or drug metabolism

Both:

Neither: found in prokaryotes and eukaryotes

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