a. serves as the internal transportation system of a cellb. is the inner membrane of the mitochondriac. is characterized by the presence of ribosomes throughoutd. manufactures ATPe. stored DNAWhich of the following are sometimes referred to as rough or smooth, depending on the structure?a. Golgi bodiesb. ribosomesc. mitochondriad. lysosomese. endoplasmic reticulaWhich of the following are the primary structures for the packaging of cellular secretions for export from the cell?a. Golgi bodiesb. ribosomesc. mitochondriad. lysosomese. endoplasmic reticulaWhich of the following contain enzymes and are the main organelles of intracellular digestion?a. Golgi Bodiesb. ribosomesc. mitochondriad. lysosomese. endoplasmic reticulaWhich of the following cell organelles is responsible for disposal of hydrogen peroxide?a. Golgi bodiesb. ribosomesc. mitochondriad. lysosomese. endoplasmic reticulaFluid filled sacsthat may store food, ions or water in cells are called?a. plastidsb. vacuolesc. microvillid. nucleolie. Golgi bodiesOnly plant cells possessa. a central vacuoleb. plastidsc. granad. stromae. all of theseIf a biologist said that the human body might be getting its power from bacteria he would be referring toa. energy cells that utilize bacteria for producing energyb. bacteria in our intestinal tract that digest food to supply us with energyc. the mitochondria in our cells that may have originated as endosymbiotic bacteriad. the E. coli throughout the human body that produce ATPe. the bacteria on the skin that can trap the sun's energy for our use.Which of the following is throught to be the descendant of ancient bacteria that were engulfed by a cell?a. nucleib. Golgi bodiesc. ERd. mitochondriae. lysosomesStructural features which contains proteins that help to control the shapes of cells area. plastidsb. vacuolesc. microvillid. nucleolie. microfilamentsWhich organelle is whiplike in structure and function?a. microfilamentb. intermediate filamentc. microvillusd. flagellume. microtubuleWhich of the following junctions permits cytoplasmic interconnection between cells?a. gap junctionsb.plamodesmatac. adhering junctionsd. only gap junctions and plasmodesmatae. gap junctions, plasmodesmata, and adhering junctionsPlasmodesmata are related toa. gap junctions in animal cellsb. tight junctions in bacteriac. wall junctions in plantsd. adhering junctionse. both tight junctions in bacteria and adhering junctions

Really? I already did one of these for you. Go do your homework! It's very easy - for the first one just google endoplasmic reticulum. For the last one just google plasmodesmata. Seriously - put some effort into your own work!

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Endoplasmic reticulum (ER) is repsonible for production of protein and lipid composition of most of the cell organelles. Emergency room contains a large number of folds - but the formation of a closed membrane-page single closed path. The interior space is called the ER lumen. ER is also responsible for moving proteins and other carbohydrates in the Golgi to the plasma membrane to the lysosomes, or other local needs.