Ribosomes - seedlings not bound by a membrane synthesized...

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Ribosomes Sites of protein assembly in the cytoplasm or on the rough ER; are small (17–23 Φm) particles assembled from a large and a small subunit produced in the nucleolus; are half ribosomal RNA (rrna) and half proteins in composition; messenger RNA (mrna) brings code from a gene, attaches to rrna and initiates protein synthesis; at sites of active synthesis clusters of ribosomes are called polysomes or polyribosomes Oil bodies Spherical drops of lipids (especially triglycerides used to synthesize membranes) common in the cytoplasm of cells of seeds and fruits; used as energy and carbon sources for developing
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Unformatted text preview: seedlings; not bound by a membrane; synthesized in plastids or in the ER Flagella and cilia Singular: flagellum and cilium; extensions of cytoplasm enclosed by the plasma membrane that project from the cell wall; made of two microtubules surrounded by nine others (a 9 + 2 structure ); cilia same structure but shorter; are used as locomotor structures by algae and protists; the only flagellated cells in plants are the motile sperm of mosses, liverworts, ferns, cycads, and ginkgo...
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