Which structures are surrounded by lipid membranes in eukaryotic cells? ribosomes nucleus endoplasmic reticulum cytoskeleton mitochondria
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84. Which of the following is NOT included in the cytoplasm of a eukaryotic, phytoplankton cell? a. chromatin (DNA material) b. ribosomes c. endoplasmic reticulum d. mitochondria e. microtubules forming a centriole 85. The cell nucleus: a. is absolutely isolated from the cytoplasm by the nuclear membrane b. houses the cell's hereditary information c. is the site of protein synthesis d. serves as a packaging and distribution center for substances manufactured in the rough endoplasmic reticulum e. provides the cell with energy 86. Which of the following statements applies to the structure of cellular membranes? a. all organelles have the same membrane structure, which differs from that of the outer cell membrane b. all cellular membranes are composed of lipids and negatively charged amino acid residues c. all cellular membranes are composed of a double layer of polysaccharides with embedded proteins d. only the cellular membranes of closely related species have similar structures e. all cellular membranes, including those of organelles (with perhaps one exception), have the same basic structure (building block molecules) 87. Which of the following is NOT descriptive of endoplasmic reticulum? a. passageway for intracellular communication b. attachment site of ribosomes c. network providing structural support d. composed of flattened sacs, tubes and channels e. continuous with the nuclear membrane 88. T or F--Cells that make large amounts of protein will probably have many ribosomes and large amounts of RNA. 89. Lysosomes are: a. single-layered phospholipid membranous sacs containing destructive enzymes b. formed in the smooth endoplasmic reticulum c. a type of vacuole formed by the Golgi Body d. the sites of protein synthesis in prokaryotic cells e. vesicles containing substances for export that are formed in the rough endoplasmic reticulum 90. Which eukaryotic cell organelle is involved in supplying energy to cells? a. Golgi Bodies b. Ribosomes c. Lysosomes d. Mitochondria
Adi S.
Kaela P.
Which structure provides energy to the cell? A. Cytoskeleton B. Mitochondria C. Ribosomes D. Endoplasmic membrane
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