Why do phospholipids form sheet-like cellular membranes, despite being partly hydrophilic?
a. The modified phosphate group forms covalent bonds with adjacent phospholipids in a sheet-like configuration.
b. Cellular membranes form at the water’s surface, with hydrophobic fatty acids extended into the air above.
c. The long fatty acid chains weave together like a tapestry, pulling the phosphate groups together in sheets.
d. Only the phosphate group can interact with water; fatty acids are forced together in the middle of double sheets.
d. Only the phosphate group can interact with water; fatty acids are forced together in the middle of double sheets.
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Phagocytosis is a form of ____
a. diffusion b. endocytosis c. exocytosis d. osmosis e. facilitated diffusion
Vimentin is the major intermediate filament protein of _______ cells.
a. epithelial b. striated muscle c. nerve d. fibroblast e. None of the above
The term ________ (from Greek words meaning "cell movement") refers to the division of the cytoplasm
Fill in the blank(s) with correct word
Proton motive force can be used for
a. transport of molecules into or out of the cell. b. cell locomotion. c. generating ATP. d. all of the above.