Answer and EXPLAIN 3. Whichbestdescribesthestructureofacellmembrane?a. proteins between two bilayers of phospholipidsb. proteinsembeddedinabilayerofphospholipidsc. a bilayer of protein coating a...

Answer and EXPLAIN 3. Whichbestdescribesthestructureofacellmembrane? a. proteins between two bilayers of phospholipids b. proteinsembeddedinabilayerofphospholipids c. a bilayer of protein coating a layer of phospholipids d. cholesterolembeddedinabilayerofphospholipids 4. A plant cell placed in distilled water will ______________; an animal cell placed in distilled water will ______________. a. burst ... burst b. becomeflaccid...shrivel c. become turgid . . . be normal in shape d. becometurgid...burst 5. The sodium concentration in a cell is 10 times less than the concentration in the surrounding fluid. How can the cell move sodium out of the cell? (Explain your answer.) a. passive transport b. receptor-mediatedendocytosis c. active transport d. facilitateddiffusion 6. The synthesis of ATP from ADP and P a. stores energy in a form that can drive cellular work. b. involvesthehydrolysisofaphosphatebond. c. transfers a phosphate, priming a protein to do work. d. isanexergonicprocess. 7. Facilitated diffusion across a membrane requires ______________ and moves a solute ______________ its concentration gradient. a. transport proteins . . . up (against) b. transportproteins...down c. energy and transport proteins . . . up d. energyandtransportproteins...down 8. Whatarethemaintypesofcellularwork?HowdoesATPprovide the energy for this work?