BIOS 256 Week 2 Quiz

  1.  What are the nonpolar parts of phospholipids? (Points : 3)
  2.  The polar portion of a cholesterol molecule, which forms hydrogen bonds with the polar heads of neighboring phospholipids and glycolipids, consists of a (Points : 3)
  3.  This type of membrane protein anchors cells to neighboring cells and to protein filaments found outside or inside the cell. (Points : 3)
  4.  Which of the following does NOT influence the rate of diffusion of a chemical across a plasma membrane? (Points : 3)
  5.  If the solute concentration is greater inside of the cell than outside the cell, water will move by osmosis (Points : 3)
  6.  Which of the following transport process uses vesicles formed at the plasma membrane to take up extracellular substances and import them into the cell? (Points : 3)
  7. During phagocytosis, binding of a particle to a plasma membrane receptor triggers formation of _____, which are extensions of the plasma membrane of the phagocyte that eventually surround the particle forming a phagosome. (Points : 3)
  8.  This cellular organelle is comprised of a pair of centrioles and the surrounding pericentriolar material. (Points : 3)
  9.  Which of the following membrane-enclosed organelles contains several oxidases that are involved in oxidation of fatty acids and amino acids during normal metabolism and in detoxification of chemicals like alcohol in the liver? (Points : 3)
  10. Which of the following membrane-enclosed organelles can engulf a worn-out organelle, digest its chemical components, and recycle those digested components? (Points : 3)
  11. Briefly describe the fluid mosaic model. (Points : 5)
  12. Briefly describe how proteins move through the Golgi complex. (Points : 5)