Biol 103 Exam 3

  1. What did Gorter and Grendel find in their 1925 experiment?
    That the plasma membrane occupies twice the area expected
  2. Which of the following components is NOT needed to build a plant cell wall?
  3. Which of the following proteins do NOT pass through the golgi apparatus?
    Ribosomal proteins
  4. Where are the majority of mitochondrial genes?
  5. The major protein of the extracellular matrix of animal cell is 
  6. During some forms of stress, an unfolding response occurs in the ER and involves
    all of the above
  7. Which of the following is NOT true of ion channels?
    Most ion channels are permanently open
  8. Which of the following statements is FALSE about mitochondria?
    proton concentration is highest in the matrix
  9. Coupled transport of glucose and Na+ into intestinal epithelial cell is an example of
    a symport
  10. Which of the following organelles have double membranes?
    Mitochondria and chloroplasts, but not peroxisomes
  11. The majority of mitochondrial proteins are synthesized on
    free cytosolic ribosomes
  12. The associations of lamins with the inner nuclear envelope membrane is via...
    lamin binding to proteins in the nuclear membrane AND lipid tails on lamins
  13. Newly synthesized ER membrane lipids are found in both halves of membrane bilayers because they are...
    synthesized at one surface and flipped to the other surface by proteins called flippases
  14. Facilitated diffusion requires
    carrier proteins
  15. snoRNAs are synthesized in the...
    nucleolus, move to the cytoplasm to pick up proteins to become functional, and then return to the nucleus
  16. The nuclear envelope is continuous with the...
    rough endoplasmic reticulum
  17. Branching of actin filaments can be initiated by
  18. Which of the following is TRUE about motor proteins on microtubules (MTs)?
    They transport membranous vessicles and mitochondria
  19. Intermediate filaments function in...
    all of the above (cell motility, providing mechanical strength for cells, nuclear pore structure)
  20. During muscle contraction, the A band
    stays the same width and the I band and H band shorten
  21. Plant cell walls are cellulose fibrils in a matrix of 
    hemicellulose and pectin
  22. Where are the most mitochondrial phospholipids synthesized?
  23. Most snoRNPs function in...
    aligning regions of rRNA with complementary sequence for modification
  24. Gram positive bacteria have...
    thick peptidoglycan wall outside of the plasma membrane
  25. Which of the following contain their own DNA
    mitochondria, chloroplasts, but not peroxisomes
  26. Many neurons need constant firing to maintain active synapses; therefore, to recall memories the most important method to stimulate this mechanism is...
  27. The basement membranes of epithelial sheets contain a matrix of adhesion molecule called...
  28. Where is ATP synthase?
    Inner mitochondrial membrane
  29. In the classic 1960s experiment, what did Palade and colleagues establish with radiolabeled proteins in the golgi of pancreatic cells?
    The secretory pathway: Rough ER -> Golgi -> Secretory Vessicles -> Cell exterior
  30. How do different polypeptides get targeted to specific regions within the cell?
    The inclusion of amino acid localization signals.  Specific series of amino acids that mark the polypeptide for a specific region or organelle.  These AAs are identified by signal recognition proteins that assist with delivery to the proper location within the cell.
  31. What
Card Set
Biol 103 Exam 3
Cell Bio 3