Bio1100 Chapter 4 Chap 3   A tour of the cell   Chap 5
  1. Living organisms are made of cells  , with or without a nucleus.





     
  2. The plasma   membrane that encloses all cells consists of a phospholipid bilayer   .



     
  3. The nucleus   contains the hereditary material DNA   and serves as the genetic control center.

     
  4. The endomembrane   system forms a connected network of membranous organelles within the cell.





     
  5. The mitochondrion is the site of cellular respiration  , providing energy for the cell.

     
  6. Plant cells have several structures not present in animal cells.
     
    • The chloroplast is the site of photosynthesis   .

       
    • A central vacuole   provides storage.

       
    • Cell walls   support and protect the cell.


     
  7. The interior of the cell is supported by a network of protein fibers called the cytoskeleton   .

     
  8. Materials pass into and out of the cell passively through diffusion   and osmosis  .





     
  9. Active   transport requires energy to move substances up   (against) concentration gradients.

     
  10. Large substances move into and out of the cell through endocytosis and exocytosis without crossing the plasma   membrane.