Chapter 4

Cell membranes consist mainly of a ___________. a. carbohydrate bilayer and proteins b. protein bilayer and phospholipids c. lipid bilayer and proteins

Organelles __________. a. are membrane-bound compartments b. are typical of eukaryotic cells, not prokaryotic cells c. separate chemical reactions in time and space d. All of the above are features of organelles.

Cells of many protists, plants, and fungi, but not animals, commonly have ___________. a. mitochondria b. a plasma membrane c. ribosomes d.a cell wall

Is this statement true or false: The plasma membrane is the outermost component of all cells. Explain your answer.

Unlike eukaryotic cells, prokaryotic cells ___________. a. lack a plasma membrane b. have RNA, not DNA c. have no nucleus d. all of the above

Match each cell component with its function. $$ \text {________mitochondrion} \quad \quad\quad\quad\quad \text {a. protein synthesis} $$ $$ \text {________chloroplast} \quad \quad\quad\quad\quad \text {b. initial modification of new polypeptide chains.} $$ $$ \text {________ribosome} \quad \quad\quad\quad\quad \text {c. modification of new proteins; sorting, shipping tasks} $$ $$ \text {________rough ER} \quad \quad\quad\quad\quad \text {d. photosynthesis} $$ $$ \text {________Golgi body} \quad \quad\quad\quad\quad \text {e. formation of many ATP} $$