6. Microtubules, motor proteins, and actin filaments are all part of

A. the mechanism of photosynthesis that occurs in chloroplasts
B. the rough ER (endoplasmic reticulum) in prokaryotic cells
C. the cytoskeleton of eukaryotic cells
D. the process that moves small molecules across cell membranes

7. A certain cell organelle which is made of a double phospholipid bilayer that has many large pores in it, is most likely

A. the nuclear envelope
B. the plasma membrane
C. the mitochondrion
D. the cytoskeleton

8. Which of the following cell organelles are expected to be associated with motor proteins?

A. Smooth ER
B. Vesicles
C. Plasma membrane
D. Chloroplasts

9. Eukaryotic cells are more efficient than prokaryotes because of their internal compartmentalization

A. makes each compartment nutritionally independent of all others
B. allows for specialization through the subdivision of particular tasks
C. allows for specialization through the merging of different tasks
D. reduces overall cell size

10. An organism’s first line of defense against attack by an invader such as a virus or bacterium is usually

A. to flee or hide
B. its body wall
C. a specific immune response
D. a nonspecific immune response