Cell Structure and Compartments
An organism's first line of defense against attack by an invader such as a virus or bacterium is usually

to flee or hide
a nonspecific immune response
a specific immune response
its body wall

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Cell Structure and Compartments
Lysosomes are specialized vesicles in __________ that contain digestive enzymes for the breakdown of food. A related organalle known as a vacuole, which is found in __________ , also contains enzymes but in addition may act as a storage organelle for nutrients or water.

animals and plants; fungi
plants; animals and fungi
plants and fungi; animals
animals; plants and fungi

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Cell Structure and Compartments
Eukaryotic cells are more efficient than prokaryotes because their internal compartmentalization

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

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Cell Structure and Compartments
Microtubules, motor proteins, and actin filaments are all part of

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

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Cell Structure and Compartments
Which of the following statements about prokaryotes is false?

Prokaryotic cells are much smaller than most eukaryotic cells
Prokaryotic cells concentrate important materials for the cells survival
Ancient prokaryotes may have given rise to some eukaryotic organelles
The substance known as cytosol is found within the bacterial nucleus

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