Cell Structure and Compartments
The highly folded membranes found in such eukaryotic organelles as mitochondria and chloroplasts

help the cell against physical damage
increase the surface area where key chemical processes can occur
make it possible to package large amounts of DNA within the cell
assist with cell movement

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

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

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

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

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Cell Structure and Compartments
According to the fluid mosaic model of cell membranes,

the most common type of molecules in the membrane are proteins
the membrane is a highly mobile mixture of phospholipids and proteins
the unique properties of cell types are determined by their phospholipids
basic membrane structure results from how the proteins interact with water

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

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

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