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

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

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Cell Structure and Compartments
What do dystrophin, utrophin, actin, and tubulin have to do with eukaryotic cell structure and function?

They all participate in the degradation of large amounts of ATP
They all participate in the production of large amounts of ATP
They are all embedded proteins in plasma membranes
They are components in the reactions of photosynthesis

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

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

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