The smallest cell structure that would most likely be visible with a standard (not super-resolution) research-grade light microscope is

The smallest cell structure that would most likely be visible with a standard (not super-resolution) research-grade light microscope is 






A) a mitochondrion.
B) a microtubule.
C) a ribosome.
D) a microfilament.
E) a nuclear pore.






Answer: A


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