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What triggers the contraction of a muscle cell when a nerve impulse stimulates it?
What triggers the contraction of a muscle cell when a nerve impulse stimulates it?
Which structure regulates the entry and exit of most proteins and RNAs in a cell?
Which structure regulates the entry and exit of most proteins and RNAs in a cell?
What maintains the shape of the nucleus by mechanically supporting the nuclear envelope?
What maintains the shape of the nucleus by mechanically supporting the nuclear envelope?
Where is ribosomal RNA assembled with protein to form ribosomal subunits?
Where is ribosomal RNA assembled with protein to form ribosomal subunits?
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What separates the internal compartment of the endoplasmic reticulum from the cytosol?
What separates the internal compartment of the endoplasmic reticulum from the cytosol?
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