alleryStart learning →The cytoplasm occupies the region between which two structures?
AThe plasma membrane and nuclear envelope
BThe nuclear envelope and the nucleolus
CThe plasma membrane and the cell wall
DThe Golgi apparatus and the lysosomes
Answer & Solution
Correct answer: A. The plasma membrane and nuclear envelope
1. Cytoplasm is defined by the two boundaries that enclose it.
2. Its outer boundary is the plasma membrane and its inner boundary is the nuclear envelope.
3. Within that region sit the organelles, suspended in gel-like cytosol along with the cytoskeleton and various chemicals.
4. The nucleolus lies inside the nucleus, so it is beyond the inner boundary and cannot mark it.
5. The cytoplasm lies between the plasma membrane and the nuclear envelope.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.3 Eukaryotic Cells_
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