Which of the following is not a component of cytoplasm? 

The cytoplasm is a gel-like substance that fills the interior of the cell and is enclosed by the cell membrane. It is a complex mixture of water, ions, proteins, enzymes, and other molecules.

However, the nucleus is not a component of cytoplasm. The nucleus is a separate organelle that contains the cell's genetic material (DNA) and controls the cell's growth and reproduction. Although the nucleus is found in the cytoplasm of eukaryotic cells, it is not considered a component of the cytoplasm itself.