Final answer:
The statement is true; the cytoplasm includes a fluid matrix called the cytosol, which contains dissolved substances, organelles, and the cytoskeleton, positioned between the cell membrane and the nucleus.
Step-by-step explanation:
The cytoplasm includes a fluid matrix known as the cytosol, which contains dissolved substances and is also home to organelles and the cytoskeleton. It is indeed found between the cell membrane and the nucleus. The cytoplasm is a gel-like substance that accounts for 70 to 80 percent water, adding to its semi-solid consistency primarily due to the proteins found within it. Besides proteins, the cytoplasm is rich in various organic molecules such as glucose, simple sugars, polysaccharides, amino acids, nucleic acids, fatty acids, and derivatives of glycerol.
This intracellular environment facilitates various metabolic reactions, including the critical process of protein synthesis, enabling the survival and functioning of cells. The cytoskeleton within the cytoplasm is an intricate network of protein fibers, including microfilaments, intermediate filaments, and microtubules, which provide structural support, maintain the cell's shape, secure organelles in place, and enable movement within the cell and for unicellular organisms themselves.