Matter in Our Surroundings — Science STD 9 — Question

4. Cytoplasm is called as protoplasm.

Explanation:
Along with the function of secretion of various enzyme proteins and producing vacoules, Golgi apparatus is also involved in the synthesis of cell wall, plasma membrane and lysosome.
Nucleus, mitochondria and plastids have their own genome (i.e., DNA) and ribosomes. They are self replicating organelles i.e., they have power to divide and are able to synthesise their own structural protein (semi autonomous organelles). Mitochondria is site of cellulose respiration and synthesis of energy rich compounds (ATP). Therefore it is called as power house of the cell. The part of cell which between the plasma membrane and nuclear envelope is called the cytoplasm.