Nucleolus:

an organelle within the nucleus - it is where ribosomal RNA is produced.

Nucleus:

 The nucleus controls many of the functions of the cell (by controlling protein synthesis) and contains DNA (in chromosomes). 

Mitochondrion: 

 The mitochondrion converts the energy stored in glucose into ATP (adenosine triphosphate) for the cell. It is the powerhouse of the cell.

Cell Membrane

selectively regulates the flow of materials into and out of the cell- thus maintaining chemical homeostasis. 

Golgi Apparatus

synthesizes, packages, and secretes cellular packages. Packages waste and harmful materials.

Lysosome

digests bacteria and some foods entering the cell. Breaks down worn out cell organelles.