The nucleus is the very dense region consisting of protons and neutrons at the center of an atom.


a non-membrane bound structure found in the nucleus of cells. It is composed of proteins and nucleic acids found in the nucleus of eukaryotic cells. Its function is to transcribe ribosomal RNA (rRNA) and combine it with proteins to form almost-complete ribosomes.

Cell Membrane

is a biological membrane that separates the interior of all cells from the outside environment.

Cell wall

The cell wall is the tough, flexible but sometimes fairly rigid layer that surrounds some types of cells


The cytoplasm comprises cytosol – the gel-like substance enclosed within the cell membrane – and the organelles – the cell's internal sub-structures


The mitochondrion (plural mitochondria) is a membrane-enclosed structure found in most eukaryotic cells (the cells that make up plants, animals, fungi, and many other forms of life).[


Golgi cells are inhibitory interneurons found within the granular layer of the cerebellum.

Smooth E.R.

The smooth endoplasmic reticulum has functions in several metabolic processes, including synthesis of lipids, metabolism of carbohydrates and calcium

Rough E.R.

Rough E R (RER) is involved in some protein production, protein folding, quality control and dispatch.


is a large and complex molecular machine, found within all living cells, that serves as the primary site of biological protein synthesis


A vacuole is a membrane-bound organelle which is present in all plant and fungal cells and some protist, animal and bacterial cells.


are organelles, specialised subunits, in plant and algal cells. One of their main roles is conducting photosynthesis, where chloroplasts capture the energy from sunlight, and store it in the energy storage molecules ATP and NADPH while freeing oxygen from water