FUNCTION: providing a supporting framework within the cell
FUNCTION: are used to move things from one place in the cell to another
FUNCTION: Lysosomes repair wounds in the plasma membrane.
Notice the extra chromosome 21
Notice the double helix....
FUNCTION: Chromosomes contain all the genes - the genes determine the properties/functions of a cell.
A gene is a portion on a chromosome that can be used to make a specific type of RNA molecule.
See here on how a gene "express" itself: click here
FUNCTION: they translate the information encoded in messenger RNA (mRNA) into a polypeptide
FUNCTION: Their main function is the conversion of the potential energy of food molecules into ATP (energy molucle of living organism)
The way a living cell extracts enertgy from ATP molecule is through the "Citric Acic Cycle":
An extremely interesting fact about mitochondria:
They cannot be formed in a cell that lacks them because the nuclear genes encode only some of the proteins of which they are made - but not all !!!