What is DNA?

DNA is deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information. DNA found in the cell's nucleus as nuclear DNA.DNA is made of chemical building blocks called nucleotides.The structure of DNA is a double helix which looks like a winding staircase.DNA contains the instructions needed for an organism to develop, survive and reproduce.

Heredity is the passing of traits to offspring from its parents. This is the process by which an offspring cell or organism acquires or becomes predisposed to the characteristics of its parent cell or organism.
Replication in computing involves sharing information so as to ensure consistency between redundant resources, such as software or hardware components, to improve reliability, fault-tolerance, or accessibility.
Protein Production most genes contain the information needed to make functional molecules called proteins. (A few genes produce other molecules that help the cell assemble proteins.)

What is RNA?

What is DNA, ribonucleic acid, a nucleic acid present in all living cells.Types of RNA, Messenger RNA, Transfer RNA, Ribosomel RNA.
RNA is an acronym for "ribonucleic acid". RNA is a polymer composed of four different repeating units: Adenine, Cytosine, Guanine and Uridine (A, C, G, and U). RNA and its molecular sibling, DNA (short for "deoxyribonucleic acid") are the main information carrying molecules in all living organisms.
DNA Replication Animation - Super EASY

Heres an interesting article about DNA.