What Is DNA And Why Does It Matter?

An organism’s genetic code is stored in a molecule called deoxyribonucleic acid, more generally referred to as DNA. DNA is found in every cell of every organism. All of a multicellular organism’s DNA may be found in practically every single cell. Apart from defining life’s form and function, DNA is the main unit of inheritance in all kinds of creatures. A part of the DNA of organisms is passed on to their children when they reproduce. DNA may be transmitted from one generation to another in this way, which helps maintain a sense of continuity while also allowing for little modifications that provide variety.

Where Is DNA Found?

DNA resides in the nucleus of eukaryotic species, which are classified as multicellular organisms. Because of the small size of the cell and the high number of DNA molecules that are found in each cell of an organism, DNA molecules have to be tightly packed. A chromosome is a scientific name for this DNA-packaging structure. DNA unwinds during replication so that it may be replicated. It is also possible to employ DNA’s instructions to manufacture proteins and other biological activities at different points in the cell cycle. But DNA gets compacted into its chromosomal form during cell division to transfer to other cells.

Nuclear DNA is the term used by scientists to describe the DNA contained in the cell’s nucleus. The term genome is used when referring to an organism’s whole nuclear DNA. Additionally, mitochondria, a component inside the cell that houses a little amount of DNA, is present in sophisticated organisms like humans and other animals. A cell’s energy supply is provided by mitochondria, which are located in the cell’s nucleus. A child of a man and a woman share half of their nuclear DNA during sexual reproduction. On the other hand, the female parent is the only source of an organism’s mitochondrial DNA. Only the egg cells retain their mitochondria during fertilization, not the sperm cells.

What Are The Building Blocks Of DNA?

There are two types of nucleotides: phosphate and guanine. Phosphate, sugar, and one of four nitrogen bases make up these building ingredients. A strand of DNA is created when nucleotides are joined into strands, with the sugar and phosphate groups switching places at regular intervals.

Adenine (A), guanine (G), thymine (T), and cytosine (C) are the four nitrogen bases present in nucleotides (C). A DNA strand’s biological instructions are encoded in the order in which these nucleotides are arranged. As an example, the sequence ATCGTT may be used to get blue eyes, whereas ATCGCT might be used to achieve brown. Approximately 3 billion bases and 20,000 genes make up a human’s full DNA instruction manual or genome.

What Does DNA Do?

The instructions for an organism’s development, survival, and reproduction are contained in its DNA. The complex molecules that accomplish the majority of the work in our bodies are made from proteins, which are complex molecules made from DNA sequences.

It’s called a gene when a DNA sequence includes instructions for protein production. Genes in humans may range in size from as little as 1,000 bases to as much as 1 million bases. One-hundredth of one percent of the DNA sequence is made up of genetic material. Outside of this 1%, DNA sequences control when, how, as well as how much protein is produced.

How Are Proteins Made From DNA Sequences?

Proteins are synthesized by following the instructions found in DNA. Enzymes read DNA molecules and transcribe the information into an intermediate form of mRNA, which is then used by cells to build proteins. Amino acids are building blocks of proteins, and mRNA molecule information is translated into amino acid “language.” Using this language, a cell’s protein-making machinery is instructed on the exact sequence of amino acids to be linked to create the desired protein. Amino acids, which may be arranged in a zillion different ways to make a variety of proteins, are an enormous challenge because of this.

Who Discovered DNA?

Frederich Miescher, a Swiss scientist, discovered DNA in the late 1860s. In the time since that discovery, scientists have made significant progress in our understanding of DNA’s structure and its role in life. Life’s biological instructions were contested for many years by scientists. A common misconception was that DNA was too basic to perform such an important role. Instead, they claimed that proteins’ higher complexity and diversity of forms made it more probable that they would carry out this critical role.

James Watson, Maurice Wilkins, Francis Crick, and Rosalind Franklin all contributed to the discovery of DNA’s significance in 1953. DNA’s double helix shape has been discovered via X-ray diffraction patterns and the construction of models. This structure allows DNA to transmit biological information from generation to generation.

DNA Helps Your Body Grow

Proteins critical for development and life may be generated by reading this code three bases at a time. A gene is a name given to the DNA sequence that contains the instructions needed to generate a protein. Each of the three groups of bases corresponds to a different amino acid, which is the building block of proteins. The amino acids tryptophan and glycine are designated by the base pairs T-G-G and G-G-C, respectively.

The protein sequences T-A-A, T-A-G, and T-G-A all signify the end of the protein’s amino acid sequence, as do others. In this case, the cell is instructed not to add any additional amino acids to the protein because of this instruction. Each protein has a unique set of amino acids. Proteins have distinct structures and functions when they are put together in the proper sequence.

How Is the DNA Information Translated into A Protein?

DNA strands first broke apart. The base pairs on a DNA strand are read by specialized proteins located in the nucleus, which results in the production of an intermediate messenger molecule. The messenger RNA is synthesized in this manner (mRNA). Additional types of nucleic acids include mRNA. It signals to the cellular machinery that creates proteins by traveling beyond the nucleus. During the second phase, specialized cell components read three base pairs of the mRNA’s message one at a time and work to construct a protein, one amino acid at a time. The translation is the term used to describe this activity.

When Your Cells Divide, What Happens?

Cell division is a typical element of the process of growth and development in your body. In order for this to happen, a new cell must have a full copy of its DNA. Your DNA must undergo replication in order to do this. The two DNA strands separate as a result of this. Each strand is then used as a template by particular cellular proteins to generate a new DNA strand. After replication, there are now two molecules of DNA that are each composed of two strands. When cell division is complete, one set will be placed in each new cell.


The role of DNA in human development, reproduction, and health cannot be overstated. Using this information, your cells can make proteins that impact a wide range of bodily operations and activities. Damage or mutations to DNA may occasionally lead to disease development. Mutations, on the other hand, may be useful and add to our variety, as long as we keep that in mind as well. One DNA strand is used as a template for the synthesis of a complementary strand in order to duplicate the genetic information. All of an organism’s protein synthesis instructions are encoded in the genetic information contained in its DNA. In eukaryotes, the cell nucleus houses the DNA.

Prohormones also work in a similar way. You can know more about it in the prohormone guide.