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Informative Speech On Dna

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DNA has a massive job of keeping you alive. In essence, a microscopic strand of genes support your entire body and life. There are many smaller jobs protein has to accomplish that combine to accomplish the main job of supporting life. To start, DNA codes for proteins and every protein provide an essential biological function. Also, cells make up tissues, organs, and body systems. Body systems interact with each other to maintain homeostasis. To start, let 's talk about what DNA actually is. DNA looks like a long spiral staircase. That structure is called a double helix. DNA is located in the nucleus of a cell. The nucleus is generally in the center of a cell. A typical cell nucleus is so small that ten thousand could fit on the tip of a needle. One strand of DNA is around 6 feet long. This mean that 6 feet of DNA fits inside the nucleus, which occupies about 10% of a total cell (https://en.wikipedia.org/wiki/Cell_nucleus), of a microscopic cell. For this to happen eight separate histone protein subunits attach to the DNA molecule to …show more content…

The newly made mRNA strand travels out of the nucleus to a ribosome where the directions can be made into a protein. A ribosome is composed of one large and one small subunit that assemble around the mRNA. The mRNA now passes through the ribosome. Now, amino acid building blocks are carried into the ribosome attached to specific transfer RNA (tRNA) molecules. The small subunit of the ribosome arranges the mRNA so that it can be read it segments of 3 nucleotides. A group of 3 nucleotides is called codons. Each codon on the mRNA molecule matches a corresponding anti-codon on the base of a tRNA molecule. The tRNA anti-codon attaches to the mRNA codon. Then, the larger subunit of the ribosome disconnects an amino acid from a corresponding tRNA molecule and adds it to the growing protein chain. When the mRNA is completely decoded a protein is made

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