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the genetic material, DNA, essentially codes for everything in the cell. It codes for all proteins made, and the end result is that it has instructions for how everything is, from outward traits such as hair color to other traits such as the volume of blood produced. It is the instruction book of the body

2006-11-19 06:39:32 · answer #1 · answered by cero143_326 4 · 0 0

Deoxyribonucleic acid (DNA) provides a stable template for the production of ridonucleic acid (RNA). DNA is a double stranded molecule and is considered more stable than the normally single stranded RNA. The sequence of bases that are part of DNA's structure give rise to the genetic code. An enzyme called RNA polymerase binds to the DNA and as it passes along the DNA it recognises the bases along one of the strands of DNA and utelises complementary bases in the production of a strand of RNA (where the DNA has a C the complementary RNA has a G and vice versa and where DNA has an A the complementary RNA has a U while where the DNA has a T the complementary RNA would have an A. The base Thymine is not present in RNA, its equivalent being Uracil).
Some of the strands of RNA produced contain sequences that will be used in the production of protein, these strands are called messenger RNA (mRNA for short). mRNA interacts with a type of RNA called transfer RNA (tRNA) which carry an amino acid, the amino acids are the bits that go into the production of proteins. A structure known as the ribosome moves down the mRNA and as it does so tRNA is brought into contact with the mRNA at the site of the ribosome. Which tRNA comes into contact with the mRNA depends on the sequence of the mRNA, which as I explained earlier is determined by the DNA. At the site of the ribosome two tRNA molecules can be present and as they are brought close together the amino acid from one will bind to the amino acid of the other, the one without an amino acid can now leave, the ribosome budges up and a new tRNA comes in. The chain of amino acids is connected on to the amino acid of the new tRNA and so the process continues. In this way proteins are generated and the sequence and structure of these proteins can be traced back ultimately to the DNA.
This makes DNA highly important because protiens are the class of molecules that include enzymes (responsible for the chemical reactions in the body) there are also structural proteins hormones are protein etc etc.
Having said all of this there are many overblown claims about what is determined by our genes and the importance of the environment is all too often overlooked, a quick example, although there is a genetic component to height a healthy at a young age also plays a major role, often having a far greater impact than the role of the genes. As for intellegence, the whole area is a minefield both scientifically and politically but a large number of respected scientists would argue that the genetic factors are not as strong as the environmental factors in the majority of cases.

2006-11-21 07:16:09 · answer #2 · answered by Bill T 2 · 0 0

Genetic material in a cell ensures that when the cell divides, the resulting cells are the exact copy of that first cell.

2006-11-19 15:56:05 · answer #3 · answered by wilde_space 7 · 0 0

To serve their sentence for breaking the law like the bad girls or boys they are.

2006-11-19 14:42:51 · answer #4 · answered by ♥Robin♥ (Scot,UK) 4 · 0 0

DNA and determine physical, mental and other characteristics of the human being

2006-11-19 14:35:38 · answer #5 · answered by Anonymous · 0 0

It makes you look the way you do

2006-11-19 14:39:23 · answer #6 · answered by cassie8415 1 · 0 0

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