Proteins are the biological molecules that make things work in living systems. We could say that they are involved in every process in the cell. They are controllers of biochemical reactions, structural elements that hold parts of the cell together, motors that make things move, signals, and so forth. The function of a protein depends almost entirely on its shape. Its three dimensional shape determines its physical and chemical properties, which in turn allow the protein to serve its unique function. The three dimensional shape of a protein, in turn, depends almost entirely on the linear sequence of the building blocks of life, the amino-acids.
There are 20 kinds of amino-acids. An average protein might have a few hundred amino-acids. So, proteins are the work horses, and their function is determined by its chemical sequence of amino-acids. Now, how do we get a protein of a particular sequence built? What is the blueprint that is used to build proteins? The answer is DNA.DNA is the molecule that holds genetic material in living things.What is the function of DNA in the cells of living organisms?
DNA store and transmet genetic information.
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What is the function of DNA in the cells of living organisms?DNA is the genetic code of living organisms. It contains all the information that tells the organism what to make and where to make it depending on the sequence of nucleotides, which is unique to each organism. For example, it will tell one person to make blue eyes whereas it will tell another person to make brown eyes.
DNA is the "blueprint of life" - it codes for everything and every cell that makes up an organism. DNA is essential for life. That is why a mutation in DNA can cause harmful effects.
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