It is important for everyone to have unique DNA for everyperson on the planet because an important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is critical when cells divide because each new cell needs to have an exact copy of the DNA present in the old cell.
Two environmental factors that influence the shape of proteins are pH and temperature.
The term for when the shape of a protein is altered, is denaturation. The impact is has on the proteins ability to function, is that is changes and loses their function.
