If DNA can not be seen then how do scientists know for sure that it exsist

Subject: If DNA can not be seen then how do scientists know for sure that it exsist

Date: Mon Feb 28 10:22:16 2000
Posted by Danielle
Grade level: 7-9 School: South Knox High School
City: Vincennes State/Province: Indiana Country: USA
Area of science: Genetics
ID: 951754936.Ge

Message:


 In class we are learning about DNA. I understand the form of it, and how 
it was discovered. But, I don't understand how a X-ray can prove that it 
is a double helix. I was hoping you'd be able to explain it to me as how 
they know it's like it is, and not diffrent.

Re: If DNA can not be seen then how do scientists know for sure that it exsist

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