What is the length of a DNA molecule determined by?

I asked my biology teacher at school- she didn't know, I looked it up and couldn't find an answer-
Do any of you guys know?
I think it may be the number of genes??

ruler

Original post by fdhgdf4444

ruler

Obviously

Reply 3

CuriousCat567

The order of bases in the DNA molecule code for specific amino acids. Maybe the length is determined by how many amino acids are actually neded? I don't know, stab in the dark. I guess you've also got non-coding sections too. So how long is a length of string? :tongue: