Comprehension Passage
DNA is the genetic material in most organisms on earth. It is a long polymer and is double-helical in structure. DNA store information in form of genetic code which is formed from the different combinations of nitrogenous bases, ATGC. DNA is not stable at high temperatures and ph.
Which of the following is not present in DNA?
1
Ribose sugar
2
Phosphate
3
Mg2+
4
Guanosine triphosphate