The sides of the dna molecule, the rails of the ladder, are composed of
a. phosphates only.
b. nitrogenous bases only.
c. phosphates and sugars.
d. nitrogenous bases and sugars.

The answer is letter C. The sides of the DNA molecule, the rails of the ladder, are composed of phosphates and sugars.

DNA strands constitute chemicals called nucleotides. DNA molecules on the other hand  are made up of 2 polynucleotide chains. This polynucleotide is arranged on the backbone, the double helix.  These nucleotides (polynucleotide and nucleotides) are composed of three parts: a phosphate, a sugar (deoxyribose), and a type of compound base.  Deoxyribose and phosphate creates the backbone of the side of the ladder, nucleic acid while the base join both polynucleotide chains like the rungs of the ladder.  

I'm sorry to hear that. i will try to answer your other questions if it is within my ability. : )answers: my favourite colour is black.my favourite food is pasta.my favourite school subject is english, but i do also like lunch time.my least favourite subject is history as well as geography. i have currently garnered a quite equal hatred for both of the subjects.what about you? well, you for the points. : )

Ithink b hope that