Answer: Sugar and phosphate
What makes up the backbone of the "ladder"?

A backbone chassis is a type of automotive construction with chassis that is similar to the body-on-frame design. Instead of a relatively flat ladder-like structure with two longitudinal parallel frame-rails it consists of a singular central strong tubular backbone (usually rectangular in cross-section) that carries the power-train and connects front and rear suspension attachment structures .

Backbone tube chassis is a type of automobile construction chassis that is similar to the body-on-frame design. Instead of a two-dimensional ladder -type structure it consists of a strong tubular backbone (usually rectangular in cross section) that connects the front and rear suspension attachment areas. A body is then placed on this structure. It was first used in the English Rover 8hp of ...

Backbone chassis - Wikipedia

Vehicle frame - Wikipedia

Backbone chassis - Wikipedia

Polymer - Wikipedia

DNA is a long polymer made from repeating units called nucleotides each of which is usually symbolized by a single letter: either A T C or G. Chargaff's rules state that DNA from any species of any organism should have a 1:1 protein stoichiometry ratio (base pair rule) of purine and pyrimidine bases (i.e. A+T=G+C) and more specifically that the amount of guanine should be equal to ...

A chassis (US: / ˈ tʃ æ s i / UK: / ˈ ʃ æ s i /; plural chassis /-...


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