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

Backbone chassis - Wikipedia

Vehicle frame - Wikipedia

Backbone chassis - 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. The structure of DNA is dynamic along its length being capable of coiling into tight loops and other shapes. In all species it is composed of two helical chains bound to each other by hydrogen bonds. Both chains are coiled around the same axis and have the same pitch of 34 angstroms (Å) (3.4 nanometres). The pair of chains have a radius...


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