Carbohydrates are oxidized hydrocarbons and hydrocarbons are reduced carbohydrates.

They can be and they are interconverted, both in living beings and in the industry.

In paper, most of the wood components except cellulose have been removed, so paper usually consists mostly of carbohydrates.

In general any adhesive is neither a hydrocarbon nor a carbohydrate, but a derivative of them. Natural adhesives are usually derived either from proteins, e.g. various kinds of animal glues, or from starch or from various kinds of gums or of resins or of latex.

Bitumen has been used as an adhesive that consists mostly of hydrocarbons, but it also includes some oxidized components that provide most of the adhesion, as pure hydrocarbons have lubricating properties, not adhesive properties.