A glucose molecule is to carbohydrates as a ___ is to nucleic acids.

nucleotides

Explanation:

glucose is a monomer of carbohydrates so we just have to figure out what the monomer for a nucleic acid is.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.