Which of these classes of biological molecules consist of both monomers and polymers?

Answer;

-Carbohydrates

Explanation;

-Carbohydrates are one of the four basic macromolecules of life. They are a polymer made up of monomers called monosaccharides. These building blocks are simple sugars, e.g., glucose and fructose. Two monosaccharides connected together makes a disaccharide.

-Certain carbohydrates called polysaccharides are made up of monomers called Monosaccharides. Monosaccharides cannot be hydrolyzed further to yield simpler sugars. An example of a monosaccharide would be glucose, which can polymerize into Amylose which is one of the two components of starch.

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.