1) A biochemical reaction that results in a net release of energy and the breakdown of a large organic molecule into smaller constituents can be described as:

a.     Exergonic and catabolic

b.     Exergonic and anabolic

c.     Endergonic and catabolic

d.     Endothermic and catabolic

e.     Endergonic and anabolic

 

Catabolic reactions break down large organic molecules into smaller molecules, releasing the energy contained in the chemical bonds. These energy releases (conversions) are not 100 percent efficient. The amount of energy released is less than the total amount contained in the molecule. Approximately 40 percent of energy yielded from catabolic reactions is directly transferred to the high-energy molecule adenosine triphosphate (ATP). ATP, the energy currency of cells, can be used immediately to power molecular machines that support cell, tissue, and organ function. This includes building new tissue and repairing damaged tissue. ATP can also be stored to fulfill future energy demands. The remaining 60 percent of the energy released from catabolic reactions is given off as heat, which tissues and body fluids absorb.

Catabolic reactions give out energy. They are exergonic. In a catabolic reaction large molecules are broken down into smaller ones.

answer: a. Exergonic and catabolic