People who can digest lactose, a disaccharide, have enzymes, called lactase, to break the molecule
down into glucose and galactose, two monosaccharides. People who are lactose intolerant cannot
properly break down lactose because their body does not make enough lactase.
Which of the following describes the process of digesting lactose?
It is an anabolic process with an exergonic reaction that results in the release of energy.
It is a catabolic process with an exergonic reaction that results in the release of energy.
It is an anabolic process with an endergonic reaction that requires an input of energy.
It is a catabolic process with an exergonic reaction that requires an input of energy.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

the correct answer to this question is 2

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.