17) Which of the following is an example ol pu A) water rushing over Niagara Fal

Question

17) Which of the following is an example ol pu A) water rushing over Niagara Falls B) light flashes emitted by a firefly C) a molecule of glucose D) a crawling beetle foraging for food 18) Which term most precisely describes the cellular process of breaking down large molecules into smaller ones? A) catabolism (catabolic pathways B) metabolism C) anabolism (anabolic pathways) D) dehydration 19) A chemical reaction that has a positive G is best described as A) endergonic B) enthalpic C) spontaneous D) exergonic ant malecule in metabolism? ct

Explanation / Answer

18. A. Catabolism

A catabolic process is one, in which large, complex molecules are broken down/ converted into smaller ones. Example: Glycolysis ( a 6 carbon sugar, glucose is converted into a simpler 3 carbon compound, pyruvic acid). Conversely, a process like photosynthesis is an anabolic process, where macromolecules such as sugars are formed from simpler molecules such as CO2  and water.

19. A. endergonic

A chemical reaction with a positive G is best described as endergonic because it requires an input of energy and is not spontaneous. These kind of reactions are reactant-favoured.

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