QUIZ 1. What statement is true? a. Anabolism is molecular breakdown, which is endergonic. b. Catabolism is molecular breakdown, which is exergonic. c. Anabolism is molecular buildup, which is exergonic. d. Catabolism is molecular buildup, which is endergonic. Answer: b. Catabolism is the breakdown of molecules, which releases heat and energy so these are exergonic reactions. Anabolism is the making or buildup of molecules, which requires energy so these are endergonic reactions. 2. Organisms that get their energy from inorganic molecules are called what? a. Phototrophs b. Heterotrophs c. Autotrophs d. Lithotrophs Answer: d. Lithotrophs are organisms that get their energy from inorganic molecules, such as reduced iron and hydrogen sulfide. 3. What is the main energy currency used in most energy-requiring reactions in the cell? a. ATP b. NAD+ c. NADP+ d. FAD Answer: a. Each of these reactions are helpful in energy needs of the cell, except that ATP is the main energy source in most metabolic processes in the cell.
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