BMEN 1208 physiologyexam1_questins & answers

1) The ________ of glycogen from many glucose molecules is an ________ reaction. A) decomposition, endergonic B) synthesis, exergonic C) decomposition, exergonic D) synthesis, endergonic 2) Activation energy is A) the energy lost or gained in a reaction. B) the energy required for an endergonic reaction. C) the energy required to bring molecules into a position where they can interact. D) required to convert an endergonic reaction to an exergonic reaction. 3) A reversible reaction is one where A) there are large changes in the net free energy from substrate to product. B) there are small changes in the net free energy from substrate to product. C) there is no change in the net free energy from substrate to product. D) a reaction between products is unlikely due to the high activation energy. 4) Isozymes A) are enzymes with a slightly different structure that catalyze the same reaction. B) are enzymes with the same structure that catalyze different reactions. C) are inorganic molecules that bind to and thereby activate enzymes. D) are the inactive form of an enzyme. 5) Typically, when steroid hormones bind to their receptors, A) adenylyl cyclase is activated. B) cyclic nucleotides are formed. C) G proteins are inhibited. D) gene transcription may increase or decrease. E) protein kinases are activated. 6) Steroid hormones are synthesized in the ________ of the cell. A) rough endoplasmic reticulum B) smooth endoplasmic reticulum