Question

1) A decrease in entropy is associated with which type of reaction? A) dehydration B) catabolic C) depolymerization D) hydrolysis 2) Which of the following statements is an important consequence of the first law of thermodynamics for a living organism? A) The energy content of an organism is constant. B) An organism ultimately must obtain all of the necessary energy for life from its environment. C) The entropy of an organism decreases with time as the organism grows in complexity. D) Organisms grow by converting energy into organic matter. 3) When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated? A) It is used to power yet more cellular work. B) It is used to store energy as more ATP. C) It is used to generate ADP from nucleotide precursors. D) It is lost to the environment. 4) Which of the following statements is a logical consequence of the second law of thermodynamics? A) If the entropy of a system increases, there must be a corresponding decrease in the entropy of the universe. B) If the entropy of a system decreases, there must be a corresponding decrease in the entropy of the universe. C) If there is an increase in the energy of a system, there must be a corresponding decrease in the energy of the rest of the universe. D) If the entropy of a system decreases, there must be a corresponding increase in the entropy of the universe. 5) Which of the following is an example of cooperativity? A) the binding of an end product of a metabolic pathway to the first enzyme that acts in the pathway B) one enzyme in a metabolic pathway passing its product to act as a substrate for the next enzyme in the pathway C) a molecule binding at one unit of a tetramer, allowing faster binding at each of the other three D) binding of an ATP molecule along with one of the substrate molecules in an active site b) During an experiment, you discover that an enzyme-catalyzed reaction has a AG of -20 kcal/mol. f you double the amount of enzyme in the reaction, what will be the AG for the new reaction? 1)-40 kcal/mol 3)-20 kcal/mol -10 kcal/mol +20 kcal/mol

Answer 1

QUESTION 1

In this context, when am molecule undergoes a dehydration reaction, a water molecule or a hydrogen are removed. This will decrease the molecular movement and the randomness of the whole molecule. When we decrease the randomness of a system, the entropy is also reduced. So, the correct answer is dehydration

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