Bio 101 REAL Exam 2 QUESTIONS WITH VERIFIED ANSWER |ALREADY PASSED

Bio 101 REAL Exam 2 QUESTIONS WITH VERIFIED ANSWER |ALREADY PASSED ATP hydrolysis is a. endergonic. b. exergonic. c. chemoautotrophic. d. None of the above - ANSWER exergonic. Enzymes are biological catalysts and function by a. increasing free energy in a system. b. lowering activation energy of a reaction. c. lowering entropy in a system. d. increasing temperature near a reaction. - ANSWER lowering activation energy of a reaction. Which of the following contribute to the specificity of enzymes? a. Each enzyme has a narrow range of temperature and pH optima. b. Each enzyme has a specific active site that interacts with a particular substrate. c. Substrates themselves may alter the active site slightly for optimum catalysis. d. Enzymes are more active at higher temperatures e. All of the above - ANSWER Enzymes are more active at higher temperatures Coenzymes and cofactors, as well as prosthetic groups, assist enzyme function by a. stabilizing three dimensional shape and maintaining active sites. b. assisting with the binding of enzyme and substrate. c. Maintaining active sites in an active configuration. d. Reversibly binding to the enzyme to regulate the enzyme's activity e. a, b, and c only - ANSWER Stabilizing three dimensional shape and maintaining active sites. Assisting with the binding of enzyme and substrate. Maintaining active sites in an active configuration. Which of the following are characteristics of enzymes? a. They are consumed by the enzymemediated reaction. b. They are not altered by the enzymemediated reaction. c. They raise activation energy. d. All of the above - ANSWER They are not altered by the enzyme mediated reaction. Ascorbic acid, found in citrus fruits, acts as an inhibitor to catecholase, the enzyme responsible for the browning reaction in fruits such as apples, peaches, and pears. One possibility for its function could be that ascorbic acid is very similar in size and shape to catechol, the substrate of the browning reaction. If this is true, then this inhibition is most likely an example of _______ inhibition. a. competitive b. indirect c. noncompetitive d. None of the above - ANSWER competitive Which statement about membrane phospholipids is not true? A. They associate to form bilayers. B. They have hydrophobic tails. C. They have hydrophilic heads. D. They give the membrane fluidity. E. They Flip flop readily to one side of the membrane to another. - ANSWER They Flip flop readily to one side of the membrane to another.