84. Histones contain large amounts of which of the following amino acids?
(A) leucine
(B) lysine
(C) glutamic acid
(D) histidine
(E) tryptophan

85. Release of succinate from succinyl-CoA can be coupled to GTP synthesis because: (A) Coenzyme A is a "high energy" compound, just like GTP. (B) The link between succinate and CoA involves an acid anhydride to phosphate. (C) The thioester bond between succinate and CoA has a large -AG of hydrolysis. (D) The amide bond between succinate and CoA has a large -AG of hydrolysis. (E) None of the above.

複選題86. Gout is caused by high levels of uric acid. What are the possible causes? (A) G-6-phosphatase deficiency (B) PRPP mutation (C) HGPRT deficiency (D) all of the above (E) none of the above

87. The final reduced species in the electron transport chain is _____.(A) O2 (B) H2O (C) coenzyme Q (D) cytochrome c (E) none of the above

88. Which of the following statements concerning ẞ-oxidation of fatty acids is false? (A) Initiation occurs at the methyl end of the fatty acid. (B) ẞ-oxidation is the primary route for degradation of fatty acids. (C) B-oxidation takes place in the mitochondrial matrix. (D) Two-carbon units are successively eliminated with each round. (E) None of the above.

89. Many antibiotics, especially for viruses and cancer therapy involve inhibition of folic acid reactions, especially because folic acid is essential for _____ (A) synthesis of many amino acids (B) conversion of uracil to thymine for DNA synthesis (C) synthesis of deoxyribose for DNA synthesis (D) All of these reactions above are reasons why inhibitors of folic acid act as antibiotics. (E) None of these reactions explains the reason why inhibitors of folic acid act as antibiotics.

90. Individuals with diets high in coconut oil consume large amounts of lauric (12:0). What are the ẞ-oxidation products of lauric acid? (A) 6 acetyl-CoA, 6 NADH, 6 FADH2 (B) 6 acetyl-CoA, 6 NADH, 5 FADH2 (C) 6 acetyl-CoA, 5 NADH, 5 FADH2 (D) 6 acetyl-CoA, 5 NADH, 6 FADH2 (E) none of the above

1. Atmospheric pressure decreases with altitude, but not in a linear manner. It decreases according to the following formula: P = , where the constant k is given by , P0 is the atmospheric pressure at sea level, and y is the height above sea level. At what height above sea level will the atmospheric pressure be reduced to half? [ln2 = 0.69314] (A) 5545 m (B) 3447 m (C) 5034 m (D) 4790 m (E) 2996 m

2. There are two tuning forks with frequencies 255 Hz and 251 Hz. When both tuning forks start vibrating, what frequency will be heard by the ear? How many times per second can a loud sound be heard? (A) 251 Hz, 2 times each second (B) 255 Hz, 4 times each second (C) 254 Hz, 3 times each second (D) 253 Hz, 4 times each second (E) 252 Hz, 2 times each second

3. The method to correct hyperopia is to wear a convex lens with an appropriate focal length. Suppose a hyperopic person, at the maximum accommodation of the eye's lens (with the minimum curvature radius), can clearly see objects at a distance of 1.5 meters. What should be the focal length of the convex lens required for them to clearly see an object at a distance of 15 cm?(A) 14.0 cm(B) 13.5 cm(C) 22.0 cm(D) 15.0 cm(E) 16.6 cm

4. In an adiabatic compression of an ideal gas, which of the following statements is NOT true? (A) The gas does work on its surroundings. (B) The internal energy of the gas increases. (C) The temperature of the gas increases. (D) The gas absorbs heat from its surroundings. (E) The process results in a change in the state of the gas.

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