60. A _ _ is a membrane-enclosed bag of hydrolytic enzymes that the cell uses to digest macromolecules.
(A) lysosome
(B) ribosome
(C) macrosome
(D) hydrosome
(E) peroxisome

56. Which of the following statements about photosynthesis is not true? (A) Photosynthesis is a redox process in which water is oxidized and carbon dioxide is reduced. (B) There are two linked stages of photosynthesis: the light reaction and the Calvin cycle. (C) The light reaction occurs in stroma, and the Calvin cycle occurs in grana. (D) The Calvin cycle uses ATP for energy and NADPH for reducing power to form sugar from CO2. (E) The flow of electron during photosynthesis is H2O→NADPH→ Calvin cycle.

57. The Genetic Code is almost universal, that is, it is the same in all living systems. What is the exception? (A) fungi (B) virus (C) plants (D) prokaryotes (E) mitochondria

58. The direct energy source that drives ATP synthesis during oxidative phosphorylation is (A) the oxidation of glucose and other organic compounds. (B) the endergonic flow of electrons down the electron transport chain. (C) the affinity of oxygen for electrons. (D) a difference of H+ concentration on opposite sides of the inner mitochondrial membrane. (E) the transfer of phosphate from Krebs cycle intermediates to ATP.

59. Which of the following statements is a correct distinction between autotrophs and heterotrophs? (A) Only heterotrophs need to acquire chemical compounds from the environment. (B) Cellular respiration is unique to heterotrophs. (C) Only heterotrophs have mitochondria. (D) Autotrophs, but not heterotrophs, can nourish themselves beginning with nutrients that are entirely inorganic. (E) Only heterotrophs require oxygen.

61. Which of the following pieces of evidence most directly contradicted the hypothesis that viruses were some kind of cell? (A) Organisms could develop immunity to virus. (B) Viruses could pass through fine filters. (C) Viruses can form crystals. (D) Viruses contain proteins. (E) Viruses cause disease.

62. Nitrogen fixation involves the conversion of gaseous nitrogen to (A) ammonia. (B) nitrite. (C) nitrate. (D) amine. (E) amino acid.

63. Of the plant hormones, which one most directly stimulates cell division and delays senescence? (A) auxin (B) ethylene (C) cytokinin (D) gibberellin (E) abscisic acid

64. Eukaryotic promoters usually have a nucleotide sequence about 25 nucleotides upstream from the transcriptional start point. The nucleotide sequence is called (A) ATAT box. (B) TATA box. (C) promoter sequence. (D) TAATTAT sequence. (E) Shine-Dalgarno sequence.

65. What part of the brain affects the emotional aspects of behaviors？ (A) reticular activating system (B) limbic system (C) parasympathetic system (D) peripheral nervous system (E) cerebellum

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