10)Which of the following statements about anaerobic respiration is FALSE? A)It yields lower amounts of ATP when compared to aerobic respiration. B)The complete Kreb's cycle is utilized. C)It involves the reduction of pyruvate to lactic acid or ethanoi. D)It requires cytochromes.
11)A strictly fermentative bacterium produces ATP A)by glycolysis only. B)by aerobic respiration only. C)by fermentation or aerobic respiration. D)only in the absence of oxygen. E)only in the presence of oxygen.
12)Which compound(s) is/are the 12 reduced form(s) in the reaction shown in the figure at left? Alisocitric acid and a- ketoglutaric acid B)a-ketoglutaric acid and NAD C)NAD D)NADH E)NADH and isocitric acid с B A 0 10 5 Time (hr)
13)The figure at left hows a typical 13 bacterial growth curve with the y-axis indicating the log of the number of bacteria and the x-axis indicating time in culture. In the figure, which section shows a growth phase where the number of cells dying equals the number of cells uiviuin5.
14)Which enzyme catalyzes the reaction: 0 2. +0, +2H + H20, +0,? A)catalase B)oxidase C)peroxidase D)superoxide dismutase 14
15)A culture medium on which only gram-positive organisms grow and a yellow halo surrounds Staphylococcus aureus colonies is called a(n) A)selective medium. B)differential medium. C)enrichment medium. D)selective and differential medium. E)differential and enrichment medium. 15
16)Which of the following is the best method to sterilize heat-labile solutions? A)dry heat B)autoclave C)membrane filtration D)pasteurization E)freezing 16
17)Which of the following would be best used to sterilize plastic Petri plates in a plastic wrapper? A)Autoclave a B)Gamma radiation C) Quats D)Freezing E)Ultraviolet radiation 17 Disinfectant Zone of inhibition (mm) A 10 B 2.5 C 0 D 5