Question

this are very difficult questions for my environmental biology class. These are examples from the practice homework so can anyone please help me check my answers.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the questi 40) The cycle, found only in plants, bacteria, protists, and fungi, centers on the conversion of acetyl-CoA to succinate for biosynthesis, occuring as an alternative pathway to the _cycle A) Glyoxylate; Citric Acid B) Metabolic; Citric Acid C) Citric Acid; Glyoxylate D) Metabolic; Glyoxylate 41) In lab, you add a few drops of hydrogen peroxide (H2O2) to microbial colonies on an agar plate. The H2O2 is instantly neutralized to O2 and H2O. What is the best conclusion? A) Oxygen is not toxic to this bacterium. B) This bacterium can produce catalase and/or peroxidase. C) This bacterium can either use oxygen or survive in the presence of oxygen. D) All of the above 42) Which of the following requires a higher decimal reduction time (D) and higher radiation killing dose when it comes to microbial control? A) Archaea B) Prokaryotes C) Endospore-forming species D) All of the above 43) In respiration, bacteria need the Electron Transport System (ETS) to synthesize ATP. While bacteria use oxygen as the terminal electron acceptor, other substrates such as sulfate and nitratas the electron acceptor. - bacteria use A) anaerobic; aerobic B) aerobic; anaerobic C) some aerobic; other aerobic D) some anaerobic; other anaerobic 44) Wher in the

Answer 1

Ans) the glyoxylate cycle ; citric acid

41. All of the above.

The bacteria that can produce catalase or peroxidase are strict aerobs and facultative anaerobs so they utilise ocugen and also can survive in absence of oxygen m these enzymes protect the bacteria from harmful metabolites of oxygen.

42. Endospore forming species.

Prokaryotes would include all bacteria.

43. Aerobic bacteria use oxygen as terminal electron acceptor, anaerobic bacteria use sulfates and nitrates and terminal electron acceptor.

44. All of the above.

45. All of the above.