13-Which tube might indicate the presence of Helicobacter pylori 14-True or Fals
ID: 302386 • Letter: 1
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13-Which tube might indicate the presence of Helicobacter pylori 14-True or False A disinfectant should beused after a spilil, before the start of ar labperiod and after alt work is completed 15- True or False In exercise #19 Fluid Thioglycollate medium is a rich medium used to support the growth of both aerobic and anaerobic bacteria. 16- True or False A defined medium consists of organic compounds and inorganic ions whose is not known. composition 17- True or False The purpose of the gas generator envelope in the gas pak anaerobic jar system is to generate hydrogen gas and methane gas. The hydrogen gas reacts with oxygen to create an anaerobic condition. 18-True or False Chemolitotrophs are organisms that can oxidize inorganic ions such as Iron and Nitrates and obtain energy from them.Explanation / Answer
14. True. Within the time of your lab experiment you can't use disinfectant. And you should clean the lab equipments before and after lab work.
15. True. Used to support the growth of both aerobic and anaerobic bacteria.
16. False. The composition of defined medium are known.
17. True. This method is used to produce anaerobic condition.
18. True.
8. Simmons citrate agar is use for differentiation of enterobacteriaceae based on their utilization of citrate as carbon source. When bacteria metabolizes citrate, the ammonium salt (nitrogen source) are broken down to ammonia and this pH shift change the indicator bromomethyl blue from green to blue. Ans. D) citrate.
9. Bacteria which use mixed acid fermentation pathway produces high levels of organic acids that turns the methyl red in red colour during methyl red (MR) test. Ans. B) Methyl red.
10. True.
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