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Final LC Questions And Answers 2024/2025
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Final LC Questions And Answers 2024/2025
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Final LC Questions And AnswersThe ability of microbes to ferment different compounds is used to produce a variety of foods.
Which of the following are possible products of fermentation? - ANSLactic acid, acetic acid,
carbon dioxide, and ethanol
You are working for a chemical company and are responsible for growing yeast culture that
produces ethanol. The yeasts are growing well on maltose medium but are not producing
alcohol. What is the most likely explanation? - ANSO2 is in the medium
NOTE: Fermentation doesn't require oxygen, the keeps cycle, or an ETC.
Where does the energy for carbon fixation come from? - ANSSunlight
NOTE: photoautotrophs energy source is light and the carbon source is CO2.
During respiration, where is CO2 produced? - ANSKreb's cycle and linking reaction
NOTE: 2 CO2 from pyrrhic acid and 4CO2 from Kreb's.
Why is nitrogen often a limiting plant nutrient, despite the fact that nearly 80% of the
atmosphere is nitrogen gas? - ANSPlants can't fix N2
Name the process that uses nitrate as an electron acceptor. - ANSanaerobic respiration
NOTE: aerobic respiration uses oxygen as the final electron acceptor instead of nitrate.
What type of organisms are green and purple sulfur bacteria? - ANSPhotoautotrophs
What is the name of the protein produced by Shigella that induces the rearrangement of the
host cytoskeleton, allowing the bacteria to enter the host cells? - ANSInvasins
Thorough cooking or reheating of food will prevent all of the following EXCEPT... -
ANSStaphylococcal food poisoning
Bacillus cereus gastroenteritis
Some of the individuals who said they ate the bbq sauce did not become ill. Which one of the
following is the most likely explanation for such an occurrence? - ANSIndividuals who became ill
may have consumed larger quantities than individuals who did not become ill.
Which of the following symptoms is LEAST characteristic of Clostridium perfringes food
poisoning? - ANSModerate vomiting and fever
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