Question

116. Energy obtained from REDOX reactions with nitrate (NO3) and glucose is____________ carbon dioxide (CO2) and molecular hydrogen (H2)

     a. more than b. less than c. equal to d. there is not information to answer

Your family and friends ask you, “Is E. coli a pathogen?” What would you answer? which of the following sentences is not correct

1. Some E. coli grow normally in the d. human intestine, producing vitamins,
   such as vitamin K

2. Other strains, such as E. coli O157:H7, e. cause serious illness.

3. E. coli is a common microorganism there is nothing to be worried about

4. E. coli, like other microbes can live symbiotically in our gut

5. Location, location, location. If it stays where it should be no strain of E. coli is a threat (please, explain this question)

Answer 1

Energy obtained from REDOX reactions with nitrate (NO3) and glucose is more than carbon dioxide (CO2) and molecular hydrogen (H2).

Redox reaction is an oxidation-reduction reaction in which one or more electrons are transferred from one reactant to another. Redox reaction of glucose during cellular respiration produces energy while reduction of CO2 into sugar needs energy.

E.coli is an opportunistic pathogen. They are ubiquitously present in our intestine. Usually they are harmless and important part of human microbiota. Some of the E. coli strains can cause diseases like diarrhea, urinary tract infections if they are outside of the intestine. So they are called as opportunistic pathogens.

E. coli have a mutualism with human,means both organisms are benefited. E. coli helps is vitamin K production and absorption.

E. coli 0157:H7 produces shiga toxin which causes foodborne illness like bloody diarrhea.

E.coli is a common microorganism there is nothing to be worried about - this statement is incorrect. Because it can cause severe illness outside the intestine.