Which bacteria convert nitrite to nitrate___________________?

Related Mcqs:

1. Biochemical reduction of nitrate to nitrite or gaseous nitrogen is called ________________________?

   A. Reduction
   B. Oxidation
   C. Denitrification
   D. None of the above

2. In dairy industry, the most often used bacteria to convert milk sugar to lactic acid are___________________?

   A. Streptococcus
   B. Lactobacillus
   C. Acetobacter
   D. Both a & b

3. The process that convert glucose to pyruvic acid is____________________?

   A. Citric cycle
   B. Glycolysis
   C. Fermentation
   D. Calvin-Benson cycle

4. Which bacteria causes fermentation__________________?

   A. Azotobacter
   B. Bacillus
   C. Pseudomonas
   D. Corey

5. In flood rice, snail feed on bacteria called__________________?

   A. Helix
   B. Limnea
   C. Azolla
   D. None of the above

6. The virus infecting bacteria is called:_________?

   A. Bacteroid
   B. Bacteriophage
   C. Bacterin
   D. All of these

   Submitted by: Shafiq Rehman

7. What is the optimum temperature and pH for nitrifying bacteria ?

   A. 30-35 c, pH 5.5
   B. >35 c, pH less than 5
   C. 25-40 c, pH 8-8.5
   D. All of thses

   Submitted by: Shafiq Rehman

8. Bacteria, single celled animals and plants are grouped to gather as_______________________?

   A. Protozoa
   B. Prototypal
   C. Protista
   D. Prokaryotes

9. Which type of bacteria grow best at room temperature of 20____________________?

   A. Mesophilic
   B. Thermophilic
   C. Psychrophilic
   D. All the above

10. The acetic acid producing bacteria are___________________?

    A. Acetomonas
    B. Saccharomyces
    C. Streptococeus
    D. None of the above