What is the optimum temperature and pH for nitrifying bacteria ?

Related Mcqs:

1. Optimum temperature, minimum temperature and maximum temperature are collectively called_________________?

   A. Absolute temperature
   B. Cardinal temperature
   C. Various temperature
   D. All the above

2. The optimum temperature for warm season crop is ___________________?

   A. 25-35°C
   B. 18-24°C
   C. 20-25°C
   D. 10-20°C

3. Which type of bacteria grow best within the temperature range 55°C_____________________?

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

4. Which type of bacteria grow best at refrigeration temperature 10°C_______________________?

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

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

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

6. Optimum humidity in hatching room must be ____________________?

   A. 65%
   B. 75%
   C. 80%
   D. 90%

7. During storing food grains, what is the optimum level of moisture?

   A. < 2%
   B. < 5%
   C.  < 12 %
   D. No moisture level required

   Submitted by: Shafiq Rehman

8. Which bacteria convert nitrite to nitrate___________________?

   A. Frankia
   B. Nitrobacter
   C. Pseudomonas
   D. None of the above

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

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

10. The virus infecting bacteria is called:_________?

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

    Submitted by: Shafiq Rehman