MCQs Test on Growth of Bacteria.

MCQs Test on Growth of Bacteria

Quiz

 

1. The bacterial growth phase showing vigorous metabolic activity but no cell divisions and is characterized by increase cell size is __
   1.   Log Phase
   2.   Death Phase
   3.   Stationary Phase
   4.   Lag Phase
2. The bacterial growth phase showing vigorous cell divisions and is characterized by smaller cell size is __
   
   1.   Log Phase
   2.   Death Phase
   3.   Stationary Phase
   4.   Lag Phase
3. The bacterial growth phase showing no growth in cell divisions, cells become metabolically inactive and is characterized by formation of endospores is
   1.   Log Phase
   2.   Death Phase
   3.   Stationary Phase
   4.   Lag Phase
4. The bacterial growth phase showing increased death rate and no new cell divisions is
   
   1.   Log Phase
   2.   Death Phase
   3.   Stationary Phase
   4.   Lag Phase
5. In death phase there is remarkable decrease in
   
   1.   Viable Bacteria
   2.   Dividing Bacteria
   3.   Dormant Bacteria
   4.   None of the above
6. In stationary phase there is remarkable decrease in
   1.   Viable Bacteria
   2.   Dividing Bacteria
   3.   Dormant Bacteria
   4.   All of the above
7. Which of the following is used to grow bacterial culture continuously?
   
   1.   Chemostat
   2.   Hemostat
   3.   Coulter-Counter
   4.   Turbidostat
8. The average size of the cells in the exponential phase is ___________
   
   1.   larger than the initial size
   2.   smaller than the initial size
   3.   equal to the initial size
   4.   maybe smaller or larger than the initial size
9. Lag phase is also known as ___________
   
   1.   period of initial adjustment
   2.   transitional period
   3.   generation time
   4.   period of rapid growth
10. The generation time for E.coli is _______
    1.   20 minutes
    2.   35 minutes
    3.   2 minutes
    4.   13 minutes
11. The generation time for M. tuberculosis is _______
    1.   24 hours
    2.   35 minutes
    3.   20 minutes
    4.   36 hours
12. Bacteria are more sensitive to antibiotics in which stage of bacterial growth phase,
    
    1.   Exponential Phase
    2.   Death Phase
    3.   Stationary Phase
    4.   Lag Phase
13. Most effective way for determination of viable count in a culture media is,
    1.   Coulter Counter
    2.   Colony Count
    3.   Spectrophotometry.
    4.   Chemostat
14. Which is indirect method for determination of cell mass___
    1.   Turbidimetric Method
    2.   Determination of cell nitrogen
    3.   Coulter counter.
    4.   Colony count.
15. Which of the following is not a "Direct Count Method".
    1.   Proportional Count
    2.   Breed Method
    3.   Membrane Filter Count
    4.   Counting Chamber Method