6. General Microorganism Indicators

Try these first

1. 1.

   What does CPCB stand for?

   Hint

   Think of the organization responsible for pollution standards.

2. 2.

   Name one method used to count microorganisms in water.

   Hint

   This method involves growing bacteria on a nutrient medium.

3. 3.

   What does cfus stand for?

   • Colony Forming Units
   • Counted Form Units
   • Common Form Units

   Hint

   Think about what kind of unit is used in microbiology related to culturing.

4. 4.

   Is turbidity a reliable measure of microbial presence?

   • True
   • False

   Hint

   Remember the distinction between things that are visible and those that are living.

5. 5.

   A water source shows high turbidity levels. Discuss the potential steps you would take to confirm the presence of viable microorganisms.

   Hint

   Consider both immediate assessments and assays.

6. 6.

   If a water sample contains a known concentration of 100 CFUs per ml but you dilute it 10x, what concentration is left after plating if observed colonies number 5?

   Hint

   Think of how dilution affects concentration.