Serial Dilutions & Spread Method C34

The followings are objectives of serial dilutions EXCEPT.

• To make viable colony counts.

• To produce colony forming units.

• To dilute the bacterial population.

• To identify species of bacteria.

Which of the followings is the optimum number of colonies to make viable bacterial count?

• 10-100 colonies

• 20-200 colonies

• 20-400 colonies

• 10-300 colonies

According to the practical lecture video, what is the volume pipeted from the micropipette onto the agar plate?

• 1000 microlitre

• 0.01 mililitre

• 100 microlitre

• 0.11 mililitre

A single colony composed of millions of genetically identical bacteria that produced from a single bacterium.

• TRUE

• FALSE

According to the lecture video, which sample is used in the experiment

• Soil

• Contaminated water

• E coli

• Germs

What is CFU?

Define serial dilutions in microbiology.