Bacteria Culture Media

What is the difference between nutrient agar and lactose broth?

• Nutrient agar is solid and lactose broth is liquid

• Both are liquid but lactose broth has added lactose sugar

• Nutrient agar is a selective media and lactose broth is a derived media

• there is no difference between the two types

What is the bet pH for most bacterial growth?

• 2

• 4

• 7

• 11

If you want to select for a specific type of bacteria, what type of media would you use?

• Nutrient broth

• Differential media

• Selective media

• an autoclave

Nutrient broth is turned into nutrient agar by the addition of what?

• lactose

• eggs

• agar

• peptone

Peptone provides this nutritional need for bacteria.

• water

• oxygen

• protein

• iron

The type of culture media that can turn bacteria different colors on a petri dish is called a ____ media

• selective

• differential

• natural

• broth

All of these are derived media except

• blood

• nutrient agar

• lactose broth

• brilliant green bile broth

Regardless of the media type, the best temperature for most bacteria is

• 10 -15^o C

• 25 - 40^oC

• 60^oC

• 100^oC

What is the difference between nutrient agar and nutrient broth.

• one is liquid and one is solid

• one is sterile and one is not sterile

• one is acidic and one is basic

• one has extra sugar and one does not

All of these options characterize natural media except

• Natural media is difficult to sterilize

• Natural media does have a long shelf life

• Natural media is more challenging to collect from its source

• Natural media comes in powder form and has to be put into solution