Chapter 6.2 - Microbial Nutrition (BIS3063)

A medium that contains an unknown chemical composition is _____ medium.

• defined

• complex

The above medium used to culture E. coli is classified as a _____ medium.

• defined

• complex

A medium that supports both Gram-positive and Gram-negative bacterial growth is ______ medium.

• defined

• selective

• enriched

• general purpose

Blood agar is NOT classified as a _____ medium.

• defined

• complex

• enriched

• differential

MacConkey is a selective medium because it:

• selects for Gram-positive bacteria

• inhibits the growth of Gram-positive bacteria

• distinguishes among non/lactose fermenters

• selects based on hemolytic activity

Which of the following is FALSE regarding a pure culture?

• Produces one type of colony morphology

• Consists of only a single species

• Produces various color of bacterial colonies

Which condition is NOT suitable for long-term storage of microbial culture?

• 4ºC on agar slant

• 37ºC on agar slant

• -20ºC in glycerol

• -80ºC in glycerol