Question

MacConkey Agar contains crystal violet which binds to gram positive bacteria, preventing them from growing. The media turns yellow in response to the production of acid when lactose is fermented. Which two terms best describe this media

Answer 1

The media describes Selective and Differential.

Step-by-step explanation:

Given - MacConkey Agar contains crystal violet which binds to gram positive bacteria, preventing them from growing. The media turns yellow in response to the production of acid when lactose is fermented.

To find - Which two terms best describe this media ?

Proof -

The media describes Selective and Differential.

Reason -

MacConkey is a selective and differential media.

This media is used to selectively isolate gram-negative bacteria from other bacteria and differentiate them on the basis of lactose fermentation.

Lactose fermenters turn red or pink on MacConkey agar, and non-fermenters do not change color.