Part A MacConkey Agar Select each of the statements below that are true of MacCo
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Question
Part A MacConkey Agar Select each of the statements below that are true of MacConkey agar. (Also known as MAC) Staph. aurous and Staph. epidormidis grow well on MAC. There is lactose in MAC agar E.colí will form pink-purple colonies on MAC. The pH indicator in MAC is phenol red Crystal violet and bile salts in MAC will inhibit the growth of gram negative bacteria. MAC is a differential medium. Organisms that ferment lactose willorm colorless colonies 0 on MAC MAC selects FOR gram negative bacteria. (enables them to grow) MAC is a selective medium. Submit Request AnswerExplanation / Answer
Ans:
Statements that are true of MacConkey agar.(Also known as MAC):
- There is lactose in MAC agar.
- E. coli will form pink-purple colonies on MAC.
- MAC is a differential medium.
- MAC selects FOR gram negative bacteria. (enables them to grow)
- MAC is a selective medium.
Explanation:
- MacConkeys agar is a selective and differential medium.
- It contain crystal violet, bile salt, lactose, neutral red as pH indicator.
- It is designed to isolate and differentiate enterics based on their ability to ferment lactose.
- Organisms that ferment lactose will appear pink.
- Non lactose fermenters will produce colourless colonies.