10 Questions
What is the characteristic of a chemically defined medium?
Exact amount of pure chemicals is known
Which type of media inhibits the growth of some bacteria while selecting for the growth of others?
Selective media
What is the primary difference between general purpose media and selective media?
Selective media inhibits the growth of some bacteria while selecting for the growth of others
Which type of media provides the minimal and basic growth requirements for bacteria but not all microbes can grow on it?
Chemically defined medium
What is the composition of a complex medium?
It contains a mixture of proteins and extracts
What makes Mannitol Salt Agar a selective medium?
It selects for salt tolerant bacteria
What is the role of phenol red in Mannitol Salt Agar?
It serves as a pH indicator
Why is MacConkey Agar considered a selective medium?
It contains bile salts and crystal violet that inhibit the growth of Gram-positive bacteria
What is the function of neutral red in MacConkey Agar?
It acts as a pH indicator
What is the differential ingredient in MacConkey Agar?
Lactose sugar
Test your knowledge of media composition in microbiology with this quiz. Learn about the differences between chemically defined and complex media and how they support the growth of microorganisms.
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