Microbiology Growth Media Types Quiz

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What is the main purpose of a chemostat in maintaining bacterial population growth?

To adjust the dilution rate for nutrient entry and waste exit (correct)

To create an overflow of excess bacteria

To allow constant removal of bacteria and medium

To promote the exponential growth of bacteria

In the Petroff-Hausser Counting Chamber Method, what does CFU/mL stand for?

Colony-Forming Units per Milliliter (correct)

Colony-Found Units per Milliliter

Culture Forming Units per Microliter

Calculated Filtration Units per Millimeter

What is the main advantage of the Dilution Method for counting bacterial colonies?

It allows for easy differentiation between Gram-positive and Gram-negative bacteria

It allows direct observation of bacterial morphology

It ensures precise counting of all bacterial colonies

It provides a trend indicating colony concentration (correct)

Which method is primarily used to obtain pure cultures of bacteria?

Selective medium technique Signup and view all the answers

What is the purpose of an enriched medium in bacterial culture?

To provide specific nutrients for fastidious bacteria Signup and view all the answers

What does the exponential growth curve in bacteria indicate?

Multiplicative increase in population with time Signup and view all the answers

What is the main purpose of a selective medium in bacterial culture?

Allows only the growth of a specific bacterial species Signup and view all the answers

Which type of medium allows the growth of distinct bacterial species that can be identified based on their differential growth patterns?

Selective medium Signup and view all the answers

How is a pure culture typically obtained?

By obtaining colonies of similar morphology, shape, and size Signup and view all the answers

What is the main characteristic of an enriched medium?

It is prepared by addition of complex, nutritious bases Signup and view all the answers

In binary fission, what does a viable bacterium divide into?

Two daughter clones Signup and view all the answers

If E.coli has a generation time of 20 minutes, how many bacteria will be present after 1 hour starting with one bacterium?

$16$ bacteria Signup and view all the answers

Which type of medium contains known amounts of nutrients and is used when nutritional requirements of the microorganism are unknown?

Defined medium Signup and view all the answers

In microbiology, which type of medium allows for the isolation of specific types of bacteria while inhibiting the growth of others?

Selective medium Signup and view all the answers

What is the term used to describe a culture that contains only one species or strain of microorganism?

Pure culture Signup and view all the answers

Which type of medium contains additional nutrients to support the growth of fastidious microorganisms?

Enriched medium Signup and view all the answers

During exponential growth in bacteria, what is increasing exponentially?

Population size Signup and view all the answers

Which type of medium distinguishes between different microorganisms based on their biochemical characteristics?

Differential medium Signup and view all the answers