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What are some advantages and disadvantages of the serial dilution agar plate technique?

the total count includes dead as well as living cells


What is the composition of modified nutrient glucose agar media?

Modified Nutrient Glucose Agar media typically contains a complex nutrient base, glucose as a carbon source, and a pH indicator such as bromocresol purple to detect acid production. It may also include peptones, mineral salts, and agar as a solidifying agent. Additional components can be added based on the specific requirements of the experiment or organism being cultured.


Why are some bacteria able to grow on count agar that contains milk even though they do not produce any proteases?

Some bacteria are able to utilize the nutrients in milk other than just proteins. For example, they can use lactose as a carbon source. Additionally, some bacteria may be able to break down the milk into simpler compounds through non-protease mechanisms to support their growth on count agar.


What is the function of hockey stick in spread plate method?

The hockey stick is used to spread the microbial inoculum evenly across the agar surface in a spread plate method. By dragging the hockey stick back and forth over the agar surface, it helps to distribute the microbes in a consistent and uniform manner, promoting even colony growth.


What is the name of the streak when you apply specimen to agar plate?

The process of applying a specimen to an agar plate to grow colonies is known as streaking. This technique involves using an inoculating loop to spread the specimen across the surface of the agar in a pattern that promotes the isolation of individual colonies for further study.

Related Questions

Where should a label written on an agar plate?

On the base of the agar plate.


Why Plate Count Agar is used?

Plate Count Agar is used to estimate the number of viable bacteria or fungi in a sample. It provides a suitable medium for the growth of a wide range of microorganisms, allowing them to form visible colonies that can be counted. This method is commonly used in food and environmental microbiology to assess the microbiological quality of samples.


What are the function of agar slopes?

function of agar slopes


How can one accurately count colonies on an agar plate?

To accurately count colonies on an agar plate, one should use a colony counter or a grid system to track and tally individual colonies. It is important to ensure the plate is properly labeled and incubated under the correct conditions to allow colonies to grow distinctively. Counting should be done systematically and consistently to avoid errors.


What are some advantages and disadvantages of the serial dilution agar plate technique?

the total count includes dead as well as living cells


Where should a label be written on an agar plate?

Labels should be written on the bottom of the agar plate. Write the label using a marker on the agar side, being careful not to write on the lid or cover of the plate. This ensures that the label remains visible and does not interfere with the growth of microorganisms on the agar surface.


Why direct microscopy and plate count give not a same counts?

Direct microscopy counts viable and non-viable cells, whereas plate count only counts viable cells that are able to grow and form colonies on agar plates. Additionally, plate count may underestimate the total number of viable cells due to factors like the inability of certain cell types to grow under specific conditions or the formation of aggregated cells that do not separate easily on the agar plate.


Is glucose salts agar selective?

Glucose Salts Agar (GSA) is a selective agar that selects for gram-negative bacteria only. This means that no gram-positive bacteria will be able to grow on it.


What would be found in the clear area that would not be found in the blue area of starc agar plate after the addition of iodine?

In the clear area that would not be found in the blue area of starch agar plate after the addition of iodine is glucose and exoenzymes. Exoenzymes mainly hydraulic enzymes that leave the cell and breakdown.


What does it mean to inoculate an agar plate?

Inoculating an agar plate refers to transferring microorganisms onto the surface of the agar using a sterile inoculating loop. This allows the microorganisms to grow and form visible colonies that can be studied or identified.


What is the composition of modified nutrient glucose agar media?

Modified Nutrient Glucose Agar media typically contains a complex nutrient base, glucose as a carbon source, and a pH indicator such as bromocresol purple to detect acid production. It may also include peptones, mineral salts, and agar as a solidifying agent. Additional components can be added based on the specific requirements of the experiment or organism being cultured.


What would be possible consequence of replacing the lactose with glucose on the MacConkey Agar?

When lactose is replaced with another type of sugar like glucose in the MacConkey Agar, it is usually to identify bacteria mutations. The method to detect the fermentation in a replacement sugar solution is the same as lactose fermented solution.