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1) The bottom of the plate contains the agar and your experiment, if the lid gets lost but the bottom is labled you haven't lost any work. If you label the lid and the lid gets lost you won't be able to identify your experiment. You would have to start from the beginning, making plates, sterilizing plates, doing the experiment; perhaps not an option if it were a clinical sample.

2) The plates are placed in the incubator with their bottom half upper most. This is done to prevent droplets of moisture falling from the lid and smearing the culture. As the bottom is upper most when you are looking in the incubator it makes sense to label the bit you can see most easily.

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βˆ™ 14y ago
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βˆ™ 5mo ago

The bottoms of petri plates are labeled to avoid confusion or mix-ups when handling multiple plates. Since the plates are stacked with the bottom facing up, labeling the bottom ensures that the identification remains visible and consistent, even when the plates are stacked.

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βˆ™ 13y ago

Petri Dishes are marked on the bottom so that there is no confusion as to the sample number.

Specially when working with patients samples you do not want to mix them up.

As from a quality control point of view petri dishes are marked on the bottom because you can switch the lids.

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βˆ™ 12y ago

to make the plate identifiable and the Petri plate would constantly be placed with the label faced upward.

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βˆ™ 16y ago

So nothing blocks the view.

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Q: Why are the bottoms of petri plates labeled rather than the lid?
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Why should a petri plate be discarded if media is splashed up the side to the top?

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Related questions

Can condensation in petri plates be wiped with a towel?

No. It will contaminate the plates.


Why are petri plates inverted for incubation?

it is to prevent the moisture formed due to condensation of the agar ,to mix with the components present in the petri plates, else causes contamination


What is used to sterilize plastic petri plates in plastic wrapper?

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How should petri dishes be labeled?

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Why are inverted plates during incubation?

Because during incubation moisture will form at the top of the petri dish. Inverting the dish prevents it from dropping into whatever you have in the petri dish.


What color does Candida fungi appear on Petri plates?

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What is the value of petri plates in micro biology?

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Why should you label the petri dishes correctly?

Labeling petri dishes correctly is important for proper identification of the samples being studied. This helps prevent mix-ups, ensures accurate data collection and analysis, and allows for traceability in case of any issues or discrepancies.


Importance of flaming the edges of the petri plates before and after pouring the media?

Flaming the edges of the petri plates before pouring the media helps to create a sterile environment by killing any microorganisms present on the surface. Flaming the edges after pouring the media helps to prevent contamination of the agar surface by airborne microorganisms during incubation.


How does the bacteria remain uncontaminated when the covers slightly ajar after pouring nutrient agar into petri dishes?

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What equipment can be used to grow bacteria?

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What is the birth name of Petri Liski?

Petri Liski's birth name is Petri Juhana Liski.