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Streaking is used in microbiology to isolate a strain from a species of bacteria, so that this sample can be grown on a new culture.. Streak plates are used in this process to great effect.
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Why do streak plates need to be dry before inoculated?
If by inoculated you mean used, here is my answer if that is true; streak plates need to be dry because the powder left behind may react and change color to whatever that liquid is on the streak plate.
What is shale's streak?
Shale normally leaves a brown streak on unglazed porcelain plates. However, shale can also leave a white streak on unglazed porcelain plates.
Why are agar plates dried before being used for the preparation of dilution streak plates?
perhaps it is easier to streak that way, i mean when the agar is set and dry. .
Where should colonies appear in the case of streak plates?
When using streak plates, the colonies should appear along the streak lines. This is where the bacteria have been introduced and is the first place they will grow.
What are streaks used for?
Streaking is used in microbiology to isolate a strain from a species of bacteria, so that this sample can be grown on a new culture.. Streak plates are used in this process to great effect.
Why is a TSA used for the streak plate?
Tryptic soya agar plates are used for streaking as it is a very general agar (ie not selective) and it promotes the growth of a broad spectrum of micoorganisms
Can streak or spread plates isolate pure cultures from mixed bacteria?
YES
Why are streak plates used to test minerails?
Scratching a mineral across a streak plate will result in a streak which represents the true color of a mineral without impurities or inclusions that can influence a particular specimen's color. The mineral quartz can appear in a wide variety of colors, but the streak of any colored quartz specimen will still be white. The 'streak' color is one characteristic of a mineral which will aid in its identification.
Why is the streak-stab technique preferred rather than incubating the plates anaerobically?
The streak-stab technique is preferred over incubating the plates anaerobically because when isolating colonies allows biochemical testing to be performed. When the plate is incubated anaerobically it lacks oxygen and can not be biochemically tested.
Why is the streak-stab technique on blood agar preferred over incubating the plates anaerobically?
Because Pikachu is the best.
How streak is used to distinguish between gold and pyrite?
Gold will have a yellow metallic streak, pyrite will have a greenish-black streak.
Does the streak test work with all minerals?
No it does not work with all minerals. For if you did not know streak plates have a hardness of 7 (maybe a little lower or higher) on the Mohs scale. Some minerals are harder than 7 though. If they are harder they will not work with the streak test. some examples are Diamond, topaz, and corundum.
