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By doing differential stains on an unknown organism, you can learn more about that organism. One of the most helpful stains would be the Gram stain. The gram stain will differentiate from Gram positive and Gram negative cells, narrowing your bacteria down a lot. Other stains include: Acid-Fast stain, Capsule stain, Endospore stain, and PHB stain.
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Describe the microscopic appearance of encapsulated streptococcus if stained with safranin?
Safranin (red) is used in gram staining and endospore staining as the secondary stain. Nigrosin is used in negative staining, staining only the background and not the bacteria. Therefore, the bacteria within the capsule would stain red from the safranin. (Like in endospore staining and negative gram staining, safranin would stain the bacteria red.) Nigrosin would stain the background of the organism just as it would in negative staining. Bacteria (within capsul): stained safranin red Capsule (outer layer of bacteria): clear Background of organism: stained dark with Nigrosin
What is the difference between leishman staining and giemsa staining?
Leishman staining is used for staining blood in microscopy and its purpose is to both identify and differentiate trypanosomas, leucocytes and malaria parasites. Giesma staining is used to stain DNA region, specifically chromosomes in order to locate aberrations like rearrangement and translocations.
What is the purpose of staining the smear in malachite green during spore staining?
the purpose of boiling of smear in malachite green is to forces a stain to penetrate the endospore wall, it is necessary to heat the slide and the stain to prod the wall to allow the stain to enter.
To perform a testcross scientists cross an organism with an unknown genotype with what kind of organism?
homozygous recessive
What is a testcross in biology?
a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring
What is the purpose of spore staining?
not sure
What is the definition of negative staining?
negative staining is when the micro-organism on slide is not stained.. instead the rest of the material on the slide gets stained and the organism stands out prominently unstained.. this occurs because that organism has a thick capsule around it which is non-stainable with that stain.. example is pneumococci staining with India ink.
What is the purpose of differential staining?
differential staining is a staining technique used to stain colorless bacteria against a dark background.
What is the purpose of staining?
to detect bacterial stracture
What is the purpose of albert staining?
to detect bacterial stracture
Is a dichotomous key used to identify unknown organism?
Yes, a dichotomous key is used to identify an unknown organism.
What is thee purpose of adding methylene blue to the specimen?
Adding methylene blue to a slide will stain animal cells and make the nuclei more visible.
Describe the microscopic appearance of encapsulated streptococcus if stained with safranin?
Safranin (red) is used in gram staining and endospore staining as the secondary stain. Nigrosin is used in negative staining, staining only the background and not the bacteria. Therefore, the bacteria within the capsule would stain red from the safranin. (Like in endospore staining and negative gram staining, safranin would stain the bacteria red.) Nigrosin would stain the background of the organism just as it would in negative staining. Bacteria (within capsul): stained safranin red Capsule (outer layer of bacteria): clear Background of organism: stained dark with Nigrosin
What is the difference between leishman staining and giemsa staining?
Leishman staining is used for staining blood in microscopy and its purpose is to both identify and differentiate trypanosomas, leucocytes and malaria parasites. Giesma staining is used to stain DNA region, specifically chromosomes in order to locate aberrations like rearrangement and translocations.
What are the advantages of differential staining procedures over simple staining techniques?
Using multiple stains can better differentiate between different microorganisms or structures/cellular components of a single organism.
What advantages of differential staining procedures over the simple staining technique?
Using multiple stains can better differentiate between different microorganisms or structures/cellular components of a single organism.
What is the purpose of staining the smear in malachite green during spore staining?
the purpose of boiling of smear in malachite green is to forces a stain to penetrate the endospore wall, it is necessary to heat the slide and the stain to prod the wall to allow the stain to enter.
