Biology, 20.02.2020 03:41 BackUpAccount

Beginning within the nucleus, the first step leading to the synthesis of a polypeptide is .

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Biology, 21.06.2019 20:00, skylex

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip. nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule. true/false

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Biology, 21.06.2019 23:00, alishajade

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

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Biology, 22.06.2019 01:30, dunqueeezy6295

What did hunter gathers do to alter the environment?

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Biology, 22.06.2019 07:50, waves2114

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?