Questão 331807

Língua Inglesa · 2022

Questão

ID 331807

Disciplina: Língua Inglesa

Assunto: Interpretação de Texto | Text Interpretation

Ano: 2022 Banca: CESPE CEBRASPE - Centro de Seleção e de Promoção de Eventos UnB Órgão: Rede Sarah de Hospitais de Reabilitação

In one of the most common staining methods in microbiology, the material is properly prepared and dried on a slide and then fixed with methanol or gentle heat, after which it is stained with crystal violet, Gram iodine, methanol, and safranin. In this procedure, it is expected that

Alternativa A:
organisms that have a Gram-positive cell wall will resist decolorization with methanol and will retain the purple color of the crystal violet.
Alternativa B:
Gram-negative organisms will not be stained by the crystal violet, as they do not have peptidoglycan in their cell walls.
Alternativa C:
Gram-positive organisms will show a brown stain caused by the exposure to iodine, which stains both lipid bilayers of these organisms.
Alternativa D:
organisms that have a Gram-negative cell wall will be devoid of safranin staining, as their cell wall prevents safranin access to the lipid bilayer.

Estatísticas Cadernos

Questão 331807

Continue estudando na plataforma