Why is the Gram stain considered differential?
It uses water to wash the excess stain. It distinguishes between two groups of bacteria. It describes the pathogenicity of the species. It is clinically important. It is used to study resistant bacteria. It distinguishes between two groups of bacteria...
Bio 205 Test Prep Questions and Correct Answers Why is the Gram stain considered differential? It uses water to wash the excess stain. It distinguishes between two groups of bacteria. It describes the pathogenicity of the species. It is clinically important. It is used to study resistant bacteria. ✅It distinguishes between two groups of bacteria. What is the clinical significance of the Acid -fast stain? It determines the virulence of a bacteria It distinguishes between cells that have a thick or thin peptidoglycan wall It can determine if the bacteria can survive phagocytosis. It can help diagnose tuberculosis It differentiates between motile and non -motile bacteria ✅It can help diagnose tuberculosis The opaque disk of the darkfield microscope causes which of the following regarding the image that is viewed? It causes light to be reflected off the specimen. It causes light to be transmitted through the specimen. It causes the specimen to appear upside down. c. It gives greater contrast to the internal structures of the specimen. It causes the specimen to appear backwards. ✅It causes light to be reflected off the specimen. Which microscope would a scientist use if they were studying the internal structures of a living specimen and wanted to get the greatest detail? DIC microscope Phase -contrast microscope Transmission electron Darkfield microscope Fluorescence microscope ✅DIC microscope Which of the following attaches the specimen to the slide while keeping it from moving and preserves integrity for observation? Adhesive Coverslip Fixing Freezing Staining ✅Fixing What would be used to understand morphology and arrangement? Special stain Simple stain Differential stain Flagella stain Wet mount ✅Simple stain Which stain distinguishes between cells that do or do not have mycolic acid? Gram Acid-Fast Endospore Flagella Capsule ✅Acid-Fast Which property of stains makes them perfect for staining bacteria? Hydrophilic Hydrogen Hydrophobic Ionic Covalent ✅Ionic Which of the following terms refers to how often a wavelength occurs? Resonance Amplitude Transmission Transduction Frequency ✅Frequency Which of the following microscopes makes use of refraction and interference of light? Phase -contrast Scanning electron Transmission electron Darkfield Brightfield ✅Phase -contrast Which of the following uses an acidic dye?
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