MIC 102 - Midterm 1 questions with correct answers

Light microscopy CORRECT ANSWER Limited ability to visualize bacterial components or distinguish between bacteria without doing something extra Electron microscopy CORRECT ANSWER Can view exterior and internal structures, smallest specimens Phase-contrast microscopy CORRECT ANSWER Refracts the light that goes through the specimen; can see detail, live cells Fluorescence microscopy CORRECT ANSWER Use of fluorochromes that emit light of specific wavelengths when excited by light of a different wavelength Glycocalyx CORRECT ANSWER Capsule, slime layer - allows cells to adhere to surfaces and each other, "sugar coat" Gram-(positive/negative) bacterial cells have an outer cell membrane and inner cell membrane CORRECT ANSWER negative Cells in a hypertonic solution leads to _______________ CORRECT ANSWER plasmolysis (cells shrink) Cells in a isotonic solution leads to ______