front 1 1) The counterstain used in the Gram stain is a basic dye. | back 1 Answer: TRUE |
front 2 2) In a completed Gram stain, gram-negative bacteria are colorless. | back 2 Answer: FALSE |
front 3 3) In a completed Gram stain, gram-positive bacteria are purple. | back 3 Answer: TRUE |
front 4 4) If acid-fast bacteria are stained with the Gram stain, they will stain gram-negative. | back 4 Answer: FALSE |
front 5 5) The limit of resolution of the compound microscope illuminated with visible light is approximately 0.2 μm. | back 5 Answer: TRUE |
front 6 6) Both phase-contrast microscopy and differential interference contrast microscopy are used to view the internal structures of cells without staining. | back 6 Answer: TRUE |
front 7 7) Cells viewed in darkfield microscopy appear similar to those stained with the negative stain. | back 7 Answer: TRUE |
front 8 8) The capsules and flagella of bacteria can be observed in gram-stained smears. | back 8 Answer: FALSE |
front 9 9) The greater resolution of the electron microscope compared to the compound microscope is due to the longer wavelengths of the electrons used to examine specimens. | back 9 Answer: FALSE |
front 10 10) Scanned probe microscopy is used to examine fine detail of molecular complexes, such as blood clots, or molecules, such as DNA. | back 10 Answer: TRUE |