__________ intercalates between DNA bases, causing dead cells to stain red under a fluorescence scope.
A) Propidium iodide
B) Syto-9
C) Ethidium bromide
D) Crystal violet
E) Safranin

Question

Quizplus · Accepted Answer

Propidium iodide is commonly used to stain dead cells in fluorescence microscopy because it can only penetrate cells with compromised cell membranes, such as dead cells. It intercalates between DNA bases and emits a red fluorescence when excited by a specific wavelength of light. Syto-9 and Ethidium bromide can also be used to stain dead cells, but Propidium iodide is specifically mentioned in the question. Crystal violet and Safranin are not typically used for staining dead cells in fluorescence microscopy.

__________ Intercalates Between DNA Bases, Causing Dead Cells to Stain