You are working on a project that involves the direct three-dimensional observation of DNA molecules.The microscope that would give you the best information at this time would be the
A)light microscope.
B)transmission electron microscope.
C)scanning tunneling microscope.
D)phase-contrast microscope.
E)none of the above

Question

Quizplus · Accepted Answer

The scanning tunneling microscope (STM) is the best choice for direct three-dimensional observation of DNA molecules. STM utilizes a sharp probe to scan the surface of the sample, allowing for high-resolution imaging of the molecular structure. It can achieve atomic resolution and is ideal for studying the topography of biological molecules such as DNA. Light microscopes and phase-contrast microscopes do not offer the necessary resolution for seeing individual molecules, and transmission electron microscopes require samples to be coated in heavy metals which can destroy the delicate structure of DNA.

You Are Working on a Project That Involves the Direct