What is the reason that a modern electron microscope (TEM) can resolve biological images to the subnanometer level, as opposed to tens of nanometers achievable for the best super-resolution light microscope?
A) The focal length of the electron microscope is significantly longer.
B) Contrast is enhanced by staining with atoms of heavy metal.
C) Electron beams have much shorter wavelengths than visible light.
D) The electron microscope has a much greater ratio of image size to real size.
E) The electron microscope cannot image whole cells at one time.
Electron Transport Chain
microscope view of an onion root tip
Gram-stained bacteria on a microscope slide. (A) Red rod-shaped cells are Escherichia coli (Courtesy ...
Human chromosomes as seen at metaphase of mitosis in the scanning electron microscope. The replicate
(a) A metaphase array of chromosomes as viewed in the microscope. (b) The computer-derived karyotype
Electron micrograph and interpretive drawing of simultaneous transcription of genes in E. coli