Question

The most likely method used to determine the structural details of a cell organelle is

• A. Autoradiography
• B. Microdissection
• C. Electron microscopy
• D. Phase contrast microscopy

Answer 1

Answer: (C)

Electron microscopy

The electron microscope is the best device to determine the structural details of a cell. It can magnify objects up to $250,000-400,000$ times. Its resolving power is $1000$ times more than the light microscope. This resolution is because of low wavelength $\left(0.005nm\right)$ of the electron beam used as light source. An electron microscope is made up of electromagnetic lenses. The beam of electrons is focussed on the objects with the help of a condenser lens and a magnified image of the object is formed by the objective lens. This magnified image is further magnified by a projector lens and final image is produced on the fluorescent screen.

So the correct answer is 'Electron microscopy'.