Question

The best microscope to study ultrastructure of cell is
A. Phase contrast microscope
B. Electron microscope
C. Scanning electron microscope
D. Fluorescent microscope

Answer 1

Hint: A microscope is an instrument that produces enlarged images of small objects. The microscope may provide dynamic images also.

Complete Answer:
- There are different types of microscope. Among the different types of microscopes, the electron microscope is the powerful one available and used today, allowing researchers to view a specimen at a nanometer size.
- The Transmission Electron Microscope is a type of electron microscope that is capable of producing images 1 nanometer in size. Another type of electron microscope is the scanning electron microscope that is 10 times less powerful than the transmission electron microscope. They produce high-resolution, sharp, black, and white 3D images. The transmission electron microscopes and scanning electron microscopes have practical applications in fields such as biology, chemistry, metallurgy, and industry. As well as, they provide information on the topography, morphology, composition, and crystallographic data of samples.

- A simple microscope is a type of microscope that was considered to be the first microscope. It was a magnifying glass.
- A compound microscope is another type of microscope that offers better magnification than a simple microscope.
- A stereo microscope or dissecting microscope also provides magnification. A binocular microscope is generally used to look at opaque objects and they do not require slide preparation.
- A confocal microscope is another type of microscope that makes use of laser light to scan samples that have to be dyed.
- An electron microscope is used to find out a wide range of biological and inorganic specimens.

So the correct answer for the question is option b) electron microscope.

Note: Electron microscope is generally used to investigate the specimens such as biopsy samples, metals, and crystals, and also for quality control and failure analysis.