Chapter 4

Question 1

Microscope that can examine cells in living state

Answer 1

Dark-field

Question 2

Microscope not useful
in the study of living microorganism

Answer 2

Transmission Electron

Question 3

Refers to the ability of the lenses to distinguish fine two points as distinct and separate

Answer 3

Resolution

Question 4

Achieved when light rays from an illuminator are passed through a condenser

Answer 4

Magnification

Question 5

Refers to the light bending ability of the medium

Answer 5

Retractive index

Question 6

Fine detail of objects such as viruses or bacterial flagella can be seen by thus technique

Answer 6

Negative staining

Question 7

Used to make observations of intercellular structures, the material for examination must be extremely thin

Answer 7

Ultrathin sectioning

Question 8

Developed to prepare sections of the specimen without resorting to the chemical treatment of the fixation process, which can produce artifacts

Answer 8

Freeze-Etching

Question 9

special techniques developed making it possible to locate chemical constituents of the cell

Answer 9

Localization of the Cell Constituents

Question 10

Limitations of an electron microscope

Answer 10

drying process may alter some morphological characteristics

Question 11

Cytochemical method in which the location of a particular chemical constituent in a specimen is determined by observing the site at which radioactive material becomes positioned

Answer 11

Auto radiography

Question 12

Soecific microscope that reveals bumps and depressions of the atoms on the surface

Answer 12

Scanning microscope

Question 13

the ability of the lenses to distinguish two points as distinct and separate

Answer 13

resolution

Question 14

a compound microscope that uses a computer to process the image to produce two or three dimensional images of the cells

Answer 14

scanning electron microscope

Question 15

E. coli was named after?

Answer 15

Theodor Escherich