quizzes for muchovej

What is the name of a method used as a means of isolating organims from a mixed culture?

(Quadrant) Streak Plate

The lens that focus light through the specimen.

Condenser

You may distinguish between bacteria by solely preparing simple stain slides.

False

The eyepiece of a microscope that remagnifies the image formed by the objective lens.

Ocular

You may determine shape, arrangement, and size when preparing simple stain slides.

True

Mixing type A blood with anti-A antibodies will cause this kind of reaction

agglutination

"Y" shaped proteins that are created by an organism and which bind to antigens

antibody

Any chemical that is recognized as non-self and that triggers an immune response

antigen

You should carry the microscope with [a] hands (one under the [b] and one around the [c])

both, base, neck

A liquid medium usually used for rapid growth or dilutions in test tubes or flasks

broth

medium used to distinguish among organisms based on physical differences shown by the colony of the bacterium or color of the medium

differential media

A test that tests for the presence of antigens

direct test

Antibodies created by the fusion of plasma cells with a myeloma cell

monoclonal

A test which determines the presence or absence of what is being tested for.

qualitative test

A test which determines the amount of what is being tested for.

quantitative

medium that inhibits the growth of certain microorganisms and therefore favors the growth of desired microorganisms

selective media

a medium used to determine motility of a bacterium

semi-solid media

In theory, a [a] is deposited on solid nutrient medium and it begins to [b]: one cell makes two, [c] make [d], four make [e] (exponential growth) and keeps growing. From these cells, a bacterial [f] is formed where the original cell (CFU) was deposited. When you transfer this colony to a new sterile [g], using [h] techniques, you obtain a [i] [j].

single cell divide two four eight colony medium aseptic pure culture

Bacterial specimens are very [a] as well as [b], therefore we apply stain(s) to the cells to improve [c], allowing these cells to become more [d] under the microscope.

small transparent contrast visible

A medium with a thickener that allows growth of colonies on the surface only

solid media

If you can focus your slide under the lower powers, but are unable to focus under the higher powers (40x and oil), one likely reason is:

the slide is turned upside down.

Two reasons why you should clean your microscope before and after use are:

to remove any harmful 'material' from the ocular. to remove oil from the oil immersion lens.