Quiz #6 Microorganisms and microscopes

PLTW

have a stage for the specimen to be viewed, can have more than one magnification level, have a condenser with iris diaphragm to control light, have ocular lenses that you look through

Compound microscopes:  (select all answers that apply)

is used for manipulating bacteria, includes keeping a clean workspace to decrease possible contamination, it is used in gene cloning, it keeps unwanted bacteria out of your experiment

Aseptic technique is important because:

they are well understood

An advantage of using bacterial cells to express proteins is that ________.

400X

If you are looking at a specimen on a compound microscope, what would be the total magnification given the following information?

Ocular lens magnification 10X

Objective lens magnification 40X

rods or bacilli, spirochaetes or corkscrews, cocci or spheres

Bacteria are categorized under the microscope by the following shapes

they do not correctly fold all proteins

A disadvantage of using bacterial cells to grow proteins is that ________.

may have ocular lenses that you look through, may have a stage for the specimen to be viewed, may be compound with two or more lenses in sequence, may have more than one magnification level, may have a condenser with iris diaphragm to control light

Microscopes facts: (select all answers that apply)

a Gram stain

Peptidoglycan in the cell wall of a bacterial cell is determined by ________.

bacilli

Rod-shaped bacteria such as Escherichia coli are called ________ based on the shape of the cells.

is a technique for creating clones of a single bacteria

A streaking method for plating bacteria onto an agar surface