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Microbiology 275 Test 2
Mr. Grimsley
23
Microbiology
Undergraduate 2
02/05/2013

Additional Microbiology Flashcards

 


 

Cards

Term

 

 

 

What are the three shapes of bacteria?

Definition

1. cocci

2. spiralli

3. bacilli

Term

 

 

What are the 5 patterns of Coccus?

Definition

1. diplo-2

 

2. Staph-grape-like cluster

 

3. strep-long chain

 

4. tetrad-square

 

5. saracinici-multiples of 8

Term

 

 

What are the clustering patterns of bacillus? (4)

Definition

1. Diplo-2

 

2. Strep-long chain

 

3. vibrio-v-shape

 

4. palisade-cluster/group

Term

 

 

What are the 2 patterns of spirals?

Definition

1. spirilla (rigid helix)

 

2. spirachete (flexible helix w/sheath around flagella)

Term

 

 

 

What does dessication mean?

Definition

 

 

Dessication is the process of a cell drying out. A capsule will keep the bacterial sell from dessication for approx. 3 days.

Term

 

 

 

What effect does heat have on bacteria?

Definition

 

 

 

 

depends on species...some love the heat and others may spore

Term

 

 

 

What effect does the cold have on bacteria?

Definition

 

 

 

Pathogens and spores can grow in cold conditions..I.E. phsychophiles

Term

 

 

 

 

What effect does freezing have on bacteria?

Definition

 

 

 

 

Again, depends on species...some thrive, others die

Term

 

 

 

What effect does radiation have on bacteria?

Definition

 

 

 

 

Very high doses can kill MOST bacteria

Term

 

 

 

What does the term hypertonic mean?

Definition

 

 

 

Hypertonic is a solution having higher concentrations of solutes than H20

Term

 

 

 

What does the term hemolysis mean?

Definition

 

 

 

 

Hemolysis is the complete breakdown of blood

Term

 

 

 

What are the 3 types of hemolysis?

Definition

1. Beta-bacteria completely eats RBC's

 

2. Alpha-bacteria paritally eats thru but  hemoglobin is not completely destroyed.

 

3. Gamma-No destruction of RBC's

Term

 

 

 

What is differential staining?

Definition

 

 

 

 

Differential staining is the use of more than 1 dye to differentiate between gram+ and gram- cells

Term

 

 

 

What are the 4 components of a gram stain kit?

Definition
  1. Crystal Violet
  2. Mordant-Iodine
  3. Decolarizing Agent-Alcohol
  4. Safranin
Term

 

 

According to the gram stain procedure, what are the two groups of bacteria?

Definition

 

 

1. Gram+ stain Crystal-violet/purple

 

 

2. Gram- stain Safranin/red

Term

 

 

 

 

Describe the Gram- cell wall

Definition

 

Gram- cell wall is thin, with a thin peptidoglycan layer, loosely-bound polysaccharides, cell wall & cell membrane are further apart and it has porins

Term

 

 

 

 

Describe the Gram+ cell wall

Definition

 

 

 

The Gram+ cell wall is thick, with a thick layer of peptidoglycan, densely packed polysaccharides, the cell wall and cell membrane are close together and they do not have porins

Term

 

 

 

Describe Flaming and Fixing

Definition

 

 

Flaming and Fixing is the process of passing a slide through a flame in order to kill bacteria.

Term

 

 

 

What is meant by smear?

Definition

 

 

 

Smear is when you place bacteria on a slide usually in a zig-zag or "S" like motion

Term

 

 

 

Describe Differetial Media

Definition

 

 

 

Differential Media ,such as the agar, is used to identify different types of bacteria

Term

 

 

 

What does the term culturing refer to?

Definition

 

 

 

 

Culturing refers to the growing of bacteria on or in a media?

Term

 

 

 

 

What is culture media?

Definition

 

 

 

Culture media is a nuritive substance on or in which bacteria is grown (Blood Agar)

Term

 

 

 

What is Agar?

Definition

 

 

Agar is a boiled seaweed product which solidifies quickly, cools quickly, has many nutrients and favors the growth of bacteria

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