W3-1: Microbial structure Flashcards Preview

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Flashcards in W3-1: Microbial structure Deck (17)
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1
Q

Who invented the first simple microscope?

A

Antony van Leeuwenhoek and Robert Hooke

2
Q

Pasteur disproved which theory of microorganism generation?

A

Spontaneous generation

3
Q

Koch’s 4 postulates

A
  1. pathogen present in all disease cases–absent in healthy
  2. grow in pure culture
  3. grown cells must cause disease in healthy animals
  4. reisolate cells-show they are the same
4
Q

What is a virulence factor?

A

Anything that promotes infection

5
Q

What was Fredrick Griffith’s experiment?

A
6
Q

5 categories of infectious agents

A
  1. Helmniths (worms)
  2. Protozoa
  3. Fungi
  4. Bacteria
  5. Viruses
7
Q

Why are dyp molecules generally positively charged?

A

so they better bond with the negative interior of cells

8
Q

Steps in preparing a smear

A
  1. Spread culture
  2. Dry
  3. Heat fix
  4. Stain
9
Q

6 types of bacteria

A
10
Q

Gram stain results

A

(+) purple (crystal violet stain)

(-) redish-pink (crystal violet)

non-gram stainable: colorless

11
Q

Gram (+) cell wall

A
12
Q

Gram (-) cell wall

A
13
Q

peptidoglycan (+) vs (-)

A

larger in gram (+) organisms

14
Q

Components of peptidoglycan layer

A

linked peptides

sugars

15
Q

Bacterial reproduction method

A

binary fission

16
Q

Division plate name in bacteria

A

FtsZ ring

17
Q

Action of pennicillin

A

DD-transpeptidase inhibitor