W3-1: Microbial structure Flashcards Preview

Foundations > W3-1: Microbial structure > Flashcards

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

Who invented the first simple microscope?

Antony van Leeuwenhoek and Robert Hooke

2

Pasteur disproved which theory of microorganism generation?

Spontaneous generation

3

Koch's 4 postulates

  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

What is a virulence factor?

Anything that promotes infection

5

What was Fredrick Griffith's experiment?

6

5 categories of infectious agents

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

7

Why are dyp molecules generally positively charged?

so they better bond with the negative interior of cells

8

Steps in preparing a smear

  1. Spread culture
  2. Dry
  3. Heat fix
  4. Stain

9

6 types of bacteria

10

Gram stain results

(+) purple (crystal violet stain)

(-) redish-pink (crystal violet)

non-gram stainable: colorless

11

Gram (+) cell wall

Image Preview

12

Gram (-) cell wall

13

peptidoglycan (+) vs (-)

larger in gram (+) organisms

14

Components of peptidoglycan layer

linked peptides

sugars

15

Bacterial reproduction method

binary fission

16

Division plate name in bacteria

FtsZ ring

17

Action of pennicillin

DD-transpeptidase inhibitor