W3-1: Microbial structure

Question 1

Who invented the first simple microscope?

Answer 1

Antony van Leeuwenhoek and Robert Hooke

Question 2

Pasteur disproved which theory of microorganism generation?

Answer 2

Spontaneous generation

Question 3

Koch’s 4 postulates

Answer 3

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

Question 4

What is a virulence factor?

Answer 4

Anything that promotes infection

Question 5

What was Fredrick Griffith’s experiment?

Answer 5

Question 6

5 categories of infectious agents

Answer 6

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

Question 7

Why are dyp molecules generally positively charged?

Answer 7

so they better bond with the negative interior of cells

Question 8

Steps in preparing a smear

Answer 8

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

Question 9

6 types of bacteria

Answer 9

Question 10

Gram stain results

Answer 10

(+) purple (crystal violet stain)

(-) redish-pink (crystal violet)

non-gram stainable: colorless

Question 11

Gram (+) cell wall

Answer 11

Question 12

Gram (-) cell wall

Answer 12

Question 13

peptidoglycan (+) vs (-)

Answer 13

larger in gram (+) organisms

Question 14

Components of peptidoglycan layer

Answer 14

linked peptides

sugars

Question 15

Bacterial reproduction method

Answer 15

binary fission

Question 16

Division plate name in bacteria

Answer 16

FtsZ ring

Question 17

Action of pennicillin

Answer 17

DD-transpeptidase inhibitor