Microbilology

Question 1

What are the classification of living organism by cell type?

Answer 1

Prokaryotes ( Bacteria , Archaea)

Eukaryote ( fungi, Protozoa , human and plant cells)

Question 2

What are the common components in both prokaryotes and eukaryote?

Answer 2

Cells
cell membrane
Ribosomes

Question 3

Mention 5 types of infection agents ?

Answer 3

1) Bacterium
2) protozoan
3) virus
4) fungus
5) helminth

Question 4

What the meaning that bacteria is ubiquitous?

Answer 4

Found all over the nature

Question 5

T or F Bacteria doesn’t contain genetic and protein

Answer 5

F

Question 6

What are the shapes of Bacteria?

Answer 6

1) coccus ( spherical)
2) Bacillus ( rod shaped)
3) spiral

Question 7

Mention different arrangement of cocci ?

Answer 7

1) Dipolcocci ( pairs)
2) coccobacili
3) staphylococci ( clusters)
4) streptococcui ( chains)

Question 8

What is the importance of cell wall ?

Answer 8

1) a rigid , ductile structure
2) gives Bacteria their definitive shape
3) determine the characteristics of gram stain
4) antigen are present on the cell wall : virulence & immunity
5) peotidoglycann (murein)

Question 9

What is peptidoglycan ?

Answer 9

1) complex carbohydrates
2) forms strong mesh surrounding the cell
3) unique to Bacteria

Question 10

Who discover the gram stain ?

Answer 10

Hans Christian  gram 
, separates most Bacteria into two groups. 
Gram positive  ( violet - purple) 
Gram negative ( red - pink )

Question 11

What procedure in gram staining ?

Answer 11

1) Crystal violet ( 30 s )—- water rinse
2) Gram iodine
3) wash ethanol or acetone
4) safranin

Question 12

Who have the 
thick peptidoglycan ()
Thine peptidoglycan ()

Answer 12

1) gram positive

2) gram negative

Question 13

What are the components?

Answer 13

1) Thick layer peptidoglycan
2) Teichoic acid
3) lipotechoic

Question 14

Mention different states that arise from Bacteria and human interaction?

Answer 14

1) Health
2) Disease — any harmful alteration to physiological and metabolic state of the host
2) infection Disease — alteration caused by microorganisms or its products (toxins)
3) carrier— person who harbors the infection organism with no obvious disease
4) death

Question 15

1) what are the characteristics of the normal flora

Answer 15

1) rapidly
2) during and shortly after brith
3) changes continuously throughout life
4) cells in the human body 10 13
5) Bacteria associated with them
Associated with areas exposed to external environment

Question 16

Mainly the microorganisme in the flora of the skin are ?

Answer 16

1) gram positive bacteria
Like corynebacterium
, staphylococci ,
Propionibacterium

Question 17

Where the acne show ?

Answer 17

Below the surfaces ,

Hair follicular, sweat gland , propionibacterium

Question 18

When the streptococcus mutant act on the sucrose they produce what ?

Answer 18

Dextran and levan

Question 19

What is the organ that is hostile for bacteria?

Answer 19

Stomach

Question 20

What is the cause of the ulcer ?

Answer 20

Helicobacter pylori