Microbio

Question 1

What is mannitol salt agar used to grow?
A. Streptococcus
B. Staphylococcus
C. E. Coli

Answer 1

B. Staphylococcus

Question 2

Deoxyribonuclease in a medium inhibits ____?
A. Transcription
B. Translation
C. Transformation

Answer 2

C. Transformation

Question 3

Which of the following are negri bodies seen in?
A. Alzheimers
B. Rabies
C. Measles
D. Mumps

Answer 3

B. Rabies

Question 4

Which of the following is an advantage of passive immunity?

Answer 4

A. Rapid availability of protection

Question 5

Which of the following release IL-2?
A. B-lymphocytes
B.  T-lymphocytes
C.  Monocytes
D. Plasma cells

Answer 5

B. T-lymphocytes

Question 6

Which of the following is caused by a virus?
A. Measles
B. Toxoplasmosis
C. Lyme disease

Answer 6

A. Measles

Question 7

Which of the following describes destruction of all microorganisms?
A. Sanitization
B. Sterilization
C. Autoclaving

Answer 7

B. Sterilization

Question 8

Fever blisters are associated with which of the following?
A. Herpes simplex type I
B. Herpes simplex type II
C. Gonorrhea

Answer 8

A. Herpes simplex type I

Question 9

Which of the following is an acid fast bacterium?
A. Staphylococcus
B. Streptococcus
C. Mycobacterium

Answer 9

C. Mycobacterium

Question 10

A medium on which colonies of lactose fermenting bacteria are easily distinguished from non-lactose fermenting colonies by their appearance is an example of:
A. a selective medium
B. a differential medium
C. a medium which is both selective and differential
D. a medium which allows recognizing rickettsiae
E. a technique of little use in diagnosis

Answer 10

B. a differential medium

Question 11

In general what are exotoxins?
A. lipopolysaccharides, poor antigens, produced by gram-negative bacteria
B. proteins, good antigens, produced by gram-negative bacteria
C. proteins, poor antigens, produced by gram-positive bacteria
D. proteins, good antigens, produced by gram-positive bacteria

Answer 11

D. proteins, good antigens, produced by gram-positive bacteria

Question 12

Which is the basis for subclassifications of staphylococci?
A. Quellung reaction
B. C substance present in cell wall
C. M substance (protein)
D. phage typing
E. antibiotic susceptibility and resistance characteristics

Answer 12

D. phage typing

Question 13

Bacterial transformation depends on;
A. a virus intermediate
B. a competent cell taking up DNA from growth medium
C. a conjugation tube forming
D. DNA-ase secreted into the medium
E. heavily encapsulated organisms making contact with each other

Answer 13

B. a competent cell taking up DNA from growth medium

Question 14

What does a "hanging drop" procedure identify?
A. a motile organism
B. a gram + bacterium
C. a gram - bacterium
D. an encapsulated microbe
E. an acid-fast cell

Answer 14

A. a motile organism

Question 15

What is the connector between donors and recipients in bacterial conjugation?
A. A flagellum
B. double stranded DNA
C. single strand RNA
D. a pilus
E. an axial filament

Answer 15

D. a pilus

Question 16

Which of the following is most closely related to the Rickettsias?
A. blue-green algae
B. mites
C. viruses
D. bacteria
E. ticks

Answer 16

C. viruses

Question 17

Which does not relate to the true bacteria?
A. pili
B. capsule
C. cell wall
D. fermentation
E. distinct nuclear membrane

Answer 17

E. distinct nuclear membrane

Question 18

WOF is the method of reproduction of true bacteria?
A. sporulation
B. binary fission
C. transformation
D. transduction
E. all of the above

Answer 18

B. binary fission

Question 19

The chromosome of E. coli consists of approximately \_\_\_\_ genes.
A. 1
B. 2
C. 23
D. 5000
E. 4.5 million

Answer 19

D. 5000

Question 20

Who laid the groundwork for modern observational microbiology and was born in the Dutch republic during the 17th century?
A. Spinoza
B. Rembrant
C. Van Leeuwenhoek
D. Van Rumstead
E. Koch

Answer 20

C. Van Leeuwenhoek

Question 21

Spirochetes generally possess:
A. rigid cell wall
B. pili
C. axial fibers
D. chromoplasts
E. conjugation tubes

Answer 21

C. axial fibers

Question 22

WOF is NOT an anatomical structure of true bacteria?
A. pilus
B. flagellum
C. nuclear membrane
D. plasma membrane
E. DNA

Answer 22

C. nuclear membrane

Question 23

WOF pertains to the outermost covering of a virus particle?
A. capsid
B. flagellum
C. cell
D. capsule
E. spore coats

Answer 23

A. capsid

Question 24

Physiologically, viruses are most closely related to:
A. bacteria
B. rickettsia
C. fungi
D. mold
E. yeast

Answer 24

B. rickettsia

Question 25

``` Which procedure is used to differentiate genus Mycobacterium from other bacterial genera? A. gram stain B. spore stain C. acid-fast stain D. Widal test ```

Answer 25

C. acid-fast stain

Question 26

``` When the genes for a certain pway are always "turned on" in the cell, the enzymes are said to be: A. inducible B. repressible C. constitutive D. mutated ```

Answer 26

C. constitutive

Question 27

``` What is the reaction where 1,3 diphosphoglycerate loses one of its PO4 molecules to form ATP from ADP called: A. fermentation B. oxidation C. oxidative phosphorylation D. substrate level phosphorylation ```

Answer 27

D. substrate level phosphorylation

Question 28

``` Streptococcus would give WOF fermentation products from glucose? A. butyl alcohol and H2 B. 2,3 butane diol C. lactate D. ethanol and CO2 E. expectorate ```

Answer 28

C. lactate

Question 29

Identify the function associated with the cytochrome system: A. it uses ATP to produce H2O B. it drains electron energy to produce ATP C. it removes electrons from glucose D. it adds electrons to NAD

Answer 29

B. it drains electron energy to produce ATP

Question 30

``` NAD contains: A. nicotinic acid and adenlytic acid B. nicotinic acid and 3 PO4 C. thiamine D. thymine ```

Answer 30

A. nicotinic acid and adenlytic acid

Question 31

``` What is the composition of a virus? A. lipid and protein B. carbohydrate and protein C. protein and nucleic acid D. RNA and DNA ```

Answer 31

C. protein and nucleic acid

Question 32

``` What is a lysozyme? A. amylase B. proteolytic enzyme C. mycopolypeptidase D. gelatinase ```

Answer 32

B. proteolytic enzyme

Question 33

``` The family Lactobacillaceae can be divided by whether the bacteria are: A. gram + or gram - B. produces of ethanol and CO2 C. homo or heterofermentative D. A and B ```

Answer 33

C. homo or heterofermentative

Question 34

``` Who was the main contributor to the modern germ theory of disease? A. Hooke B. Lister C. Koch D. Van Leeuwenhoek E. Bacon ```

Answer 34

C. Koch

Question 35

``` WOF is selective for gram - organisms? A. blood agar B. Simmons' citrate agar C. eosin methylene blue D. nutrient broth E. chocolate agar ```

Answer 35

C. eosin methylene blue

Question 36

``` What is the correct classification for the mordant in a gram stain? A. safranin B. crystal violet C. H2O D. alcohol E. Grams iodine ```

Answer 36

E. Grams iodine