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WorksheetsENV111 (pt2)
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
Spirochetes and spirilla are both spiral-shaped bacteria. However, they differ in that spirochetes have ___ and spirilla do not.
a)
tetrads
b)
endoflagella
c)
fimbriae
d)
peritrichous flagella
2.
When flagella are located around the entire bacteria cell, the arrangement is called
a)
amphitrichous
b)
peritrichous
c)
lophotrichous
d)
monotrichous
3.
An encapsulated bacterium can be virulent because the capsule
a)
is an endotoxin
b)
destroys host tissues
c)
resists phagocytosis
d)
interferes with physiological processes
4.
Which of the following is TRUE?
a)
A cell produces one endospore and keeps growing
b)
Endospores allow a cell to attach to solid surfaces
c)
Endospores are dormant structures
d)
Endospores perform binary fission
5.
Which one of the following statements about bacterial endospores is FALSE?
a)
An endospore is more complex than a vegetative cell
b)
An endospore is metabolically active
c)
An endospore has unique properties such as heat resistance
d)
An endospore is formed when growth conditions are unfavourable
6.
Good control of diseases that are spread by fecal contamination of food or water is best achieved by
a)
vaccination of the majority of the population
b)
improved sanitation, sewers, and water purification
c)
vector control
d)
prompt tracing of sexual contacts
7.
Which of the following is NOT a portal entry for pathogens?
a)
Mucous membranes
b)
Skin
c)
Parenteral route
d)
Blood
8.
The MOST common mode of transmission for pneumonia, diphtheria, and tuberculosis is by
a)
direct contact
b)
aerosols
c)
drinking contaminated water
d)
vectors
9.
An example of a disease transferred by direct contact is
a)
cholera
b)
tuberculosis
c)
gonorrhea
d)
malaria
10.
Exotoxins which attack a wide variety of cells are termed as
a)
leukotoxins
b)
cytotoxins
c)
enterotoxins
d)
hepatotoxins
11.
A virus that is carried by the Aedes aegypti mosquito is the causative agent for
a)
African sleeping sickness
b)
Rocky Mountain spotted fever
c)
Influenza
d)
Dengue fever
12.
All of the following are physical aspects needed for bacterial growth EXCEPT
a)
Temperature
b)
pH
c)
Osmotic pressure
d)
Vitamins
13.
Which of the following temperatures would MOST likely kill a mesophile?
a)
-50°C
b)
9°C
c)
37°C
d)
60°C
14.
Which one of the following is FALSE about agar?
a)
It liquefies at 100°C
b)
It solidifies at approximately 40°C
c)
It is a source of nutrients in culture media
d)
It is metabolized by few bacteria
15.
Which of the following is NOT a characteristic of bacteria?
a)
They are prokaryotic
b)
They have the same shape
c)
They have the ability to move
d)
They have cell walls containing peptidoglycan
16.
Which one of the following statements about yeasts is TRUE?
a)
Yeasts are fungi
b)
Yeasts are facultatively anaerobic
c)
Yeasts can form pseudohyphae
d)
All of the above
17.
The definitive host for Plasmodium vivax is
a)
human
b)
Anopheles spp.
c)
Aedes spp.
d)
Culex spp.
18.
___ is NOT a characteristic of pathogenic bacteria.
a)
Motile
b)
Rod shape
c)
Anaerobes
d)
Optimum growth at 29°C
19.
The ability of a virus to infect an organism is regulated by the
a)
host species
b)
type of cells
c)
availability of an attachment site
d)
protein capsid
20.
Phage lysozyme is released during the ___ stage.
a)
assembly
b)
penetration
c)
maturation
d)
attachment
21.
All of the following are waterborne diseases EXCEPT
a)
Tuberculosis
b)
Cholera
c)
Giardiasis
d)
Cryptosporidiosis
22.
Which one of the following pairs is a MISMATCH?
a)
Clostridium botulinum - tetanus
b)
Treponema pallidum - syphilis
c)
Mycobacterium tuberculosis - tuberculosis
d)
Chlamydia trachomatis - trachoma
23.
___ is the causative agent of pneumonia.
a)
Chlamydophila pneumoniae
b)
Chlamydophila psittaci
c)
Chlamydia trachomatis
d)
Rickettsia rickettsii
24.
Which one of the following is INCORRECTLY paired?
a)
Aedes albopictus - dengue
b)
Giardia lamblia - giardiasis
c)
Plasmodium ovale - malaria
d)
Entamoeba histolytica - cholera
25.
Which of the following diseases is spread by direct contact transmission?
a)
Syphilis
b)
Measles
c)
Influenza
d)
Tetanus
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