WorksheetsMicrobiology: Chapters 1 to 6
Total questions: 33
Worksheet time: 33mins
What shape is E. coli?
bacillus
vibrio
filamentous
spirochete
Which of the following are thin, flexibly coiled cells?
bacillus
vibrio
spirochetes
fusiform bacilli
What is structure E on this diagram of the bacterial cell called?
ribosomes
pilli
fimbriae
plasmids
Coccus-shaped cells found in a cluster of four is called:
tetrad
sarcina
streptococcus
staphylococcus
If cells are a bluish purple colour under the microscope after performing a gram stain, what does this indicate?
Gram positive cell wall
Gram negative cell wall
The cells must be dyed with safranin
The cells need to be decolourized with alcohol
What is the correct order of the gram stain technique?
crystal violet > iodine > alcohol wash > safranin
safranin > iodine > alcohol wash > crystal violet
iodine > crystal violet > alcohol wash > safranin
alcohol wash > iodine > crystal violet > safranin
What is TRUE about gram negative cell walls?
They have a thin layer of peptidoglycan
They look purple under a microscope
They are much simpler than gram positive cell walls
They are easily penetrated by drugs
What is the test for detection of endotoxins called?
Limulus Amoebocyte Lysate (LAL)
Gram stain
Aseptic technique
Lipopolysaccharide test
The cytoplasmic membrane is made up of 60-70% of which of the following?
protein
lipids
phospholipids
carbohydrates
A single circular molecule of double-stranded DNA that contains the genetic information necessary for functioning of the cell is called the:
chromosome
ribosome
centrosome
lysosome
What is the main function of ribosomes?
Carry out protein synthesis
Help cells move
Assist in transport of large molecules across the plasma membrane
Play a role in cell shape determination
Long whip-like appendages that enable bacteria to move are called:
flagella
fimbriae
pilli
helix
Fungi grow at temperatures below:
25ºC
20ºC
10ºC
35ºC
Yeasts and moulds are prokaryotic organisms.
True
False
Which of the following is NOT a morphological category of fungi?
Yeast-like fungi
Dimorphous fungi
Filamentous fungi
Unicellular moulds
A process of reproduction where the offspring emerge as a bud on the side of the parent cell is called:
budding
binary fission
mitosis
meiosis
Which of the following is a fungal infection?
Tinea pedis (athlete's foot)
Common cold
Shingles
Herples simplex 1
What is a fungal infection of the toenails called?
onychomycosis
tine pedis
tinea cruris
candida
Single-celled eukaryotic organisms that can cause a variety of severe human infections are called:
Protozoa
Plasmids
Viruses
Bacteria
Protozoal infections are more common in tropical countries.
True
False
There is an effective malaria vaccine available.
True
False
Some viruses may be __________ and survive in their host cells without killing them. They may be activated at a later date to reproduce and kill the host cell
latent
active
transmitted
susceptible
Pathogenic bacteria greatly outnumber harmless bacteria (about 200,000 to 1).
True
False
Which of the following is a benefit of microorganisms?
May lead to antibiotic resistance
Contaminate and spoil nonsterile medication
Cause noninfectious diseases
Used in the manufacture of antibiotics, steroids, vaccines and many biotechnology products
Antibiotics are effective against viral infections.
True
False
______________ is normally effective for the treatment of Trichomonas and Giardia infections.
metronidazole
clarithromycin
amoxicillin
ciprofloxacin
What does sterile mean in a pharmaceutical context?
complete absence of life
unwanted transfer of microorganisms from one object or location to another
procedures for handling hazardous organisms
heat, radiation or other sterilization procedure at the end of the manufacturing process
UK government’s Advisory Committee on Dangerous Pathogens has assigned microorganisms into one of four categories, which class contains the most dangerous microorganisms?
Hazard class 1
Hazard class 2
Hazard class 3
Hazard class 4
What gelling agent is preferred for use in petri dishes?
agar
broth
protein
b vitamins
Any organism that does not require oxygen for growth is called a/an:
anaerobe
aerobe
facultative anaerobe
amoeba
What phase of the bacterial growth cycle involves increase in cell numbers?
exponential phase
lag phase
stationary phase
decline phase
Which of the following factors influence microbial growth?
temperature
pH
nutrient availability
all of the above
A microorganism that prefers a growth temperature of over 45ºC is called a:
thermophile
mesophile
psychrophile
none of the above
