SBI3C
Microbiology Unit
Name: __________________
Date: ___________________
MICROBIOLOGY UNIT TEST
Multiple Choice
1.
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Which of the following statements about prokaryotes is not true?
a) They probably evolved on Earth before eukaryotes did.
b) Prokaryotes tend to reproduce by binary fission.
c) They do not use ribosomes to synthesize proteins.
d) They do not use a Golgi body to change newly made proteins.
e) Many are species that live in extreme environments.
2.
Which of the following is true?
a) Bacteria cannot perform photosynthesis because they lack chloroplasts.
b) Bacteria cannot provide energy for themselves because they lack
mitochondria.
c) All genetic information in a bacterium is present in a single large chromosome.
d) Bacteria rely on water pressure in their vacuoles to give them shape.
e) Bacteria have the ability to move around using flagella.
3.
Which statement about Archaebacteria is false?
a) Some Archaebacteria can produce methane as a fuel source for humans.
b) There are no useful enzymes from Archaebacteria that can be used in
scientific research.
c) Salt-loving bacteria (halophiles) can be used in cancer research.
d) Halophiles can contain a bright red pigment to protect them from the sun.
e) Archaebacteria can grow in swamps and marshes.
4.
Which of the following statements about E. coli is false?
a) Those in our intestines help us digest our food.
b) They synthesize (create) certain vitamins for our nutrition.
c) They lack peptidoglycan in their cell walls, making them Gram-negative.
d) They can grow with or without oxygen.
e) They always use a sex pilus during reproduction.
1
SBI3C
5.
Microbiology Unit
Name: __________________
Date: ___________________
Which of the following statements about viral reproduction is false?
a) Viral information can lay dormant in cells for years.
b) Viruses that enter lysogenic cycles have the potential to cause cancer.
c) A dormant virus may rely on an environmental trigger to re-stimulate the
replication process.
d) Once new viruses are assembled inside a host cell, they wait for a signal
before rupturing the cell membrane.
e) An entire lytic cycle can occur within twenty to twenty-five minutes.
6.
Which activity can best be linked to saprophytes?
a) Releasing nitrogen compounds into the soil by breaking down dead leaves.
b) An alga forms sugars using light energy.
c) The ability to form organic nitrogen compounds directly from the air.
d) The production of antibiotics to kill invading species.
e) Using up oxygen in an under-water environment.
7.
The process of using bacteria to break down environmental contaminants is
referred to as:
a) Bioremediation
b) Fermentation
c) Conjugation
d) Integrated Pest Management
e) Commensalism
8.
Which of the following statements about algae is false?
a) Algae can be a nutritious source of food for humans.
b) Agar, derived from algae, has many applications to the drug and cosmetics
industries.
c) Green algae carry out photosynthesis near the surface of bodies of water.
d) Excessive growth of algae in a lake can negatively impact other life forms.
e) Algae cannot be found on land.
9.
Which of the following is true about plasmodium (the cause of malaria)?
a) They travel around using their flagella.
b) Its spores like to invade white blood cells.
c) The most effective way to deal with malaria in developing countries is to use
expensive drugs.
d) Female Anopheles mosquitoes are the vectors for the organisms.
e) The goal of current research is to develop better chemical pesticides.
2
SBI3C
10.
Microbiology Unit
Name: __________________
Date: ___________________
Why is amoebic dysentery so easily spread among humans?
a) The parasitic organisms form cysts, which can survive for long periods of time
in human waste.
b) They have developed resistance to most drugs.
c) They gain new genetic information by conjugating with other amoebae.
d) Their spread is not affected by sanitary disposal of human waste.
e) They are able to become airborne.
11.
Which of the following statements about fungi is false?
a) Yeast cells are single-celled fungi.
b) The non-sexual parts of a multicellular fungus are a mesh of filaments called a
mycelium.
c) The mycelium is made up of filaments called hyphae.
d) Fungi absorb food whole before digesting it to obtain nutrients.
e) Fungal cell walls are made up of chitin.
12.
With regard to fungal reproduction:
a) Fungal spores are usually carried by honey bees.
b) Fungi produce haploid spores as reproductive cells.
c) Compatible haploid parent hyphae fuse far above ground to start sexual
reproduction.
d) After parent hyphae fuse, the spores produced are always dikaryotic.
e) Less than two hundred total spores can be produced from an average field
mushroom.
13.
An example of mutualism is:
a) Mycorrhizae of plants and fungi.
b) Streptococcus producing lactic acid by feeding in your mouth.
c) Corynebacterium living on the surface of the human eye.
d) Hook worm in human intestines.
e) Bacteriophage on a bacterium.
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SBI3C
Microbiology Unit
Name: __________________
Date: ___________________
Short Answer Questions
1.
State three similarities and three differences between
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a) plants and fungi
or
b) prokaryotes and eukaryotes.
Similarities
2.
Explain the difference between
Differences
/2
a) a vector for a disease, and a carrier for a disease
or
b) an endospore, and a cyst.
4
SBI3C
3.
Microbiology Unit
Pick one of the categories of microorganisms (viruses, bacteria, protists, fungi),
and explain, with examples, how some members of the group are helpful to
humans, while other members can be harmful to humans.
/4
Labelling
1.
Name: __________________
Date: ___________________
/10
On the attached sheet, place the following labels into the correct location,
Numbers 1, 2, 3, 4, 5, 6:
Virus detects host cell, and attaches to it
Lysogenic Cycle
Viral DNA inserted into host DNA
Viruses are assembled, and break through cell
Lytic Cycle
Viral DNA copied, and passed on to daughter cells
2.
On the attached sheet, indicate, for each of the two images, what type of
microorganism is involved, and what process is occurring
.
Choices:
Fungi
Bacteria
Protists
Lifecycle of pathogenic protist
Asexual reproduction by conjugation
Asexual spore production
Sexual spore production
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