quiz no. 4
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by:- vijay k verma RENU EDUCATIONAL GROUPTRANSCRIPT
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Present
INTERACTIVE
MULTIPLE CHOICE
QUESTIONS
These multiple choice questions in some cases,
there may be more than one acceptable answer.
For this reason, even if you select a correct
answer at your first attempt, it is worth looking
at all the alternatives (a) to see if there is a
better answer and (b)
to see why some of the alternatives are
unacceptable.
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Test3
VIRUSES, BACTERIA AND FUNGI
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Hi
I am BETTY. Your quiz instructor.
I ask you some question OK.
R U Ready
QUESTION 1
Question 1
Which of the following are characteristics of a virus?
(a) Respiration
(b) Growth
(c) Excretion
(d) Reproduction
Question 2
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Viruses do not grow but they do reassemble themselves in the
host’s cell
No
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Yes
Viruses do reproduce inside the host’s cell.
Their DNA (or RNA) replicates and they
assemble new protein coats using the host’s
resources
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Question 2
Viruses can reproduce only…
(a) at certain temperatures
(b) inside a living cell
(c) in dry conditions
(d) inside bacteria
Question 3
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Reproduction of viruses is not dependent on temperature.
They will produce at any temperature which does not
damage their host’s cells
No
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Yes
Viruses can reproduce only in the cells of their
host organism
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Unless the host is harmed by dry conditions, the virus
reproduces in the cytoplasm of the host’s cells
No
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There are certain viruses, called bacteriophages, which
reproduce inside bacteria but this does not apply to all viruses
No
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Question 3
Which of the following diseases is caused by a virus?
(a) Influenza
(b) Tuberculosis
(c) Syphilis
(d) Sore throat
Question 4
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Yes
Influenza (‘flu’) is caused by a virus
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Tuberculosis is caused by a bacterium, Mycobacterium
tuberculosis
No
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Syphilis is caused by a spirochaete bacterium, Treponema
pallidum
No
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Sore throat is caused by a Streptococcus bacterium.
No
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Question 4
A bacterial cell differs from a plant cell by having …
(a) no cell wall
(b) no central vacuole
(c) no nuclear membrane
(d) no cytoplasm
Question 5
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A bacterial cell does have a cell wall but, unlike a plant cell
wall, it does not contain cellulose
No
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Yes
A bacterial cell has no central vacuole
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Yes
A bacterial cell has no nuclear membrane
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A bacterial cell does have cytoplasm
No
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Question 5
Most bacteria can be killed by …
(a) cooking
(b) refrigeration
(c) freezing
(d) canning
Question 6
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Yes (within limits)
If the temperature is high enough and the
cooking reasonably prolonged, the majority of
bacteria will be killed.There will probably be
a residual population of bacteria but not in
sufficient numbers to cause disease.
However, if the cooked food is left at room
temperature, this small population will
multiply rapidly
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Refrigeration at 4oC does not kill bacteria but slows down
their rate of reproduction so that the food remains safe for
longer periods
No
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Freezing at about minus 18oC stops bacteria from reproducing
but does not kill them
No
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Yes
Food is canned at high temperatures and
pressures to kill bacteria
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Question 6
Which of the following is a bacterium?
(a) Penicillium notatum
(b) Candida albicans
(c) Plasmodium vivax
(d) Salmonella typhimurium
Question 7
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Penicillium notatum is a mould fungus. It grows on decaying
fruit and other organic matter and is the source of the
antibiotic, Penicillin
No
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Candida albicans is a yeast-like fungus. It causes a disease
called ‘thrush’
No
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Plasmodium vivax is a protozoan parasite which causes
malaria
No
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Yes
Salmonella typhimurium is a bacterium
which causes one form of food poisoning
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Question 7
Which of the following diseases is caused by bacteria?
(a) Tinea
(b) The common cold
(c) Typhoid fever
(d) Diabetes
Question 8
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Tinea is a skin infection caused by one of a number of fungal
parasites which cause inflammation between the toes (‘athletes’
foot’), on the scalp or in the pubic region
No
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The common cold is caused by a virus, (a ‘rhinovirus’).
No
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Yes
Typhoid fever is caused by a
bacterium, Salmonella typhi.
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Diabetes is not an infectious disease. It arises as a result of
either (a) a failure of the pancreas to produce sufficient insulin
or (b) an inability of the body to use insulin effectively
No
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Question 8
A fungus is made up of …
(a) hyphae
(b) cells
(c) cytoplasm
(d) chitin
Question 9
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Yes
Hyphae are the living, thread-like
structures which form a fungus
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Fungi are made up of hyphae which have a wall, cytoplasm
and nuclei like plant cells but are in the form of long threads
No
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A fungus is made up of hyphae which do contain cytoplasm,
but the fungus is not made solely of cytoplasm
No
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Chitin is a component of the hyphal wall but the fungus is
not made up of chitin
No
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Question 9 The drawing represents a
mushroom partly in section.
Which of the following
structures represents the
mycelium?
A
B C
D
soil level (a) A
(b) B
(c) C
(d) D
Question 10
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These are the ‘gills’ of the mushroom. They carry the spores.
No
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Yes
This network of hyphae constitutes a ‘mycelium’
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Question 10
Fungi have the potential to produce large numbers of
offspring by ...
(a) producing many seeds
(b) sexual reproduction
(c) producing fruits
(d) producing many spores
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Fungi do have methods of sexual reproduction but they do
not result in the production of large numbers of offspring
No
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No
Mushrooms, toadstools and bracket fungi are sometimes
called the ‘fruiting bodies’ of the fungus but this is a
misleading term. These structures produce spores.
No
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Yes
Fungi produce a huge number of single-
celled, microscopic spores. Each one can
produce a mycelium if it lands in a
suitable place, but only a tiny minority
succeed.
The giant puffball produces trillions of
spores which appear as a brown dust
cloud if you tread on it.
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