2. 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.
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
Test3
VIRUSES, BACTERIAAND FUNGI
4. Question 1
Which of the following are characteristics of a virus?
(a) Respiration
(b) Growth
(c) Excretion
(d) Reproduction
Question 2
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
5. Viruses do not respire
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
6. Viruses do not grow but they do reassemble themselves in the
host’s cell
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
7. Viruses do not excrete
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
8. 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
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
9. Question 2
Viruses can reproduce only…
(a) at certain temperatures
(b) inside a living cell
(c) in dry conditions
(d) inside bacteria
Question 3
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
10. Reproduction of viruses is not dependent on temperature.
They will produce at any temperature which does not
damage their host’s cells
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
11. Yes
Viruses can reproduce only in the cells of their
host organism
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
12. Unless the host is harmed by dry conditions, the virus
reproduces in the cytoplasm of the host’s cells
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
13. There are certain viruses, called bacteriophages, which
reproduce inside bacteria but this does not apply to all viruses
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
14. Question 3
Which of the following diseases is caused by a virus?
(a) Influenza
(b) Tuberculosis
(c) Syphilis
(d) Sore throat
Question 4
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
15. Yes
Influenza (‘flu’) is caused by a virus
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
16. Tuberculosis is caused by a bacterium, Mycobacterium
tuberculosis
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
17. Syphilis is caused by a spirochaete bacterium, Treponema
pallidum
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
18. Sore throat is caused by a Streptococcus bacterium.
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
19. 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
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
20. A bacterial cell does have a cell wall but, unlike a plant cell
wall, it does not contain cellulose
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
21. Yes
A bacterial cell has no central vacuole
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
22. Yes
A bacterial cell has no nuclear membrane
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
23. A bacterial cell does have cytoplasm
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
24. Question 5
Most bacteria can be killed by …
(a) cooking
(b) refrigeration
(c) freezing
(d) canning
Question 6
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
25. 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
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
26. Refrigeration at 4oC does not kill bacteria but slows down
their rate of reproduction so that the food remains safe for
longer periods
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
27. Freezing at about minus 18oC stops bacteria from reproducing
but does not kill them
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
28. Yes
Food is canned at high temperatures and
pressures to kill bacteria
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
29. Question 6
Which of the following is a bacterium?
(a) Penicillium notatum
(b) Candida albicans
(c) Plasmodium vivax
(d) Salmonella typhimurium
Question 7
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
30. Penicillium notatum is a mould fungus. It grows on decaying
fruit and other organic matter and is the source of the
antibiotic, Penicillin
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
31. Candida albicans is a yeast-like fungus. It causes a disease
called ‘thrush’
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
32. Plasmodium vivax is a protozoan parasite which causes
malaria
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
33. Yes
Salmonella typhimurium is a bacterium
which causes one form of food poisoning
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
34. Question 7
Which of the following diseases is caused by bacteria?
(a) Tinea
(b) The common cold
(c) Typhoid fever
(d) Diabetes
Question 8
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
35. 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
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
36. The common cold is caused by a virus, (a ‘rhinovirus’).
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
37. Yes
Typhoid fever is caused by a
bacterium, Salmonella typhi.
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
38. 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
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
39. Question 8
A fungus is made up of …
(a) hyphae
(b) cells
(c) cytoplasm
(d) chitin
Question 9
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
40. Yes
Hyphae are the living, thread-like
structures which form a fungus
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
41. 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
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
42. A fungus is made up of hyphae which do contain cytoplasm,
but the fungus is not made solely of cytoplasm
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
43. Chitin is a component of the hyphal wall but the fungus is
not made up of chitin
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
44. Question 9
The drawing represents a
mushroom partly in section.
Which of the following
structures represents the
mycelium?
A
BC
D
soil level(a) A
(b) B
(c) C
(d) D
Question 10
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
45. This is the ‘cap’ of the mushroom
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
46. These are the ‘gills’ of the mushroom. They carry the spores.
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
47. This is the mushroom’s ‘stalk’
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
48. Yes
This network of hyphae constitutes a ‘mycelium’
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
49. 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
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
50. Fungi do not produce seeds
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
51. Fungi do have methods of sexual reproduction but they do
not result in the production of large numbers of offspring
No
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
52. 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
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
53. 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.
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA
54. End of questions
Back to start
End show
RENU EDUCATIONALGROUP
RENU EDUCATIONAL GROUP BY VIJAY K VERMA