MICRO ORGANISMS
FRIENDS AND FOE
MICRO ORGANISMS FRIENDS AND FOE
1.Causative agent of TB
(A) Salmonella (B) Streptococcus
(C) Mycobacterium (D) Pneumonia
ANS : C
2. Who discovered the small pox vaccine?
(A) Louis Pasteur (B) Edward Jenner
(C) Alexander Flemming
(D) Anton
von Leeuwenhoek
ANS : B
3. Cod liver oil is source of
(A) Vitamin B (B) Vitamin A
(C) Vitamin C (D) Iodine
ANS : B
4. Carrier of malaria causing protozoan is
(A) Housefly (B) Cockroach
(C) Female Anopheles mosquito (D) Rat
ANS : C
5. Yeast is used in the production of
(A) Sugar (B) Alcohol
(C) Hydrochloric acid (D) Oxygen
ANS : B
6. Which of these diseases is caused by a
virus?
(A) AIDS (B) Smut
(C) Malaria (D) Tuberculosis
ANS : A
7. Salting helps in
the preservation of food by
(A) Increasing the acidity (B) Increasing the water content
(C) Extracting the water from the cells (D) Lowering
its temperature
ANS : C
8. Which of the
following is a chemical preservative?
(A) Streptomycin (B) Alcohol
(C) Sodium benzoate (D) Penicillin
ANS ; C
9. AIDS is caused by
(A) HIV virus (B) Coccus
(C) FMDV (D) Rhinovirus
ANS : A
10. The disease caused
by Protozoa is
(A) Measles (B) Typhoid
(C) Amoebic dysentery (D) Chicken pox
ANS : C
11. Curd is set by the
action of
(A) Lactobacillus
(B) Staphylococcus
(C) Salmonella
(D) Mycobacterium
ANS : A
12. The rod shaped
bacteria are called
(A) Bacillus (B) Coccus
(C) Vibrio (D) Spirillum
ANS : A
13. The scientist
known as "Father of Bacteriology' is
(A) Robert Hooke (B) Louis Pasteur
(C) Edward Jenner (D) Robert Koch
ANS : B
14. The disease caused
by protozoa is
(A) Measles (B) Malaria
(C) Cholera (D) Tetanus
ANS : B
15. Which of the
following can synthesize its food?
(A) Euglena (B) Hydra
(C) Anopheles
(D) Paramecium
ANS : A
16. Final product of
starch digestion is
(A) Glucose (B) Maltose
(C) Amylose (D) Galactose
ANS : B
17. Cocci
are______________ shaped bacteria
(A) Rod (B) Round
(C) Spiral (D) Comma
ANS : B
18. Food poisoning is
caused by a
(A) Fungi (B) Algae
(C) Virus (D) Amoeba
ANS : A
19. Nitrogen in soil
is mainly fixed by
(A) Fungi (B) Bacteria
(C) Protozoa (D) All of these
ANS : B
20. Which of the
following is a viral disease?
(A) Dengue (B) Malaria
(C) Dysentry (D) Rust disease
ANS : A
21. Antibiotics are
mainly produced by
(A) Bacteria and Fungi (B) Virus and Fungi
(C) Protozoa and Bacteria (D) Fungi and Algae
ANS : A
22. Preservation of
food can be done by
(A) Freezing (B) Canning
(C) Adding salt and sugar (D) All of these
ANS : D
23. The virus that
infect bacteria is
(A) Bacteriophage (B) HIV
(C) Ebola (D) Rubella
ANS : A
24. The vaccine for
smallpox was discovered by
(A) Robert Koch (B) Alexander Fleming
(C) Robert Brown (D) Edward Jenner
ANS : D
25. Pasteurization is
(A) to heat milk at high temperature (B) to
cool milk at low temperature
(C) to heat and suddenly cool (D) to freeze at 0°C
ANS : C
26. Moulds are belongs
to
(A) fungi (B) protozoa
(C) bacteria (D) virus
ANS : A
27. Vector means
(A) transmitter of disease (B) suffering from disease
(C) carrier of disease (D) both (A) and (B)
ANS : A
28. Bacteria
responsible for food poisoning are
(A) Mycobacterium
(B) Bacillus
(C) Clostridium
(D) Lactobacillus
ANS : C
29. The disease which
can be prevented by vaccination of children at proper age are
(A) Polio (B) Tuberculosis
(C) AIDS (D) Both 1 & 2
ANS : D
30. Chickenpox is
caused by
(A) Virus (B) Fungi
(C) Protozoa (D) Bacteria
ANS : A
31. Bacteria are
(A) Single celled organisms. (B) Larger than viruses
(C) Smaller than Viruses (D) Both (a) and (b)
ANS : D
32. Which of the
following is a unicellular fungus?
(A) Aspergillus
(B) Yeast
(C) Penicillium
(D) Mushroom.
ANS : B
33. Spirogyra is
(A) An algae (B) Fungus
(C) Protozoa (D) Bacterium
ANS : A
34. Amoeba, Paramecium and Plasmodium are
(A) Algae (B) Fungi
(C) Protozoa (D) Bacterium
ANS : C
35. Which of the
following statements is true about viruses?
(A) They cannot multiply by their own.
(B) They do not show any characteristic of living
things outside a host cell.
(C) They do not feed respire, grow or multiply.
(D) All of them are correct.
ANS : D
36. Yeast is used in
the production of
(A) Bread, cakes and pastries. (B) Idlies and dosas
(C) Alcohol, wine and beer (D) All of them
ANS : D
37. Which of the
following fixes nitrogen in the soil?
(A) Aspergillus
(B) Azotobacter
(C) Blue green algae (D) Both 2 & 3
ANS : C
38. Which of the
following gas is produced by anaerobic bacteria during the treatment of sewage?
(A) Methane (B) Carbon dioxide
(C) Sulfur dioxide (D) Oxygen
ANS : D
39. The first
discovered antibiotic was
(A) Streptomycin (B) Tetracycline
(C) Penicillin (D) Neomycin
ANS : C
40. Lactobacillus is a
(A) Protozoan (B) Bacteria
(C) Fungus (D) Viruses
ANS : B
41. The yeast multiply
by a process called
(A) Binary fission (B) Budding
(C) Spore formation (D) none of the above
ANS : B
42. The example of
protozoan is
(A) Penicillium
(B) Blue green algae
(C) Amoeba (D) Bacillus
ANS : C
43. The most common
carrier of communicable diseases is
(A) Ant (B) Housefly
(C) Dragonfly (D) Spider
ANS : B
44. The following is
an antibiotic
(A) Alcohol (B) Yeast
(C) Sodium bicarbonate (D) Streptomycin
ANS : D
45. Yeast produces
alcohol and carbon dioxide by a process called
(A) Evaporation (B) Respiration
(C) Fermentation (D) Digestion
ANS : C
46. The algae commonly
used as fertilizers are called
(A) Staphylococcus
(B) Diatoms
(C) Blue green algae (D) none of the above
ANS : C
47. Cholera is caused
by
(A) Bacteria (B) Virus
(C) Protozoa (D) Fungi
ANS : A
48. Plant disease
citrus canker is caused by
(A) Virus (B) Fungi
(C) Bacteria (D) None of these
ANS : C
49. The bread dough
rises because of
(A) Kneading (B) Heat
(C) Grinding (D) Growth of yeast cells
ANS : D
50. Mycoplasma,
rickettsiae, and chlamydiae are
(A) Type of fungi (B) small bacteria
(C) Species of protozoa (D) forms of viruses
ANS : B
51. Pasteurization means -
(A)
Vaccination for a baby against smallpox.
(B)
Sterilization in steam cooker at 100° C.
(C) Heating
milk or other liquids to 60°C to 70°C for short duration.
(D) A
technique or curing people bitten by mad dogs.
ANS : C
52. Bacteria differ from other plants in that they do not have.
(A) DNA (B) RNA
(C) Cell wall (D) Awell defined nucleus
ANS : D
53. Who proposed the germ theory of disease?
(A) Robert
Koch (B) A.Fleming (C) E. Jenner (D) Louis Pasteur
ANS : D
54. Comma shaped bacteria are termed as -
(A) Bacilli (B) Cocei (C) Spirilla (D)
Vibrio
ANS : D
55. Food spoilage can be prevented by -
(A) Healing of
food (B)
Using chemicals (C) Canning (D) All of these
ANS : D
56. Yeast is used in the production of
(A) Sugar (B) Alcohol (C) Hydrochloric acid (D) Oxygen
ANS : B
57. The fixation of free nitrogen by bacteria in the soil is done by-
(A) Azotobacter (B) Nitrosomonas (C) Nitrobacter (D) Thiobacillus
ANS : A
58. Nitrifying bacteria convert the-
(A) Nitrates
into nitrites (B)
Ammonium salts into nitrates
(C) Ammonium
salts into amino acids. (D)
All of the above
ANS : B
59. The bacterial genome is called :
(A) Nucleus (B) Nucleolus (C) Nucleoid (D) None
ANS : C
60. Antibiotics are mostly obtained from-
(A) Bacteria (B) Viruses (C) Angiosperms (D)
Fungi
ANS : A
61. Nitrates are converted into nitrogen by-
(A)
Denitrifying bacteria (B)
Nitrifying bacteria
(C)
Ammonifying bacteria (D)
Nitrogen fixing bacteria
ANS : A
62. All bacteria have the following organelle.
(A) Mesosomes (B) Golgibodies (C) Mitochondria (D)
Chloroplast
ANS : A
63. Rounded bacteria are-
(A) Bacilli (B) Vibrio (C) Spirilla (D) Cocci
ANS : D
64. The following is an antibiotic
(A) Sodium
bicarbonate (B) Streptomycin
(C) Alcohol (D)
Yeast
ANS : B
65. Virus possess-
(A) DNA only (B)
Nucleic acid, DNA or RNA
(C) Protein
only (D)
Nucleic acid and protein
ANS : B
66. Capsid is-
(A)
Genetic material of virus (B)
Protein cover of virus
(C)
Extra genetic material of bacterium (D)
Genome of bacterium
ANS :
B
67. Carrier of malaria-causing protozoan is
(A)
Female Anopheles mosquito (B)
Cockroach
(C)
Housefly (D)
Butterfly
ANS : D
68. Who discovered vaccination against small pox.
(A)
Jenner (B) Pasteur (C) Lister (D) Mayer
ANS : A
69. Bacteriophage is-
(A)
Virus attacking bacteria (B)
Virus attacking virus
(C)
Bacterium attacking virus (D)
Stage in bacterial life cycle
ANS : C
70. The most common carrier of communicable diseases is –
(A)
Ant (B) Housefly (C) Dragonfly (D) Spider
ANS : B
71. Thread like fungal structure are-
(A)
Hyphae (B) Mycelium (C) Rhizomorphs (D) Sclerotia
ANS : A
72. Fungal cell wall is composed of-
(A)
Chitin (B) Hemicellulose (C) Cellulose (D)
None of these
ANS : A
73. Fleming discovered penicillin from-
(A)
Penicillium notatum (B)Penicillium
roqueforti
(C)
Penicillium camemberti (D)
Penicillium chrysogenum
ANS : A
74. Yeast are economically important because they-
(A)
Spread plant diseases (B)
Spread animal diseases
(C)
Are used in tea and tobacco industry (D)
Are used in wine and baking industry
ANS : D
75. The bread or idli dough rises because of –
(A)
Heat (B) Grinding (C) Growth of yeast cells (D)
Kneading
ANS : C
76. Botulism is caused by :-
(A)
Salmonella typhae (B)
Clostridium botulinum
(C) Crasticium
botulinum (D)
Staphylococci
ANS :
B
77. Bacterial infection of food can be
prevented by :-
(A)
covering the food (B)
keeping the food very cold
(C)
heating the food upto 70°C at least (D)
Both (A) and (C)
ANS :
D
78. Elephantiasis is caused by :-
(A)
Anopheles mosquito (B)
Culex mosquito
(C)
tsetse fly (D)
Plasmodium
ANS : B
79. Bacteria bearing flagella all over body
are-
(A)
Peritrichous (B)
Atrichous
(C)
Monotrichous (D)
Cephalotrichous
ANS : A
80. BCG stands for :
(A)
Bacillus carol gram (B)
Bacillus Chalmette Guerin
(C) Bacteria Chalmette Guerin (D) None of the above
ANS :
B
81. DPT Vaccine is for :
(A)
Diptheria, Polio, Tetanus (B)
Diptheria, Pertussis, Tetanus
(C) Diptheria, Pertussis, Typhoid (D) Diptheria, Pertussis, Tuberculosis
ANS : B
82. MMR
vaccine is given for :
(A)
Malaria, Mumps, Rubeolla (B)
Mumps, Measles, Rabies
(C)
Mumps, Measles, Rubeolla (D)
None of the above
ANS : C
83. Ring
worm spreads through :
(A)
Contaminated food and water (B)
Direct skin contact
(C)
Insects (D)
Contaminated air
ANS :
B
84. World
TB day is celebrated on :
(A)
March 21 (B)
March 24
(C)
March 30 (D)
March 18
ANS ; B
85. Who
discovered antibiotic streptomycin effective against Tuberculosis :-
(A)
Selman A. Waksman (B)
Louis Pasteur
(C)
Robert Koch (D) Iwanowsky
ANS : A
86. In
Blue green algae, the structure specialised for nitrogen fixation is
(A)
Thylakoid (B)
Harmogonia
(C)
Heterocyst (D)
Endospore
ANS :
C
87. The similarity between bacterium and
cyanobacterium is in the presence of
(A)
Flagella (B)
Nucleoid
(C)
Size (D) 80S ribosomes
ANS :
B
88. Rocky mountain spotted fever is caused
by
(A)
Rickettsias (B)
Fungi
(C) Bacteria (D) PPLO
ANS : A
89. Mycoplasma differ from bacteria in
(A)
Not having a cell wall (B)
Having organised nucleus
(C) Having organised cell
organelles (D) None of the above
ANS : A
90. Escherichia coli in human intestine synthesises
(A)
Vitamin B and D (B)
Vitamin B and C
(C)
Vitamin A and K
(D) Vitamin B and K
ANS :
B
91. The smallest bacterium is
(A)
Spirochaete (B) Dialister
pneumosintes
(C)
Vibrio (D) Lactobacillus
ANS :
D
92. Bacteria having a tuft of flagella at
one end are called-
(A)
Peritrichous (B)
Monotrichous
(C)
Lophotrichous (D)
Amphitrichous
ANS : C
93. Saccharomyces cerevisiae is
(A)
Baker's yeast (B) Beer
yeast
(C)
Both a and b (D) Wine
yeast
ANS : C
94.
Yeast contains maximum amount
of
(A)
Vitamin C (B)
Riboflavin
(C)
Protein (D)
Carbohydrate
ANS : B
95. Contractile vacuole of Amoeba is
analogous to
(A)
Kidneys (B)
Gastrovascular cavity of hydra
(C)
Sweat glands (D)
None of tha above
ANS : A
96. Viruses are
(A)
Complete saprophytes (B)
Partial saprophytes
(C)
Complete parasites (D)
Partial Parasites.
ANS : A
97. Protein
coat of virus is called
(A) Capsomeres (B) Capsid
(C)
Peplos
(D) Nucleoid
ANS :
B
98. Cell organelles that resemble viruses in
chemical nature are
(A)
Mitochondria (B) Ribosomes
(C) Plastids (D) Golgi complex
ANS : B
99. Virus possessing only proteins are
called:
(A)
Viroids (B) Prions
(C)
Virons (D) None of the
above
ANS : B
100. Identify the organism that can photosynthesis
but lack the cell wall.
(A)
(B)
(C)
(D)
ANS :
A
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