11th class (FSc) Biology Unit 6 MCQs
Chapter 6 MCQs 11th Class Biology
Kingdom Prokaryotae:
1. “Germ theory of disease” was formulated by:
a. Edward
b. Robert Koch
c. Christian Gram
d. Louis Pasteur
2. Germ theory of disease was formulated by:
a. Edward Jenner
b. Robert Koch
c. Christian Gram
d. Louis Pasteur
3. Leeuwenhoek used a simple microscope to describe bacteria and protozoa and called these small creatures as:
a. Beastcules
b. Micro animals
c. Micromonsters
d. Animalcules
4. Which of the following is not found in bacterial cell?
a. A nucleoid
b. Cell membrane
c. Capsule
d. Ribosomes
5. The major locomotory structure in bacteria are:
a. Cilia
b. Flagella
c. Pili
d. Fimbriae
6. Which of the following is primarily bacterial cell wall function?
a. Adhesion
b. Transport
c. Support
d. Motility
7. Which of the following is present in both gram-positive and gram-negative cell walls?
a. Techoic acid
b. An outer membrane
c. Lipopolysaccharide
d. Peptidoglycan
8. Mesosomes are internal extension of the
a. Chromatin body
b. Cell wall
c. Capsule
d. Cell membrane
9. Bacterial endospores function in
a. Survival
b. Reproduction
c. Storage
d. Protein synthesis
10. Cell wall of archaeobacteria do not contain:
a. Chitin
b. Peptidoglycan
c. Cutin
d. Cellulose
11. Cell wall is absent in:
a. Vibrio
b. E.-Goli
c. Spirochete
d. Mycoplasma
12. Primary function of flagella in to help in:
a. Running
b. Walking
c. Rest
d. Motility
13. A tetrad is a square of :
a. 6 cocci
b. 2 cocci
c. 8 cocci
d. 4 cocci
14. Which one of the following is a microaerophilic bacterium?
a. Spirochete
b. Compylobacter
c. E.coli
d. Pseudomonas
15. Some bacteria break down the proteins of dead plants and animals and release:
a. Nitrates
b. Sulophates
c. Carbonates
d. Phosphates
16. A square of cocci is termed as:
a. Diplococcus
b. Tetrad
c. Streptococcus
d. Sacrina
17. Curved or comma shaped bacteria are called:
a. Spirochetes
b. Vibrio
c. Bacilli
d. Spirillum
18. Which one of the following requires low concentration of oxygen?
a. Pseudomonas
b. E.coli
c. Compylobacter
d. Spirochete
19. Conjuction in bacteria promoted by:
a. Cilia
b. Flagella
c. gametes
d. Pili
20. Bacteria increase in number by asexual mean of production:
a. Regeneration
b. Binary fission
c. Multiple fission
d. Budding
21. When tuft of flagella is present at each pole of two in bacteria is known as:
a. Pertrichous
b. Atrichous
c. Amphitrichous
d. Lophotrichous
22. If tuft of flagella is present only at one pole of bacteria then these are called as :
a. Amphitrichous
b. Monotrichous
c. Lophotrichous
d. Peritrichous
23. A bacteria with single polar flagellum is called:
a. Lophotrichous
b. Atrichous
c. Amphitrichous
d. Monotrichous
24. Pili are made up of special protein called:
a. Tubulin
b. Pillin
c. Myosin
d. Flagellin
25. Primary involved in conjugation between bacterial cell:
a. Capsule
b. Flagella
c. Pili
d. Slime
26. Bacterial arrangement in having division in random planes is:
a. Sarcina
b. Staphylococcus
c. Tetrad
d. Streptococcus
27. The dormant , thick walled, desiccation resistant forms in bacteria are:
a. Plasmid
b. Spore
c. Nucleoid
d. Cyst
28. Bacterial flagella originate from:
a. Capsule
b. Cell wall
c. Slime
d. Basal body
29. Bacterial pathogenicity is due to:
a. Slime
b. Cell wall
c. Cell envelope
d. Capsule
30. Peptidoglycans are absent in:
a. Archaeobacteria
b. Eubacteria
c. Gramne gative
d. Cyanobacteria
31. Some bacteria exchange genetic bacterial from a donor to a recipient during a process called:
a. Linkage
b. Crossing over
c. Conjugation
d. None
32. The cell wall of most bacteria have a unique macromolecule composed of long glycan chain cross-linked with peptide fragments called as:
a. Chitin
b. Cellulose
c. Lipoproteins
d. Peptidoglycan
33. Mesosomes are invagination of:
a. Nuclear membrane
b. Cell wall
c. Tonoplast
d. Cell membrane
34. Pili are primary involved in a mating process between cells called:
a. Transformation
b. Conjugation
c. Binary fission
d. Translocation
35. Which of the following do not possess cell wall?
a. Vibrio
b. E.coli
c. Yeast
d. Mycoplasma
36. bacteria are micoaerophilic like:
a. E.coli
b. Pseudomonas
c. Spirotchete
d. Campylobacter
37. Bacteria without any flagella are called:
a. Monotrichous
b. Flagellate
c. Amphitrichous
d. Atrichous
38. Peptidoglycan is absent in :
a. Spirochete
b. Pseudomonas
c. Campylobacter
d. E.coli
39. Sarcina is a cube of :
a. 4 cocci
b. 6 cocci
c. 4 cocci
d. 8 cocci
40. Bacterial cell membrane also contain enzyme for:
a. Photosynthesis
b. Respiration
c. Both A & B
d. None
41. Important vectors in modern genetic engineering techniques are:
a. Plasmids
b. Mesosomes
c. Nucleoid
d. Ribosomes
42. Rod shaped bacteria are called:
a. Spirilla
b. Cocci
c. Vibrio
d. Bacilli
43. Many bacteria contain an extra nuclear double stranded circular DNA called:
a. Plasmids
b. Cyst
c. Spore
d. Mesosome
44. Photosynthetic prokaryotes lack:
a. Chloroplasts
b. Ribosomes
c. Cell membrane
d. Cytoplasm
45. A cube of eight cocci is termed as:
a. Diplococcus
b. Tetrad
c. Streptococcus
d. Sarcina
46. Extra chromosomal rings of DNA in bacteria are:
a. Mesosome
b. Nucleoid
c. Chromosome
d. Plasmid
47. These are smallest and without cell wall:
a. Spirochete
b. Mycoplasma
c. E-coli
d. Pseudomonas
48. Oval shaped bacteria are:
a. Cocci
b. Spirilla
c. Bacilli
d. Vibrio
49. ……… is an anaerobic bacterium :
a. Spirochete
b. Pseudomonas
c. Campylobacter
d. E.coli
50. E.Coli is an example of :
a. Facultative bacteria
b. Aerobic bacterium
c. Microaerophilic bacteria
d. Anaerobic bacterium
51. Which structure of bacteria help in DNA replication:
a. Nucleoid
b. Plasmid
c. Cyst
d. Mesosomes
52. The bacteria which can grow either in presence or absence of oxygen are called:
a. Microaerophilic bacteria
b. Facultative bacteria
c. Anaerobic bacteria
d. Aerobic bacteria
53. Which of the following are spiral-shaped bacteria:
a. Bacilli
b. Cocci
c. Vibrio
d. Pseudomonas
54. Which is an aerobic bacterium?
a. Campylobacter
b. E.coli
c. Pseudomonas
d. Spirochete
55. Asexual reproduction in bacteria occurs by:
a. Transformation
b. Conjugation
c. Binary fission
d. Transduction
56. The phase of rapid growth in bacteria is:
a. Stationary phase
b. Lag phase
c. Decline phase
d. Log phase
57. The most ancient bacteria are:
a. Archeaobacteria
b. Eubacteria
c. Streptococci
d. Escherichia coli
58. The bacteria that cause disease in human being, are called:
a. Chemosynthetic bacteria
b. Photosynthetic bacteria
c. Pathogenic bacteria
d. Facultative bacteria
59. Bacteria divide at exponential rate during:
a. Log phase
b. Stationary phase
c. Lag phase
d. Decline phase
60. What cocci occur in paris, their arrangement is:
a. Sarcina
b. Tetrad
c. Streptococcus
d. Diplococcus
61. Cysts are dormants, thick-walled desiccation resistant form sand develop during:
a. Differentiation of reproductive cells
b. Late stage of cell growth
c. During conjugation
d. Differentiation of vegetative cells
62. The interval of time until the completion of next division is known as:
a. Reproductive time
b. Interphase
c. Growth
d. Generation time
63. Pili are primarily involved in:
a. Conjugation
b. Parthenogenesis
c. Motility
d. Vaccination
64. Bacteria having a tuft of flagella at one pole is called as:
a. Monotrichous
b. Amphitrichous
c. Peritrichous
d. Lophotrichous
65. Which one of the following is not found in all bacteria?
a. Nucleoid
b. Cell membrane
c. Capsule
d. Ribosome
66. Cell wall of Archaeo bacteria do not contain:
a. Chitin
b. Peptidoglycan
c. Cutin
d. Cellulose
67. Important vector in modern genetic engineering is:
a. Ribosome
b. Nucleoid
c. Plasmid
d. Mesosoma
68. The bacteria which can grow either in the presence or absence of oxygen are called:
a. Microaerophilic bacteria
b. Facultative bacteria
c. Anaerd
d. Aerobic bacteria
69. Rapid phase of growth of bacteria is:
a. Stationary
b. Lag
c. Decline
d. Log
70. Bacteria range in size from about 0.1 to ………. over a single dimension.
a. 700
b. 500
c. 800
d. 600
71. Epulopiscium fishelsoni grows as large as 600 by ……….
a. 90
b. 80
c. 60
d. 70
72. An average coccus is about ………. micrometer (um ) in diameter.
a. 0.5-1.0
b. 0.1-0.5
c. 0.2-0.7
d. 1.0-2.0
73. Example of rod shaped bacteria is:
a. Rhizopus
b. Spirochete
c. Escherichia coli
d. Diplococcus
74. Flagellum is made up of protein:
a. Insulin
b. Flagellin
c. Globin
d. Tubulin
75. Bacteria produce capsule which is made up of repeating………. units, and of protein, or of both;
a. Oligosaccharide
b. Monosaccharide
c. Disaccharide
d. Polysaccharide
76. By Gram staining technique, gram positive bacteria are stained ………. in colour:
a. Purple
b. Yellow
c. Blue
d. Pink
77. The plasma membrane and everything present within is known as:
a. Plasmaplast
b. Protoplast
c. Cytoplast
d. Chloroplast
78. ………. is a micraerophilic bacterium:
a. Pseudomonas
b. Nitrobacteria
c. Campylobacter
d. Spirochete
79. Bacteria increase in number by an asexual means of reproduction called:
a. Regeneration
b. Binary fission
c. Multiple fission
d. Budding
80. The diameter of smallest bacteria is about 100 to:
a. 200 nm
b. 200um
c. 200 cm
d. 200 dm
81. The smallest bacteria are some members of the genus:
a. Closteridum
b. Microcystis
c. Pseudomonas
d. Mycoplasma
82. The smallest bacteria are approximately the size of the largest viruses i.e:
a. Parvoviruses
b. Paramyxoviruses
c. Poxviruses
d. Adenoviruses
83. Some spirochetes occasionally reach in length………
a. 400
b. 200
c. 500
d. 300
84. on the basis of general shape, bacteria are classified into:
a. Four categories
b. Two categories
c. Five categories
d. Three categories
85. The general shapes of bacteria are known as:
a. Cocci, comma and spiral
b. Cocci, bacilli and spiral
c. Cubical, bacilli and spiral
d. Cocci, bacilli and vibrio
86. When cocci occur in pairs than arrangement is:
a. Sarcina
b. Tetrad
c. Streptococci
d. Diplococcus
87. When cocci form long chain of cells then arrangement is called as:
a. Sarcina
b. Tetrad
c. Streptococci
d. Diplococcus
88. When the division of cell is in two planes it will produce a:
a. Tetrad arrangement
b. Sarcina arrangement
c. Helical arrangement
d. Bivalent arrangement
89. A tetrad is a square of:
a. 6 cocci
b. 2 cocci
c. 8 cocci
d. 4 cocci
90. When the division is in three planes it will produce a:
a. Tetrad arrangement
b. Sarcina arrangement
c. Helical
d. Bivalent arrangement
91. When division occurred in random planes it will produce a:
a. Streptococcus arrangement
b. Staphylococcus arrangement
c. Bacillococcus arrangement
d. Diplococcus arrangement
92. In staphylococcus arrangement cocci are arranged in irregular, often:
a. Berry-like clusters
b. Banana-like clusters
c. Cherry-like clusters
d. Grape-like clusters
93. Staphylococci aureus, Diplococci pneumonia etc , are examples of:
a. Cocci
b. Bacilli
c. Spiral
d. None
94. The spiral shaped bacteria are:
a. Cochlearly coiled
b. Helical coiled
c. Spirally coiled
d. Curly coiled
95. Spiral come in the form:
a. Spirochete
b. Vibrio
c. Spirillum
d. All of these
96. A chain of bacilli is called:
a. Staphylobacillus
b. Streptobacillus
c. Tetrad
d. Diplobacillus
97. The condition in which bacteria have a single polar flagellum is called:
a. Lophotrichous
b. Monotrichous
c. Amphtrichous
d. Atrichous
98. When flagella surrounded the whole bacteria cell, the condition is called:
a. Lophotrichous
b. Peritrichous
c. Amphtrichousq
d. Atrichous
99. Primary function of flagella is to help in:
a. Running
b. Walking
c. Rest
d. Motility
100. With the help of flagella, flagellate bacteria can detect and move in response to chemical signals which is a type of behavior called:
a. Chemotaxis
b. Chemotherapeuti
c. Chemosynthetic
d. Both a & b
101. Hollow, nonhelical, filamentous appendages present in bacteria are:
a. Flagella
b. Cilia
c. Pili
d. Legs
102. True pili are present on:
a. Gram positive bacteria
b. Gram negative bacteria
c. Both a & b
d. None
103. In bacteria, some pili function as a mean of:
a. Addition
b. Organization
c. Attachment
d. Accessory
104. Some bacteria are covered with loose, soluble shield of macromolecules which is called as:
a. Sheath
b. Slime capsule
c. Pellicle
d. None
105. Slime provides greater pathogenicity to bacteria and protect them against:
a. Invasion
b. Pinocytosis
c. Phagocytosis
d. Both a & b
106. The cell walls of most bacteria have a unique macromolecule called:
a. Peptidoglycan
b. Teichoic acid
c. Polysaccharide
d. Lipoprotein
107. The intact cell wall also contains chemical constituents such as sugar molecules, teichoic acid, lipoproteins and lipopolysaccharide, which are linked to;
a. Nucleoprotein
b. Glycoprotein
c. Peptidoglycan
d. Glycolipid
108. The cytoplasm of prokaryotic cell lacks membrane bound organelles and:
a. Lipid granules
b. Cytoskeleton
c. Enzymes
d. Ribosomes
109. The nuclear material or DNA in bacteria cells is a single, circular and:
a. Tertiary
b. Single stranded
c. Quaternary
d. Double stranded
110. DNA aggregates as an irregular shaped dense area called:
a. Nucleoid
b. Chromatin body
c. Both a & b
d. Chromatid
111. In addition to chromosomes, many bacteria contain:
a. Plasmids
b. Mitochondria
c. Glyoxisomes
d. Glyoxisomes
112. Spores are resistant to adverse physical environment condition such as:
a. Chemical agents
b. High temperature
c. Desiccation
d. All of these
113. Dormant, thick-walled, desiccation resistant forms present in bacteria are:
a. Endospores
b. Cysts
c. Both A & B
d. Exospores
114. Bacteria that cannot synthesize their organic compounds from simple inorganic substances are:
a. Symbionts
b. Symbionts
c. Lichen
d. Heterotrophs
115. A material obtained by the partial decay of plants and animals is:
a. Sterols
b. Hunch
c. Murein
d. Humus
116. Parasitic bacteria are fully dependent on their host for their:
a. Nutrition
b. Respiration
c. Growth
d. Excretion
117. Bacteria that can synthesize organic compounds from simple inorganic substances are known as:
a. Symbionts
b. Autotrophs
c. Lichen
d. Heterotrophs
118. On the basis of energy source, autotrophic bacteria can be divided into:
a. Chemosynthetic
b. Photosynthetic
c. Both A & B
d. Saprophytic
119. Photosynthetic bacteria possess chlorophyll which differ from the chlorophyll of:
a. Blue green plants
b. Yellow plants
c. Purple plants
d. Green plants
120. Chemosynthetic bacteria oxidize inorganic compounds like:
a. Sulphur
b. Ammonia
c. Nitrate
d. All of these
121. Bacteria which can grow in the absence of oxygen are known as:
a. Obligate
b. Anaerobic
c. Facultative
d. Aerobic
122. Some bacteria are neither aerobic nor anaerobic but:
a. Symbiont
b. Obligate
c. Commensal
d. Facultative
123. Facultative bacteria grow either in the presence or absence of:
a. Hydrogen
b. Carbon
c. Oxygen
d. Nitrogen
124. Some conjugating bacteria use specialized sex pili to transfer:
a. Food
b. Genetic material
c. Water
d. Information
125. Chemical substance used on living tissues that inhibit the growth of microorganisms are called:
a. Chemotherapeutic agents
b. Disinfectants
c. Antibiotics
d. Antiseptics
126. Chemical produced by microorganisms which are capable of destroying the growth of microbes are called
a. Antiseptics
b. Anitgens
c. Antibiotics
d. Both A & C
127. ………. are the procedures to eliminate or reduce the possibility of infection.
a. Antibiotics
b. Antiseptics
c. Antidote
d. Antisepsis
128. Bacteria decompose:
a. Organic matter
b. Inorganic matter
c. Both A & B
d. None of these
129. Bacteria play a significant role the completion of cycle of:
a. Sulphur and carbon
b. Nitrogen
c. Phosphorus
d. All of these
130. Bacteria are used in number of industries, including:
a. Biotechnology
b. Food
c. Drugs
d. All of these
131. Bacteria are also responsible for spoilage of:
a. Food
b. Vegetables
c. Both A & B
d. None of these
132. Bacteria species known to cause disease in humans are approximately:
a. 200
b. 50
c. 300
d. 100
133. The heat that causes coagulation of proteins and kill the microbes:
a. Intense heat
b. Moist heat
c. Mild heat
d. Dry heat
134. The heat that causes oxidation of chemical constituents of microbes and kills them:
a. Intense heat
b. Moist heat
c. Mild heat
d. Dry heat
135. Certain electromagnetic radiations below 300 nm are effective in killing of:
a. Birds
b. Plants
c. Microorganisms
d. Mammals
136. Membrane filters are used to sterilize heat sensitive compounds like:
a. Hormones
b. Serums
c. Antibiotics
d. All of these
137. Chemical substances used on living tissues that inhibit the growth of microorganisms are called as:
a. Sterilizers
b. Disinfectants
c. Counteracting sepsis
d. Antiseptics
138. Halogens and phenols, hydrogen peroxide, potassium per magnate, alcohol and formaldehyde are:
a. Antiseptics
b. Disinfectants
c. Antigens
d. Antibiotics
139. Disinfectants inhibit the growth of vegetative cell and are used on:
a. Living materials
b. Nonliving materials
c. Both A & B
d. None of these
140. Methods of prevention and treatment that have been introduced to control microbial diseases include:
a. Chemotherapy
b. Immunization
c. Antisepsis
d. All of these
141. Tetracycline and penicillin are:
a. Antibiotics
b. Disinfectants
c. Antigens
d. Antiseptics
142. Pasteur called the attenuated cultures of bacteria, vaccine and immunization with attenuated cultures of bacteria:
a. Injection
b. Vaccination
c. Shot
d. Inoculation
143. Pasteur also made a vaccine for:
a. Rabies
b. Hydrophobia
c. Myopia
d. Both A & B
144. A disease transmitted to people by bites from rabid dogs, cats and other animals is:
a. Rabies
b. Hydrophobia
c. Myopia
d. Both A & B
145. The word “Antibiotics” is:
a. French
b. Italian
c. Greek
d. Latin
146. Misuse of penicillin may cause:
a. Allergy
b. Fever
c. Discoloration
d. Deafness
147. ………. can induce auditory nerve thus causing deafness:
a. Streptomycin
b. Tetracyclin
c. Neomycin
d. Chloramphenicol
148. Antibiotics are synthesized and secreted by certain bacteria, antinomycetes and:
a. Lichen
b. Algae
c. Virus
d. Fungi
149. Misuse of antibiotic such as penicillin can cause:
a. Deafness
b. Allergic reactions
c. Mental retardness
d. Headache
150. Reserver found material in cyanobacteria is:
a. Protein
b. Glycogen
c. Sterols
d. Fat
151. Cyanobacteria exist in the form of:
a. Colony
b. Unicellular
c. Filaments
d. All of these
152. Cyanobacteria range in diameter from about ……….;
a. 0.1-1
b. 1-5
c. 1-10
d. 5-10
153. The cyanobacteria are the largest and most diverse group of photosynthetic bacteria which is previously known as:
a. Blue green algae
b. Red algea
c. Brown algae
d. Green algae
154. Name the cyanobacteria which are helpful in fixing atmospheric nitrogen:
a. Nostoc
b. Heterocyst
c. Hormogonium
d. Akinetes
155. Cyanobacteria are photosynthetic partner in most of ……….association:
a. Algal
b. Lichen
c. Plant
d. Fungal
156. The thick walled reproductive cell of cyanobacteria are called:
a. Hermogonia
b. Heterocyst
c. Akinete
d. Trichome
157. All of the following are related to nostoc except:
a. Branched filmaents
b. Trichome
c. Heterocyst
d. Slimy covering
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