Kingdom Monera MCQ (Multiple Choice Questions and Answers)
Question 1 : If a bacterial cell divides once every minute and takes 60 minutes to fill a cup. How much time it will take to fill half the cup?
A) 30 min.
B) 32 min.
C) 29 min.
D) 59 min.
Answer : D
Question 2 : Blue green algae used in rice fields to increase fertility is
A) Rivularia
B) Nostoc
C) Aulosira
D) Anabaena
Answer : C
Question 3 : Extra nuclear DNA in E.coli is termed as
A) F+ factor
B) Sex factor
C) Episome
D) All of above
Answer : D
Question 4 : Smallest cell/organism is that of
A) Vibrio
B) Bacillus
C) Mycoplasma
D) Rhizobium
Answer : C
Question 5 : Bacteria which retain purple colour after staining with Gram stain is
A) Gram +ve
B) Gram -ve
C) Trichous
D) Spirillum
Answer : A
Question 6 : Blue green algae cultivated in water tanks as protein rich animal food are
A) Spirillum
B) Spirulina
C) Oscillatoria
D) Nostoc
Answer : B
Question 7 : The common mode of reproduction in bacteria is
A) Fission
B) Budding
C) Sexual reproduction
D) Sporulation
Answer : A
Question 8 : Typhoid is caused by
A) Xanthomonas typhosus
B) Bacillus desenteriae
C) Salmonella typhi
D)Bacillus diplococcus
Answer : C
Question 9 : Griffith performed experiments on bacteria
A) Bacillus pneumoniae
B) Diplococcus pneumoniae
C) Salmonella pneumoniae
D) Xanthomonas pneumoniae
Answer : B
Question 10 : Bacteria cannot survive in a highly salted pickle because
A) Salts inhibit reproduction
B) Bacteria do not get enough light for photosynthesis
C) They become plasmolysed and consequently killed
D) The pickle does not contain nutrients necessary for bacteria to live.
Answer : C
Question 11 : Studies of Griffith concluded the occurrence of
A) Transformation in bacteria
B) Conjugation in bacteria
C) Asexuality in bacteria
D) Transduction in bacteria
Answer : A
Question 12 : Pasteruization means
A) Vaccination for a baby against small pox
B) Sterilization in steam cooker at 100oC for 10 minutes
C) Heating milk or other liquids from 60oC to 70oC for short duration.
D) A technique of curing people bitten by mad dogs.
Answer : C
Question 13 : Bacteria differ from plants in that they do not have
A) DNA
B) RNA
C) Cell wall
D) A well defined nucleus
Answer : D
Question 14 : Bacteria having a tuft of flagella at one end are called
A) Peritrichous
B) Monotrichous
C) Lophotrichous
D) Amphitrichous
Answer : C
Question 15 : Bacteria having a tuft of flagella at both ends are called
A) Peritrichous
B) Bitrichous
C) Amphitrichous
D) Atrichous
Answer : C
Question 16 : Bacteria were regarded to be plants because
A) Some of them are green
B) They are present every where
C) Some of them cannot move
D) They have a rigid cell wall.
Answer : D
Question 17 : It is important to boil surgical instruments before using them in an operation. It is done
A) To kill all the pathogens which may be infecting the instruments
B) To facilitate the handling of the instruments by the doctor
C) To enable the patient fell warm and comfortable at the time of operation
D) To kill all the pathogens present at the place of operation of the patient.
Answer : A
Question 18 : The fixation of nitrogen from the air in the modules of roots of leguminous plants is done by symbiotic bacteria
A) Azotobacter
B) Rhizobium
C) Bacillus subtilis
D) Micrococcus
Answer : B
Question 19 : Vinegar is prepared from fermented sugar solution by the activities of
A) Acetobacter aceti
B) Bacillus aceti
C) B. subtilis
D) Diplococcus
Answer : A
Question 20 : Streptococcus lactis is responsible for
A) Conversion of molasses into alcohol
B) Conversion of milk into curd
C) Tanning of leather
D) Falvoring the leaves of tea and tobacco
Answer : B
Question 21 : Cholera is caused by
A) Bacillus mycobacterium
B) Vibrio cholerae
C) Pseudomonas citri
D) Streptococcus cholerae
Answer : B
Question 22 : The preparation of flavouring of leaves of tea and tobacco is due to the activities of
A) Streptococcus lactis
B) Bacillus megatherium
C) Acetobacter
D) Bacillus radicicola
Answer : B
Question 23 : Biogas is produced by
A) Eubacteria
B) Archaebacteria
C) Mycoplasma
D) Cyanobacteria
Answer : B
Question 24 : Bacillus romasus and Bacillus vulgaris are examples of
A) Ammonifying bacteria
B) Nitrate bacteria
C) Nitrite bacteria
D) Symbiotic bacteria
Answer : A
Question 25 : The fixation of free nitrogen by bacteria in the soil is done by
A) Azobacter
B) Nitrosomonas
C) Nitrobacter
D) Thiobacillus
Answer : A
Question 26 : Bacillus subtilis are
A) Hay bacteria
B) Nitrifying bacteria
C) Ammonifying bacteria
D) Intestinal bacteria
Answer : A
Question 27 : Nitrifying bacteria convert the
A) Nitrates into nitrites
B) Nitrites into nitrates
C) Ammonium salts into nitrates
D) Ammonium salts into amino acids
Answer : C
Question 28 : The bacterial genome is called
A) Nucleus
B) Nucleolus
C) Nucleoid
D) None
Answer : C
Question 29 : Escherichia coli is a bacterium which is common inhabitant of
A) Human intestine
B) Soil
C) Milk
D) Water
Answer : A
Question 30 : The cells of cyanobacteria and bacteria exhibit similarity in having
A) Plastids
B) Nuclei
C) Centrosome
D) Naked DNA
Answer : D
Question 31 : Chemosynthetic bacteria do not need sunlight to grow because
A) They prepare food without the help of light
B) They do not like sunlight brightness
C) Due to absence of chlorophyll they are incapable of manufacturing their own food
D) They use other kinds of light for manufacturing their own food.
Answer : A
Question 32 : Clostridium butylicum has been used in the synthesis of
A) Vitamin B
B) Vitamin A
C) Vitamin C
D) Vitamin D
Answer : A
Question 33 : Organisms which participate most actively in nitrogen cycle in nature are
A) Saprophytic angiosperms
B) Parasitic fungi
C) Bacteria
D) Cereals
Answer : C
Question 34 : Antibiotics are mostly obtained from
A) Bacteria
B) Viruses
C) Angiosperms
D) Fungi
Answer : A
Question 35 : Bacteria producing T.B. and Leprosy (Mycobacterium species) belong to
A) Archaebacteria
B) Actinomycetes
C) Eubacteria
D) Rickettsiae
Answer : B
Question 36 : Bacteria are classified on the basis of
A) Nucleus
B) Cell wall
C) Gram +ve and Gram -ve
D) Method of nutrition
Answer : C
Question 37 : A compound which is produced by an organism and inhibits the growth of other organism is called
A) Antiseptic
B) Anticoagulant
C) Antibiotic
D) Antiallergic
Answer : C
Question 38 : Sex pili are present in
A) Male Escherichia coli
B) Female Escherichia coli
C) Diplococcus
D) All bacteria
Answer : A
Question 39 : Syphilis causing Treponema pallidum belongs to the group
A) Rickettsiae
B) Bacillus
C) Actinomycetes
D) Spirillum
Answer : D
Question 40 : Bacteria resemble
A) Nostoc species
B) Mitochondria
C) Chlamydomonas
D) None of the above
Answer : A
Question 41 : Bacteria have incipient nucleus (nucleoid) and hence they are placed in
A) Prokaryota
B) Eukaryota
C) Fungi
D) Protista
Answer : A
Question 42 : Bacteria responsible for fermentation of dairy milk are
A) Lactobacillus
B) Hay Bacillus
C) Acetobacter
D) Rhizobium
Answer : A
Question 43 : Marsh gas is produced by
A) Mycoplasma
B) Myxobacteria
C) Methanogens
D) Halophiles
Answer : C
Question 44 : We can keep food for longer duration in cold storage than in ordinary cupboard because
A) Insects cannot cause infection
B) Bacterial multiplication is completely prevented
C) Bacterial multiplication is greatly reduced
D) Low temperature causes plasmolysis
Answer : C
Question 45 : The hydrogen donor in bacterial photosynthesis is usually/alert-announce]
A) Water
B) Hydrogen sulphide
C) Sulphuric acid
D) Ammonia
Answer : B
A) Dead Sea
B) Dal Lake
C) Arabian Sea
D) Godavari
Answer : A
Question 47 : Monerans devoid of a wall are
A) Actinomycetes
B) Cyanobacteria
C) Mycoplasma
D) Eubacteria
Answer : C
Question 48 : The process in which (genetic material is carried by some external agency) viruses are involved in sexual reproduction of bacteria is called
A) Transduction
B) Transcription
C) Transformation
D) Translation
Answer : A
Question 49 : Bacteria bearing flagella all over body are called
A) Peritrichous
B) Atrichous
C) Monotrichous
D) Cephalotrichous
Answer : A
Question 50 : Waksman got the Noble Prize for the discovery of
A) Penicillin
B) Chloromycetin
C) Streptomycin
D) Neomycin
Answer : C