Kingdom Monera Questions and Answers

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



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

Question 46 : Halophiles can comfortably live in

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