Bacteria Test 5

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Chemosynthetic bacteria are those bacteria

Answers Choices:

Which carry out photosynthesis

Which synthesize food without light

Which are unable to carry out chemical process

Which carry out photosynthesis in absence of light

Questions 2 of 50

Question:Plasmids are

Answers Choices:

Viruses

New micro-organisms

Extra-chromosomal genetic material

None of these

Questions 3 of 50

Question:Bacterial flagella is made up of

Answers Choices:

Protein

Amines

Lipids

Carbohydrates

Questions 4 of 50

Question:Nature of Bacillus rimosus is

Answers Choices:

Nitrifying

Denitrifying

Ammonifying

All the above

Questions 5 of 50

Question:Bacterial flagella do not show ATPase activity and 9 + 2 organization. These are chemically

Answers Choices:

Flagellin

Pilin

Tubulin

Bacterin

Questions 6 of 50

Question:Length of Mycobacterium tuberculosis is

Answers Choices:

0.8\(\mu \)

0.6\(\mu \)

1.1\(\mu \)

0.7\(\mu \)

Questions 7 of 50

Question:Salmonella sp. Is

Answers Choices:

Monotrichous

Lophotrichous

Amphitrichous

Peritrichous

Questions 8 of 50

Question:Spirochaetes are.......in shape

Answers Choices:

Spiral

Conical

Coccus

None of the above

Questions 9 of 50

Question:Organisms which have cells but no distinct nucleus

Answers Choices:

Bacteria

Cyanobacteria

Both (1) and (2)

None of these

Questions 10 of 50

Question:Nucleic acids in chromosomes in bacteria are

Answers Choices:

Two types of DNA and RNA

Linear DNA

Circular DNA

Linear RNA

Questions 11 of 50

Question:Many bacteria bear minute hairy structures on their cell wall, these are called

Answers Choices:

Hairs

Flagella

Pili

Cilia

Questions 12 of 50

Question:The DNA of E.coli is

Answers Choices:

Single stranded and linear

Single stranded and circular

Double stranded and linear

Double stranded and circular

Questions 13 of 50

Question:The correct sequence of stages of growth curve for bacteria is

Answers Choices:

Decline, lag, log phase

Lag, log, stationary phase

Stationary, lag, log, decline phase

Lag, log, stationary, decline phase

Questions 14 of 50

Question:Photosynthetic bacteria have pigments in

Answers Choices:

Leucoplasts

Chloroplasts

Chromoplasts

Chromatophore

Questions 15 of 50

Question:High tolerance The bacteria growing on medium and the mass so formed is called

Answers Choices:

Thallus

Spores

Colony

Tissue

Questions 16 of 50

Question:Why the food can be kept for a longer time in cold house than in normal conditions

Answers Choices:

Insect can not enter

Bacterial multiplication stops

Bacterial multiplication is reduced

There is plasmolysis at low temperature

Questions 17 of 50

Question:Why bacteria can be considered fission fungi

Answers Choices:

They show budding

They show fission

Show fission and fungal characters

Show fission and algal characters

Questions 18 of 50

Question:How many generations are required for a bacterium to produce 1024 cells by vegetative reproduction

Answers Choices:

256

10

6

8

Questions 19 of 50

Question:Transformation in bacteria was discovered by

Answers Choices:

Lederberg

Griffith

Avery et al

Tatum

Questions 20 of 50

Question:Penicillin inhibits bacterial multiplication because

Answers Choices:

It checks spindle formation

It destroys chromation

It inhibits cell wall formation

It checks RNA synthesis

Questions 21 of 50

Question:Nitrogen fixing bacteria are associated with

Answers Choices:

Leguminosae

Cruciferae

Gramineae

Malvaceae

Questions 22 of 50

Question:Which of the following is recently discovered gram positive non-leguminous nitrogen fixing bacterium

Answers Choices:

Azospirillum

Rhizobium

Nitrosomonas

Spirillum

Questions 23 of 50

Question:Nitrifying bacteria, Nitrosomonas and Nitrobactor

Answers Choices:

Convert (oxidise) ammonia or ammonium compounds into nitrates

Convert nitrate into nitrogen

Convert nitrogen into nitrates

Convert carbon dioxide into carbohydrates

Questions 24 of 50

Question:The denitrification means

Answers Choices:

Reduction of \(N{O_2}\) to ammonia form by bacteria in the soil

Oxidation of ammonia to nitrate form

Conversion of ammonia to amino acids

Conversion of ammonia and nitrates to gaseous nitrogen in the soil

Questions 25 of 50

Question:Waksman got the Nobel Prize for the discovery of

Answers Choices:

Penicillin

Streptomycin

Chloromycetin

Neomycin

Questions 26 of 50

Question:A compound which is produced by an organism and inhibits the growth of other organism is called

Answers Choices:

Antiseptic

Anticoagulant

Antibiotic

Anti-allergic

Questions 27 of 50

Question:One of the useful activities of several bacteria is

Answers Choices:

Nitrogen fixation

Nitrification

Operation of biogeochemical cycles

All of the above

Questions 28 of 50

Question:Which one of the following can utilize molecular nitrogen (\({N_2}\)) as nutrient for growth

Answers Choices:

Rhizobium

Spirogyra

Mucor

Methanococcus

Questions 29 of 50

Question:Which of the following is used to cure off the bitterness of tea leaves

Answers Choices:

Bacillus subtilis

B. megatherium

B. lactis

B. mycococcus

Questions 30 of 50

Question:For retting of jute the fermenting microbe used is

Answers Choices:

Methophilic bacteria

Butyric acid

Helicobacter pylori

Streptococcus lactin

Questions 31 of 50

Question:Which of the following is a free living nitrogen fixing bacteria present in the soil

Answers Choices:

Pseudomonas

Rhizobium

Azotobacter

Nitrosomonas

Questions 32 of 50

Question:The germ theory of disease was putforth by

Answers Choices:

Koch

Pasteur

Rayer

Devaine

Questions 33 of 50

Question:Plague is a bacterial disease caused by

Answers Choices:

Pasteurella pestis

Clostridium

Mycobacterium

Vibrio

Questions 34 of 50

Question:'Citrus canker' is caused by a

Answers Choices:

Fungus

Bacterium

Virus

Nematoda

Questions 35 of 50

Question:Diphtheria is caused by

Answers Choices:

Viruses

Eukaryotes

Mycoplasma

Bacteria

Questions 36 of 50

Question:Which type of organism are PPLO

Answers Choices:

Virus

Viroid

Mycoplasma-like

Bacteria

Questions 37 of 50

Question:Mycoplasma is a

Answers Choices:

Eukaryotic and multicellular

Prokaryotic and multicellular

Prokaryotic and unicellular

Eukaryotic and unicellular

Questions 38 of 50

Question:Penicillin and Vancomycin do not affect the mycoplasma because

Answers Choices:

There is no cell wall

There is no nucleus

There is no mitochondria

There is no golgi body

Questions 39 of 50

Question:Which disease is caused by mycoplasma

Answers Choices:

Citrus greening

Sandal spike

Grassy shoot of sugarcane

All the above

Questions 40 of 50

Question:Mycoplasma is

Answers Choices:

Gram positive

Gram negative

Some species are gram positive

None of the above

Questions 41 of 50

Question:An organism having cytoplasm DNA and RNA but no cell wall is

Answers Choices:

Cyanobacterium

Mycoplasma

Bacterium

Virus

Questions 42 of 50

Question:Which of the following statement is true for Mycoplasma

Answers Choices:

Presence of cell wall

Presence of nucleus

Absence of cell wall

None of these

Questions 43 of 50

Question:Which of the following is coloured portion in the cell of Nostoc

Answers Choices:

Chromoplasm

Centroplasm

Central body

Genophore

Questions 44 of 50

Question:Which of the following characters of Nostoc resembles other prokaryotes

Answers Choices:

Absence of definite nucleus

Ability to fix nitrogen

Multiplication by fission

All the above

Questions 45 of 50

Question:Blue-green algae and bacteria show similarity in

Answers Choices:

Both show anaerobic respiration

Both show the presence of chlorophyll

Both are devoid of true nucleus

None of the above

Questions 46 of 50

Question:Prokaryotes are characterized by

Answers Choices:

A true nucleus with double layered nuclear membrane is absent

Well developed nucleus with double layered nuclear membrane present

Presence of cell wall made of chitins, mucopolysaccharides and absence of cell organelles like mitochondria and chloroplasts

Autotrophic in nature and only DNA is present

Questions 47 of 50

Question:Heterocysts are found in certain

Answers Choices:

Viruses

Bacteria

Cyanobacteria

Mycoplasmas

Questions 48 of 50

Question:Cyanobacteria is a

Answers Choices:

Virus which affect bacteria

Bacteria which used cyanide as nutrition

Algae which has blue-green pigment

Colourful fungi

Questions 49 of 50

Question:Which of the following is not a blue-green algae

Answers Choices:

Nostoc

Anabaena

Lichen

Aulosiras

Questions 50 of 50

Question:Anabaena has an immense potential as a

Answers Choices:

Biofertilizer

Food

Medicines

Sewage disposal