Bacteria Test 1

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:In Escherichia coli

Answers Choices:

An organised nucleus is present

One chromosome is present

One DNA molecule is present

One RNA molecule is present

Questions 2 of 50

Question:Which of the following fixes \(C{O_2}\) in carbohydrates

Answers Choices:

Bacillus

Rhizobium

Nitrobacter

Rhodospirillium

Questions 3 of 50

Question:Bacteria are considered as plants, because

Answers Choices:

These have a rigid cell wall

They have a green colour

They can reproduce

They are present everywhere

Questions 4 of 50

Question:Bacterial ribosomes are called

Answers Choices:

Autosomes

Dictyosomes

Centrosomes

Polyribosomes

Questions 5 of 50

Question:What is the nuclear material of a bacterium

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Nucleic acid and histone protein

Nucleic acid and cytoplasm

Only nucleic acid

All the above

Questions 6 of 50

Question:Why surgical instruments are boiled in water before use

Answers Choices:

For killing the pathogens present on them

So that doctors can use them easily

Provides pleasure to the patient

All the saprophytes die on the operative surface

Questions 7 of 50

Question:In many bacteria the cell membrane becomes invaginated and folded to form

Answers Choices:

Cristae

Mesoscmes

Fimbriae

Pili

Questions 8 of 50

Question:The bacterial genome is

Answers Choices:

Circular

Filamentous

RNA-DNA hybrid

Both (1) and (2)

Questions 9 of 50

Question:The nitrifying bacteria are

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Autotrophic

Saprophytic

Parasitic

Chemosynthetic

Questions 10 of 50

Question:Thiobacillus ferrodoxin liberate energy by oxidizing

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Fe++ to Fe+++

Cu+ to Cu +

Fe+++ to Fe++

None of the above

Questions 11 of 50

Question:An English surgeon believed that micro-organisms of the air caused infection in the wound and to avoid the infection he used carbolic acid and hence he became, 'The Father of Modern Antiseptic Surgery'. He was

Answers Choices:

Edward Jenner

Louis Pasteur

William Harvey

Joseph Lister

Questions 12 of 50

Question:Fimbriae are

Answers Choices:

Organs of adhesion

Antigenic

Organs which form conjugation tube through which genetic material is transferred from donor to recipient cell

All the above

Questions 13 of 50

Question:Circular DNA molecule occurs in

Answers Choices:

Viruses

Bacteria, chloroplasts and mitochondria

Bacteria and chloroplasts only

Bacteria only

Questions 14 of 50

Question:Extension of plasma membrane in prokaryotes is

Answers Choices:

ER

Mesosome

Ribosome

None of these

Questions 15 of 50

Question:Bacterial cells can be stained with

Answers Choices:

Mercuric chloride

Crystal violet

Crystal violet and iodine

Safranin

Questions 16 of 50

Question:First organism which was evolved on the earth

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Saprotrophs

Chemohetrotrophs

Photoautotrophs

Chemoautotrophs

Questions 17 of 50

Question:Which one of the following is also called halophiles

Answers Choices:

Eubacteria

Actinomycetes

Archaebacteria

Cyanobacteria

Questions 18 of 50

Question:A mutant micro-organism unable to synthesize a compound required for its growth but able to grow if the compound is provided, is known as

Answers Choices:

Auxotroph

Prototroph

Autotroph

None of these

Questions 19 of 50

Question:The experimental system used in studies of the discovery of replication of DNA has been

Answers Choices:

Drosophila melanogaster

Pneumococcus

Escherichia coli

Neurospora crassa

Questions 20 of 50

Question:Pili in bacteria represent

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Extra-chromosomal genetic element

Protoplasmic outgrowths of donor cells

Small flagella

Special bacterial cilia

Questions 21 of 50

Question:The process of replication in plasmid DNA, other than initiation, is controlled by

Answers Choices:

Plasmid gene

Bacterial gene

Cytoplasmic gene

Mitochondrial gene

Questions 22 of 50

Question:Viral genome incorporated and integrates with bacterial genomes is refer to as

Answers Choices:

Prophages

RNA

DNA

Both 1 and 3

Questions 23 of 50

Question:The Streptococcus lactis is responsible for

Answers Choices:

Conversion of milk into curd

Conversion of molasses into alcohol

Tanning of leather

Flavouring the leaves of tea and tobacco

Questions 24 of 50

Question:A free living anaerobic bacterium capable of \({{\rm{N}}_{\rm{2}}}\)fixation in soil is

Answers Choices:

Rhizobium

Azotobacter

Streptococcus

Clostridium

Questions 25 of 50

Question:Bacteria which convert the nitrogen of the air to nitrogenous compounds are called

Answers Choices:

Nitrifying

Nitrogen fixing

Denitrifying

Putrefying

Questions 26 of 50

Question:Which of the following decompose the remanents of the plants into \(C{O_2}\) and water

Answers Choices:

Algae

Sunlight

Virus

Bacteria

Questions 27 of 50

Question:What is the cause of flavour of tea and tobacco leaves

Answers Choices:

Mechanical method

Different strains of bacteria

Activity of fungi

Action of viruses

Questions 28 of 50

Question:A suspension of killed or attenuated bacteria useful for artificial immunization is

Answers Choices:

Bacteriocin

Bacteriolysin

Bacterin

Barophile

Questions 29 of 50

Question:The main role of bacteria in the carbon cycle involves

Answers Choices:

Photosynthesis

Assimilation of nitrogenous compounds

Chemosynthesis

Digestion or breakdown of organic compounds

Questions 30 of 50

Question:Wine turns sour because of

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Heat

Aerobic bacteria

Anaerobic bacteria

None of these

Questions 31 of 50

Question:Which of the following is non-symbiotic biofertilizer

Answers Choices:

VAM

Azotobacter

Anabaena

Rhizobium

Questions 32 of 50

Question:Which does not help in \({N_2}\) fixation

Answers Choices:

Anabaena

Nostoc

Oscillatoria

Rhizobium

Questions 33 of 50

Question:Penicillin antibiotic which effects bacterial

Answers Choices:

DNA replication

Protein synthesis

Plasma membrane properties

Peptidoglycan synthesis (cell wall)

Questions 34 of 50

Question:Mycolic acid is present in cell wall of pathogen causing

Answers Choices:

Tetanus

Cholera

Diphtheria

Tuberculosis

Questions 35 of 50

Question:Which of the following is disease causing bacterium in human beings

Answers Choices:

Escherichia coli

Xanthomonas citri

T.M.V.

Pilobolus

Questions 36 of 50

Question:Which one of the following pathogen cause canker disease

Answers Choices:

Meloidogyne incognita

Anguina tritici

Xanthomonas citri

Pseudomonas rubilineans

Phytophthora infestans

Questions 37 of 50

Question:Elementary cell body in mycoplasma perform the function of

Answers Choices:

Metabolism

Excretion

Reproduction

Respiration

Questions 38 of 50

Question:Which class mycoplasma belongs

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Schizomycetes

Molicutes

Myxomycetes

None of these

Questions 39 of 50

Question:Mycoplasma is a

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Saprophyte

Parasite

Some species are parasites and others are saprophytes

None of these

Questions 40 of 50

Question:Which may be called as bedsonia

Answers Choices:

Virus

Mycoplasma

L-form bacteria

All the above

Questions 41 of 50

Question:Which may live as a space parasite in Anthoceros

Answers Choices:

Ulothrix

Spirogyra

Nostoc

None of these

Questions 42 of 50

Question:Incipient nucleus is present in

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Chlorophyceae

Rhodophyceae

Myxophyceae

Phaeophyceae

Questions 43 of 50

Question:The fossil record of blue-green algae is in

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Palaeozoic

Pre-palaeozoic

Carboniferous

None of these

Questions 44 of 50

Question:What is the photosynthetic product in blue-green algae

Answers Choices:

Normal starch

Glycogen

Cyanophycean starch resembling glycogen

None of these

Questions 45 of 50

Question:Which were the organisms who changed earth's surface from reducing to the oxidizing

Answers Choices:

Autotrophs

Heterotrophs

Photoautotrophs

Chemotrophs

Questions 46 of 50

Question:When green algae are illuminated, motile aerobic bacteria usually accumulate near them. This is because, bacteria

Answers Choices:

Have attraction for light

Have attraction for green plants

Have attraction for oxygen

Have attraction for \(C{O_2}\)

Questions 47 of 50

Question:Sexual reproduction is absent in

Answers Choices:

Cyanobacteria

Bacteria

Eukaryote

All of the above

Questions 48 of 50

Question:Nostoc is known to perform

Answers Choices:

Only photosynthesis

Photosynthesis and nitrogen fixation simultaneously

Only nitrogen fixation

Either photosynthesis or nitrogen fixation at a time

Questions 49 of 50

Question:Which species of Nostoc produces endospores

Answers Choices:

Nostoc microscopium

Nostoc commune

Both (1) and (2)

None

Questions 50 of 50

Question:Farmers have reported over 50% higher yields of rice by using which of the following biofertilizer

Answers Choices:

Mycorrhiza

Azolla pinnata

Cyanobacteria

None of these