question_answer 1) A bacterium divides every 35 minutes. If a culture containing 105 cells per ml is grown for 175 minutes, what will be the cell concentration per ml after 175 minutes? [AIPMT 1998]
A)
175 × 105 cells
done
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B)
85 × 105 cells
done
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C)
35 × 105 cells
done
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D)
32 ×105 cells
done
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question_answer 2) Transfer of genetic information from one bacterium to another in the transduction process is through:[AIPMT 1998]
A)
physical contact between donor and recipient strains
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B)
conjugation between opposite strain bacterium
done
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C)
bacteriophages released from the donor bacterial strain
done
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D)
another bacterium having special organ for conjugation
done
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question_answer 3) In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria ? [AIPMT 1998]
A)
Monera
done
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B)
Fungi
done
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C)
Plantae
done
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D)
Protista
done
clear
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question_answer 4) A few organisms are known to grow and multiply at temperatures of 100-105°C. They belong to: [AIPMT 1998]
A)
thermophilic subaerial fungi
done
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B)
marine archaebacteria
done
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C)
thermophilic sulphur bacteria.
done
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D)
hot spring blue-green algae
done
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question_answer 5) Photosynthetic bacteria have pigments in: [AIPMT 1999]
A)
chromoplasts
done
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B)
leucoplasts
done
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C)
chloroplasts
done
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D)
chromatophore
done
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question_answer 6) In prokaryotes, the genetic material is: [AIPMT 1999]
A)
linear DNA without histones
done
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B)
linear DNA with histones
done
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C)
circular DNA with histones
done
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D)
circular DNA without histones
done
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question_answer 7) Difference in Gram + and Gram - bacteria is due to: [AIPMT 2001]
A)
cell wall
done
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B)
cell membrane
done
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C)
ribosome
done
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D)
cytoplasm
done
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question_answer 8) In Lederberg's replica plating experiment what was used to obtain streptomycin resistant strain? [AIPMT 2001]
A)
Minimal medium and streptomycin
done
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B)
Complete medium and streptomycin
done
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C)
Only minimal medium
done
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D)
Only complete medium
done
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question_answer 9) What is true for archaebacteria? [AIPMT 2001]
A)
All are halophilic
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B)
All are photosynthetic
done
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C)
All are fossils
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D)
These are oldest living beings
done
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question_answer 10) Extranuclear inheritance occurs in: [AIPMT 2001]
A)
Killer Paramecium
done
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B)
Killer Amoeba
done
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C)
Euglena
done
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D)
Hydra
done
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question_answer 11) Plasmid is: [AIPMT 2001]
A)
fragment of DNA which acts as vector
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B)
a fragement which joins two genes
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C)
m-RNA which acts as carrier
done
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D)
autotrophic fragment
done
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question_answer 12) Which bacteria are utilized in gober gas plant? [AIPMT 2002]
A)
Methanogens
done
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B)
Nitrifying bacteria
done
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C)
Ammonifying bacteria
done
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D)
Denitrifying bacteria
done
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question_answer 13) Which statements is correct for bacterial transduction? [AIPMT 2002]
A)
Transfer of some genes from one bacteria to another bacteria through virus
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B)
Transfer of genes from one bacteria to another bacteria by conjugation
done
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C)
Bacteria obtained its DNA directly
done
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D)
Bacteria obtained DNA from other external source
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question_answer 14) Transformation experiment was first performed on which bacteria? [AIPMT 2002]
A)
E. coli
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B)
Diplococcus pneumonia
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C)
Salmonella
done
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D)
Pasteurella pestis
done
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question_answer 15) Choromosomes in a bacterial cell can be 1-3 in number and: [AIPMT 2003]
A)
can be either circular or linear, but never both within the same cell
done
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B)
can be circular as well as linear within die same cell
done
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C)
are always circular
done
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D)
are always linear
done
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question_answer 16) Which one of the following bacteria has found extensive use in genetic engineering work plants? [AIPMT 2003]
A)
Bacillus coagulens
done
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B)
Agrobacterium tumefaciens
done
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C)
Costridium septicum
done
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D)
Xanthomonas citri
done
clear
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question_answer 17) For retting of jute the fermenting microbe used is: [AIPMT (S) 2005]
A)
Helkobactor pylori
done
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B)
Mcthophilic bacteria
done
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C)
Streptococcus lactin
done
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D)
Butyric acid bacteria
done
clear
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question_answer 18) Barophilic prokaryotes:
A)
grow slowly in highly alkaline frozen lakes at high altitudes
done
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B)
occur in water containing high concentrations of barium hydroxide
done
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C)
grow and multiply in very deep marine sediments
done
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D)
readily grown and divides in sea water enriched in any soluble salt of barium
done
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question_answer 19) Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used: [AIPMT (S) 2005]
A)
only on plates with streptomycin
done
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B)
on plates with minimal medium
done
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C)
only on plates without streptomycin
done
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D)
on plates with and without streptomycin
done
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question_answer 20) Curing of tea leaves is brought about by the activity of: [AIPMT (S) 2006]
A)
bacteria
done
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B)
mycorrhiza
done
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C)
viruses
done
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D)
fungi
done
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question_answer 21) Which one of the following statements about mycoplasma is wrong? [AIPMT (S) 2007]
A)
They are also called PPLO
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B)
They are pleomorphic
done
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C)
They are sensitive to penicillin
done
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D)
They cause disease in plants
done
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question_answer 22) In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one, of the following statement is true about archaea? [AIPMT (S) 2008]
A)
Archaea resemble eukarya in all respects
done
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B)
Archaea have some novel features that are absent is other prokaryotes and eukaryotes
done
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C)
Archaea completely differ from both prokaryotes and eukaryotes
done
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D)
Archaea completely differ from prokaryotes
done
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question_answer 23) Thermococcus, Methanococcus and Methanobacterium exemplify [AIPMT (S) 2008]
A)
archaebacteria that contain protein homologous to eukaryotic core histones
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B)
archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
done
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C)
bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
done
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D)
bacteria that contain a cytoskeleton and ribosomes
done
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question_answer 24)
Select the correct combination of the statements (A-D) regarding the characteristics of certain organisms. [AIPMT (M) 2010] Methanogens are Archaebacteria, which produce methane in marshy areas. Nostoc is a filamentous blue-green algae, which fixes atmospheric nitrogen. Chemosynthetic-, .autotrophic bacteria synthesize cellulose from glucose. Mycoplasma lack a cell wall and can survive without oxygen.
A)
B, C
done
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B)
A, B, C
done
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C)
B, C, D
done
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D)
A, B, D
done
clear
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question_answer 25) Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups called [AIPMT (S) 2010]
A)
eubacteria and archaea
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B)
cyanobacteria and diatoms
done
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C)
protists and mosses
done
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D)
liverworts and yeasts
done
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question_answer 26) A prokaryofic autotrophic nitrogen fixing symbiont is found in [AIPMT (S) 2011]
A)
Cycas
done
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B)
Cicer
done
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C)
Pisum
done
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D)
Ainus
done
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question_answer 27) Maximum nutritional diversity is found in the group [AIPMT (S) 2012]
A)
Fungi
done
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B)
Animalia
done
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C)
Monera
done
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D)
Plantae
done
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question_answer 28) Which of the following are likely to be present in deep sea water? [NEET 2013]
A)
Archaebacteria
done
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B)
Eubacteria
done
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C)
Blue-green algae
done
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D)
Saprophytic fungi
done
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question_answer 29) Archaebacteria differ from eubacteria in [NEET 2014]
A)
cell membrane structure
done
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B)
mode of nutrition
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C)
cell shape
done
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D)
mode of reproduction
done
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question_answer 30) Which structures perform the function of mitochondria in bacteria? [NEET 2014]
A)
Nucleoid
done
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B)
Ribosomes
done
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C)
Cell wall
done
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D)
Mesosomes
done
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question_answer 31) The motile bacteria are able to move by [NEET 2014]
A)
fimbriae
done
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B)
flagella
done
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C)
cilia
done
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D)
pili
done
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question_answer 32) Cell wall is absent in [NEET (Re) 2015]
A)
Aspergillus
done
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B)
Funaria
done
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C)
Mycoplasma
done
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D)
Nostoc
done
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question_answer 33) The structures that help some bacteria to attach to rocks and/or host tissues are [NEET (Re) 2015]
A)
rhizoids
done
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B)
fimbriae
done
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C)
mesosomes
done
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D)
holdfast
done
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question_answer 34) Pick up the wrong statement. [NEET (Re)2015]
A)
Cell wall is absent in Animalia.
done
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B)
Protista have photosynthetic and heterotrophic modes of nutrition.
done
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C)
Some fungi are edible.
done
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D)
Nuclear membrane is present in Monera.
done
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question_answer 35)
Match the following list of microbes and [NEET (Re) 2015] A. Saccharomyces cerevisiae 1. Production of immuno suppressive agents B. Monascus purpureus 2. Ripening of Swiss cheese C. Trichoderma polysporum 3. Commercial production of ethanol D. Propionibacterium sharmanii 4. Production of blood-cholesterol lowering agents
A)
A-3, B-4, C-1, D-2
done
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B)
A-4, B-3, C-2, D-1
done
clear
C)
A-4, B-2, C-1, D-3
done
clear
D)
A-3, B-1, C-4, D-2
done
clear
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question_answer 36) Which one of the following statements is wrong? [NEET - 2016 Phase-I]
A)
Cyanobacteria are also called blue - green algae
done
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B)
Golden algae are also called desmids
done
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C)
Eubacteria are also called false bacteria
done
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D)
Phycomycetes are also called algal fungi
done
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question_answer 37) Which of the following is wrongly matched in the given table? [NEET - 2016 Phase-I]
A)
Microbe Product Application Trichoderma polysporum Cyclosporin A Immunosuppressive drug
done
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B)
Microbe Product Application Monascus purpureus Statins Lowering of blood cholesterol
done
clear
C)
Microbe Product Application Streptococcus Streptokinase Removal of clot from blood vessel
done
clear
D)
Microbe Product Application Clostridium butylicum Lipase Removal of oil stains
done
clear
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question_answer 38) The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the: [NEET - 2016 Phase-I]
A)
Halophiles
done
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B)
Thermoacidophiles
done
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C)
Methanogens
done
clear
D)
Eubacteria
done
clear
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question_answer 39) Methanogens belong to [NEET - 2016 Phase-II]
A)
Eubacteria
done
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B)
Archaebacteria
done
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C)
Dinoflagellates
done
clear
D)
Slime moulds
done
clear
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question_answer 40) Select the wrong statement [NEET - 2016 Phase-II]
A)
Bacteria cell wall is made up of peptidoglycan
done
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B)
Pili and fimbriae are mainly involved in motility of bacterial cells
done
clear
C)
Cyanobacteria lack flagellated cells
done
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D)
Mycoplasma is a wall - less microorganism
done
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question_answer 41)
Match Column-I with Column-II and select the correct option using the codes given below: [NEET - 2016 Phase-II] Column - I Column - II a. Citric acid (i) Trichoderma b. Cyclosporin A (ii) Clostridium c. Statins (iii) Aspergillus d. Butyric acid (iv) Monascus
A)
A-(iii), B-(i), C-(ii), D-(iv)
done
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B)
A-(iii), B-(i), C-(iv), D-(ii)
done
clear
C)
A-(i), B-(iv), C-(ii), C-(iii)
done
clear
D)
A-(iii), B-(iv), C-(i), D-(ii)
done
clear
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question_answer 42) Select the mismatch : [NEET-2017]
A)
Rhizobium - Alfalfa
done
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B)
Frankia - Alnus
done
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C)
Rhodospirillum - Mycorrhiza
done
clear
D)
Anabaena - Nitrogen fixer
done
clear
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question_answer 43) Which of the following are found in extreme saline conditions? [NEET-2017]
A)
Mycobacteria
done
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B)
Archaebacteria
done
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C)
Eubacteria
done
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D)
Cyanobacteria
done
clear
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question_answer 44) Oxygen is not produced during photosynthesis by [NEET - 2018]
A)
Cycas
done
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B)
Nostoc
done
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C)
Green sulphur bacteria
done
clear
D)
Chara
done
clear
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question_answer 45)
Match the following organisms with the products they produce: [NEET 2019] [A] Lactobacillus (i) Cheese [B] Saccharomyces cerevisiae (ii) Curd [C] Aspergillus niger (iii) Citric Acid [D] Acetobacter aceti (iv) Bread (v) Acetic Acid
Select the correct option
A)
A-(iii), B-(iv), C-(v), D-(i)
done
clear
B)
A-(ii), B-(i), C-(iii), D-(v)
done
clear
C)
A-(ii), B-(iv), C-(v), D-(iii)
done
clear
D)
A-(ii), B-(iv), C-(iii), D-(v)
done
clear
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question_answer 46)
Match Column-I with Column -II. [NEET 2019] Column-I Column-I [a] Saprophyte (i) Symbiotic association or fungi with plant roots [b] Parasite (ii) Decomposition of dead organic materials [c] Lichens (iii)Living on living plants of animals [d] Mycorrhiza (iv) Symbiotic association of algae and fungi
Choose the correct answer from the options given below:
A)
A-(ii), B-(i), C-(iii), D-(iv)
done
clear
B)
A-(ii), B-(iii), C-(iv), D-(i)
done
clear
C)
A-(i) B-(ii), C-(iii), D-(iv)
done
clear
D)
A-(iii), B-(ii), C-(i), D-(iv)
done
clear
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