CBSE Questions for Class 11 Medical Biology Biological Classification Quiz 8 - MCQExams.com

A taxonomic species distinguished on the basis of morphological characters is
  • Morphospecies
  • Biospecies
  • Linneon
  • Neontological species
Aristotle wrote
  • Historia Animalium.
  • De Partibus Animalium.
  • De Generatione Animalium.
  • All the above.
Who discovered that RNA is genetic material in TMV?
  • Gierere and Schramm
  • Issacs and Lindemann
  • Sinsheimer
  • Delbruck
Tailed bacteriophage is
  • Non-motile
  • Actively motile in water
  • Motile on bacterial surface
  • Motile on surface of plant leaves
Virion is
  • Virus in stage of multiplication
  • Virus attached to host cell nucleus
  • Virus inside cytoplasm of host cell
  • Virus in cell free environment
Virus attacking blue-green algae is known as
  • Cyanophage
  • Coliphage
  • Bacteriphage
  • Zoophage
The first virus to be cultured in human cells was
  • Polio virus
  • Dengue virus
  • Influenza virus
  • HIV
T-bacteriophages possess
  • Rounded shape
  • Tadpole shape
  • Irregular shape
  • Rhomboid shape
Cell wall of bacteria$$/$$ cyanobacteria possesses
  • Chitin
  • Murein$$/$$Mucopeptide
  • Peptidoglycan and amino sugars
  • Both B and C
Bacteriophage $${T}_{2}$$ is
  • Filamentous
  • Cuboidal
  • Binal
  • Spherical
Who cultured the virus for the first time?
  • Stanley
  • Enders
  • Takahashi and Rawlins
  • Issacs and Lindemann
Process absent in viruses is
  • Replication
  • Mutation
  • Protein synthesis
  • Energy liberation
Virus consists of
  • Protein
  • Nuclei acid
  • Protein and $$RNA$$
  • Protein and nucleic acid
The stage following infection by virus when virus particles cannot be observed is
  • Infection phase
  • Eclipse phase
  • Maturation phase
  • Lysogenic phase
Enzymes are not found in
  • Fungi
  • Cyanobacteria
  • Virus
  • Algae
Spongiform encephalopathy is caused by
  • Prion
  • E. coli
  • Virus
  • Fungus
Proteinaceous infectious particles causing diseases are
  • Prions
  • Viroids
  • Viruses
  • Chlamydia
Bovine spongiform encephalopathy is a disease caused by prions in
  • Cow
  • Sheep
  • Potato
  • Man
Helical contractile sheath occurs in
  • Bacteria
  • Bacteriophage
  • Riboviruses
  • Fungi
Nucleic acid does not occur in
  • Prion
  • Viroid
  • Virus
  • Mycoplasma
The agents which are known to cause CJD are
  • Protein particles
  • A class of bacteria
  • A class of viruses
  • Fungi
Zygospore of Mucor/Rhizopus germinates to form 
  • Mycelium
  • Promycelium
  • Hyphae
  • Germ tube
Lichen depicts :
  • Parasitism between alga and fungus.
  • Parasitism between protist and bryophyte.
  • Symbiosis between algae and fungi
  • Symbiosis between alga and gymnosperm.
Which one does not have cellular structure?
  • Bacteriophage
  • PPLO
  • Bacterium
  • Diatom
Which of the following affect proteins and nucleic acids but not viruses?
  • Pressure
  • Enzyme treatment
  • Denaturation
  • All of the above
Bacteria cannot survive in a highly salted pickle because
  • Salts inhibit reproduction
  • Bacteria do not get enough light for photosynthesis
  • They become plasmolysed and consequently die
  • The pickle does not contain nutrients necessary for bacteria to live
Marsh gas is produced by
  • Mycoplasma
  • Myxobacteria
  • Methanogens
  • Halophiles
Viruses were seen under the microscope for the first time by
  • Ivanowsky
  • Takashahi and Rawlins
  • Mayer
  • Stanley
Which of the following is true about prions?
  • Useful polysaccharide of galactose
  • High molecular weight infectious protein
  • Small nucleic acid fragments capable of replication
  • Low molecular weight infectious proteins
The bacteria were regarded to be plants because:
  • Some of them are green
  • They are present every where
  • Some of them cannot move
  • They have a rigid cell wall
The group of bacteria devoid of peptidoglycan in its wall is
  • Archaebacteria
  • Cyanobacteria
  • Eubacteria
  • Nostocales
Biogas is produced by
  • Eubacteria
  • Archaebacteria
  • Mycoplasma
  • Cyanobacteria
Prokaryotes which can trap solar energy for ATP synthesis, but not for photosynthesis are
  • Methanogens
  • Thermoacidophiles
  • Halophiles
  • Cyanochloronta
Rickettsiae is a group of
  • Viruses
  • Microorganisms
  • Bacteria
  • PPLO
Which is the correct date of publication of "Species Plantarum" authored by Carolus Linnaeus?
  • 1st May, 1753
  • 1st January, 1935
  • 1st January, 1856
  • 1st May, 1858
Identify the option, which is not a common characteristic for bacteria and yeast.
  • Both are unicellular
  • Both are prokaryotes
  • Both are capable of causing fermentation
  • Both produce spores
Osmotrophs are
  • Bacteria
  • Fungi
  • Both A and B
  • Algae
An obligate anaerobe is
  • Ulothrix
  • Spirogyra
  • Methane bacteria
  • Onion
Food poisoning and gas forming rod-shaped bacterium is
  • Shigella
  • Salmonella
  • Clostridium
  • Escherichia coli
Lichen is an example of ___________.
  • Commensalism
  • Mutualism
  • Parasitism
  • Mycorrhizal association
For production of methane, methanogens
  • Oxidise carbon dioxide
  • Reduce carbon dioxide
  • Reduce alcohol
  • Oxidise alcohol
The common mode of reproduction in Rhizopus is by
  • Sporangiospores
  • Oidia
  • Plasmospores
  • Zoospores
Bacteria and other monerans do not possess:
  • Ribosomes
  • Mitochondria
  • Plasma membrane
  • Cell wall
Which one belongs to monera?
  • Amoeba
  • Escherichia
  • Gelidium
  • Spirogyra
Bacteria are thought to be primitive organisms because they
  • Are small, microscopic plants, which cannot be seen by naked eye
  • Cause serious diseases in human beings, domesticated animals and crop plants
  • Produce endospores which are very resistant to adverse conditions
  • Possess incipient nucleus and show division similar to amitosis
Archaebacteria found in salt pans and salt marshes are
  • Methanogens
  • Thermoacidophiles
  • Ruminant symbionts
  • Halophiles
Which of the following is a good example of heterothallism?
  • Spirogyra
  • Rhizopus
  • Pinus
  • Castor bean
In endomycorrhiza, the fungus is commonly
  • Zygomycete
  • Phycomycete
  • Ascomycete
  • Basidiomycete
In Penicillium, asexual reproduction takes place by
  • Ascospore
  • Aplanospores
  • Sporangiospores
  • Conidia
In Penicillium, the mycelium bears sex organs. The male organ is called antheridium while the female one is known as:
  • Archegonium
  • Spermatangium
  • Ascogonium
  • Sporogonium
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