CBSE Questions for Class 11 Medical Biology Biological Classification Quiz 9 - MCQExams.com

Thick walled asexual spores formed by Rhizopus are
  • Apalnospores
  • Akinetes
  • Plasmospores
  • Chlamydospores
The zygospores of Rhizopus contain a high amount of fat globules. It is thick walled and the colour is
  • Green
  • White
  • Grey
  • Black
In yeast, the sexual reproduction is by conjugation. After fusion the zygotic nucleus divides meiotically and forms haploid spores. The unicellular structure with haploid spores is
  • Sporangium
  • Gametangium
  • Ascus
  • Zoosporangium
Sometimes in yeast the conjugation takes place between a parent cell and a bud. It is called
  • Isogamy
  • Pedogamy
  • Pseudogamy
  • Syngamy
In which of the following stage of Rhizopus 'n' number of chromosome is not found?
  • Zygospore
  • Hypha
  • Sporangium
  • Spore
An organism without true nucleus is
  • Bacterium
  • Archaebacterium
  • Cyanobacterium
  • All the above
Pin Mold or Mucor reproduces itself by means of
  • Buds
  • Fragmentation
  • Autogamy
  • Spores
The conidia are borne on stetrigmata which are in turn borne by ____________.
  • Rami
  • Metulae
  • Phalides
  • Conidiophores
Two micronuclei occur in _____________.
  • Paramecium aurelia
  • Paramecium caudatum
  • Paramecium multimicronucleatum
  • Balantidium coli
Reproduction in Mucor takes place by
  • Isogametes
  • Anisogametes
  • Agametes
  • None of the above
Water collecting canals around the contractile vacuole are called _________.
  • Incurrent canals
  • Excurrent canals
  • Radiating canals
  • None of the above
A crustose lichen is ____________
  • Graphis
  • Parmelia
  • Cladonia
  • Usnea
Coenogametes occur in ____________.
  • Penicillium
  • Rhizopus
  • Puccinia
  • Ustilago
Fungal spores produced asexually at tops or sides of hyphae are called __________.
  • Zoospores
  • Spores
  • Chlamydospores
  • Conidia
Sexual reproduction with undifferentiated sex organs or vegetative cells is _____________.
  • Spermatisation
  • Parthenogenesis
  • Plasmogamy
  • Somatogamy
Lichen with a branched system but small base is :
  • Fruticose
  • Foliose
  • Crustose
  • Symbiont
Common bread mould is
  • Aspergillus
  • Penicillium
  • Erysiphe
  • Rhizopus
In Rhizopus, we find white cottony mycelium which shows black spots during asexual reproduction. These spots are
  • Zoospores
  • Spores
  • Oospores
  • Sporangia
Reindeer moss is a lichen named _______.
  • Rocella
  • Usnea
  • Parmelia
  • Cladonia
Conjugation fungi are ______________.
  • Oomycetes
  • Zygomycetes
  • Ascomycetes
  • Mushrooms
Soredium is a propagule of __________.
  • Lichens
  • Phycomycetes
  • Zygomycetes
  • Both axcomycetes and basidiomycetes
Generally in laboratory cultures of Rhizopus, there is no formation of zygospore because :
  • There is deficiency of oxygen.
  • There is deficiency of light.
  • Due to the absence of both (+) and (-) strains of mycelia.
  • Presence of (+) and (-) strains of mycelia.
Lichens multiply by 
  • Conidia
  • Oidia
  • Ascopores
  • Soredia
Cladonia rangiferina is,
  • Lichen
  • Alga
  • Fungus
  • Angiosperm
Which of the following characteristics can be related to Archaebacteria?
  • All photosynthetic
  • All fossils
  • All halophiles
  • Oldest living beings
Sambhar Lake is found in
  • Gujarat
  • Andhra Pradesh
  • Madhya Pradesh
  • Rajasthan
  • Kashmir
In majority of lichens, there is association of ___________.
  • Green algae and ascomycetes.
  • Green algae and basidiomycetes.
  • Blue green algae and ascomycetes.
  • Blue green algae and basidiomycetes.
Bacteria that survive high salt concentration and temperature belongs to
  • Cyanobacteria
  • Archaebacteria
  • Eubacteria
  • Actinomycetes
  • All of the above
Cyanobacteria (Nostoc) is
  • Oxygenic with nitrogenase
  • Oxygenic without nitrogenase
  • Non-oxygenic with nitrigenase
  • Non-oxygenic without nitrogenase
Bacteria found in hot acidic aerobic conditions are
  • Halophiles
  • Thermoacidophiles
  • Methanogens
  • Rickettsiae
A fungus which requires only one single host for completion of its life cycle is called
  • Heteroecious
  • Autoecious
  • Heterothallism
  • Heterosporous
Among the following, which organism can be found in extreme temperatures?
  • Fungi
  • Cyanobacteria
  • Eubacteria
  • Archaebacteria
Lichens have an actual relationship of 
  • Parasitism
  • Mutualism
  • Helotism
  • Epiphytism
Organisms which obtain energy by oxidation of reduced inorganic compounds are
  • Photoautotrophs
  • Saprotrophs
  • Coproheterotrophs
  • Chemoheterotrophs
Which one is not correctly matched?
  • Streptomyces - Antibiotic
  • Serratia - Drug addiction
  • Rhizobium - Biofertilizer
  • Spirulina - Single cell protein
In peritrichous bacteria, flagella occur
  • At one end
  • At both ends
  • All over the body
  • Absent
Some protists possess structures for regulation of their water content. They are
  • Nuclei
  • Contractile vacuoles
  • Chromatophores
  • Membranes
Smallest bacterium among the following is
  • Dialister pneumosintes
  • Nitrosomonas
  • Bacillus
  • Spirillum
Lichen growing on wood is called :
  • Corticolous
  • Lignocolous
  • Terricolous
  • Saxicolous
Escherichia coli present in human colon is
  • Parasite
  • Commensal
  • Symbiont
  • Saprophyte
A free living aerobic and non-photosynthetic nitrogen fixing bacterium is
  • Anabaena
  • Clostridium
  • Azotobacter
  • Rhizobium
Bacteria useful in biogas fermentation are
  • Methanogens
  • Halophiles
  • Vibrio
  • Thermoacidophiles
  • Cyanobacteria
A growth promoting rhizobacterium, which produces an iron chelating substance is 
  • Rhizobium japonicum
  • Azospirillium
  • Pseudomonas putida
  • Aspergillus
Murein does not occur in the wall of
  • Diatoms
  • Nostoc
  • Eubacteria
  • Blue green algae
Which statement is true about domain archaea?
  • They differ from both prokaryotes and eukaryotes
  • They completely differ from prokaryotes
  • They resemble eukarya in all aspects
  • They have some novel features absent in other prokaryotes and eukaryotes
Bacteria with group of flagella on both sides are
  • Amphitrichous
  • Cephalotrichous
  • Peritrichous
  • Lophotrichous
Marine protozoans lack contractile vacuole because
  • Their body cannot accommodate it.
  • They are hypo-osmotic to their environment.
  • They are isotonic with their environment.
  • Osmoregulation is done by cell membrane.
Thermococcus, Methanococcus and Methanobacterium exemplify
  • Bacteria whose DNA is relaxed or positively supercoiled but which has a cytoskeleton as well as mitochondria
  • Bacteria that contain a cytoskeleton and ribosome
  • Archaebacteria that contain proteins homologous to eukaryotic core histones
  • Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Archaea differ from eubacteria in one of the following features
  • They have a rigid wall
  • Their cell wall lacks peptidoglycan component
  • They have $$16$$ sRNA
  • They are very ancient
On the basis of rRNA genes, bacteria are divisible into
  • Cyanobacteria and Mycoplasma
  • Actinomycetes and Mycoplasma
  • Bacteria and Archaebacteria
  • Gram $$(+)$$ and Gram $$(-)$$
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