CBSE Questions for Class 11 Medical Biology Biological Classification Quiz 16 - MCQExams.com

Phyllosphere bacteria are present around the
  • Leaf surface of desert plants
  • Leaf surface of tropical rain forest plants
  • Shoot surface
  • Root of higher plants
Saprolegnia is a best example for demonstrating
  • Heterospory
  • Dichogamy
  • Herkogamy
  • Diplanetism
Photosynthetic bacteria have
  • Photo system I
  • Photo system II
  • Both A and B
  • None of these
All are true about Shigella sonnei except
  • It causes the mildest form of dysentery.
  • It causes enteric fever.
  • It is a late lactose fermenter.
  • It is motile.
In which group of fungi, the zoospores possess two oppositely directed flagella, one whiplash and another tinsel type?
  • Ascomycetes
  • Zygomycetes
  • Oomycetes
  • Deuteromycetes
Pick the correct match for structure of bacteria.
149308_f183cd575da24a4e8ecef56048bcd8e2.png
  • A- Flagellum, B- Ribosome, C - Plasma membrane, D- Pili, E- Nucleoid region, F- Capsule, G- Cytoplasm, H- Plasmid
  • A- Flagellum, B- Ribosome, C- Mitochondria, D- Plasma membrane, E- Pili, F- Capsule, G- Golgi, H- Plasmid
  • A- Flagellum B- ER, C- Ribosome, D- Plasma membrane, E- Pili, F- Capsule, G- Golgi, H- Plasmid
  • A- Flagellum, B- Ribosome, C- Cytoplasm, D- Pili, E- DNA, F- Capsule, G- Plasma membrane, H- Plasmid
Which one of these species has one meganucleus and two micronuclei?
  • Paramecium aurelia
  • Paramecium bursaria
  • Paramecium caudatum
  • Paramecium multimicronucleatum
Halophilic bacteria are able to survive in salt rich media due to 
  • Accumulation of halogens
  • Bacteriorhodopsin
  • Enzymes active at high levels of $$KCI$$ or $$NaCI$$
  • All of the above
Lichens are pioneer vegetation in
  • Xerosere
  • Hydroponics
  • Marine life
  • Hydrosere
The discovery of virus has placed the problem of the origin of life in new light and it is believed that higher forms of life have descended from
  • Parasitic viruses
  • Free living viruses
  • All kind of viruses
  • None of the above
Match column I and II and select the correct option. 
  List I  List II
 A Aerobic 1 Frankia
 BNon-photosynthetic bacteria
 2 Azospirillum
 C Casuarina 3 Clostridium
 D Tropical grasses 4 Azotobacter
  • A- 2, B- 3, C- 1, D- 4
  • A- 1, B- 2, C- 3, D- 4
  • A- 2, B- 3, C- 4, D- 1
  • A- 4, B- 3, C- 2, D- 1
A bacterium is capable of withstanding extreme heat, dryness and toxic chemicals. This indicates that it is probably able to form
  • A thick peptidoglycan wall
  • Endospores
  • Endotoxins
  • Buds
The classification of Linnaeus was mainly based on
  • Sepals
  • Stem
  • Petals
  • Stamens
In the following table, identify the correct matching of the crop, its disease and the corresponding pathogen.
Crop       DiseasePathogen
A.Citrus  -  Canker1.Xanthomonas axonopodis
B.Potato  -   Late blight2. Fusarium udum
C.Brinjal  -   Root knot         3.Meloidogyne incognita
D.Pigeon pea -  Seed gall4. Phytophthora infestans;
  • A- 1, B- 2, C- 3, D- 4
  • A- 1, B- 4, C- 3, D- 2
  • A- 4, B- 3, C- 2, D- 1
  • A- 3, B- 4, C- 1, D- 2
Bacteria can not survive a highly salted pickle, because
  • They become plasmolysed and killed.
  • Salt inhibit respiration.
  • Pickle do not contain nutrients necessary for bacteria.
  • Bacteria do not get light for photosynthesis.
Archaebacterial cell lacks
  • Peptidoglycan
  • DNA
  • Ribosomes
  • Branched chain lipids
Thin thread like bacteria, which appears like fungal hyphae are known as
  • Spirillum
  • Bacillus
  • Actinomycetes
  • Cocci
Adhesive pad of fungi penetrate the host with the help of
  • Mechanical pressure and Enzymes
  • Hooke and Suckers
  • Softening by enzyme
  • Only by mechanical pressure
Which of the following plants can carry out photosynthesis even at $$-20^{\circ}C$$ or below freezing point?
  • Palms
  • Marine algae
  • Diatoms
  • Lichens
CJD caused by
  • Viroid
  • Mycoplasma
  • Virus
  • Prion
Fungi that requires two different hosts to complete its life cycle is called as
  • Homothallic
  • Heterothallic
  • Heteroecious
  • Autoecious
Lichens are well known combination of an alga and a fungus where fungus has 
  • An epiphytic relationship with the alga.
  • A parasitic relationship with the alga.
  • A symbiotic relationship with the alga.
  • A saprophytic relationship with the alga.
Some hyperthermophilic organisms that grow in highly acidic (pH = 2) habitats, belong to which of the following two groups?
  • Liverworts and yeasts
  • Eubaeteria and archaeabacteria
  • Cyanobacteria and diatoms
  • Protists and mosses
A semi-parasite relationship between the algal and fungal components of a lichen is termed as
  • Helotism
  • Predation
  • Parasitism
  • None of the above
A lichen having much branched system of cylindrical or ribbon-like branches but a small thallus, is called as
  • Foliose lichen
  • Fruticose lichen
  • Crsutaceous lichen
  • Thallose lichen
Why are protozoans placed in kingdom protista and not in kingdom animalia?
  • Protozoans have autotrophic mode of nutrition.
  • Protozoans are unicellular and have heterotrophic mode of nutrition.
  • Both A and B.
  • None of the above.
Lichen is a pioneer vegetation of
  • Hydrosere
  • Psammosere
  • Lithosere
  • Halosere
Select the true statements out of the following.
  • The lichens are curious because they are composite or dual organism.
  • The apothecium consists of the fungal component only (e.g. Cladonia), such apothecia are called lecideine type.
  •  Parmelia, Physica, Lecanora etc. have more highly developed apothecia called Lecanorine type in which both fungal and algal components are present.
  • All of the above.
Lichens multiply by
  • Soredia formation
  • Bud formation
  • Conidia formation
  • Oidia formation
Why are protozoans regarded as primitive animals?
  • They are unicellular and microscopic.
  • Tissues, organs and organ systems are not developed in them.
  • Both A and B.
  • None of these.
Lichen do not grow in cities because of the 
  • Absence of the right type of algae and fungi
  • Lack of moisture
  • SO$$_2$$ pollution
  • Absence of natural habitats
Give two examples of unicellular organisms.
  • Hydra, Chara
  • Amoeba, Paramecium
  • Marchantia, Riccia
  • None of these
Puccinia infection from Barberry to wheat occurs through
  • Teleutospores
  • Uredospores
  • Aeciospores
  • Pycnospores
Which class of protozoa is totally parasitic?
  • Flagellata
  • Sporozoa
  • Rhizopda
  • Ciliate
Which of the following is unicellular?
  • Euglena
  • Pinus
  • Moss
  • Rhizopus
Cell of Amoeba is
  • Spindle shaped
  • Broad shaped
  • Spherical in shape
  • Indefinite in shape
The guts of cow and buffalo possess 
  • Methanogens
  • Cyanobacteria
  • Fucus species
  • Chlorella species
The correct condition among the following with reference to sexual reproduction in Rhizopus stolonifer is
  • $$'+' \times '-' =$$ zygospore
  • $$'+' \times '-' =$$ No zygospore
  • $$'-' \times '-' =$$ zygospore
  • $$'+' \times '+' =$$ zygospore
Protistan algae include the members like___________________-
  • Diatoms
  • Dinoflagellates
  • Euglenoids
  • All of the above
It is difficult to make anti-viral drugs because
  • Viruses use the host cell as machinery to grow and divide.
  • Viruses are surrounded by protein coat.
  • Viruses are one of the borderline of living and non-living state.
  • Viruses are very small in size.
Match the following lists.
List-IList-II
HIVI. Host
PilusII. Prophage
Virus penetrationIII. Retroviridae
LysogenyIV. Polyhedral virus

  • 1- i, 2- ii, 3- iii, 4- iv
  • 1- i, 2- iv, 3- iii, 4- ii
  • 1- iv, 2- iii, 3- ii, 4- i
  • 1- iii, 2- iv, 3- i, 4- ii
Lichens are important in the studies on atmospheric pollution because they
  • Can cause eutrophication
  • Efficiently purify the atmosphere
  • Are very sensitive to pollutants like $$SO_2$$
  • None of the above
Bacterial ribosomes are found
  • In the cytoplasm.
  • On nuclear memberane.
  • On the cell wall.
  • On endoplasmic reticulum.
Methanogens can be found 
  • In swamps
  • In a cow's stomach
  • In marshes
  • All of the above
  • None of the above
Bovine spongiform encephalopathy is a disease caused by prions in 
  • Potato
  • Man
  • Sheep
  • Cow
Thermococcus, Methanococcus and Methanobacterium are groups of
  • Bacteria containing a cytoskeleton and all membrane bound organelles
  • Archaebacteria with peptidoglycan in their cell wall
  • Archaebacteria that consists of protein homologous to eukaryotic core histones
  • Most advanced type of bacteria
In order to attack a host cell
  • The virus must have the DNA or RNA key sequence to enter the host cell.
  • The virus must have the enzymes to cause the host cell to burst so that the host cell may be used as raw materials.
  • The virus must have the proper enzyme to puncture the membrane of the host cell.
  • The virus must have a particular shape that will match up with the proteins on the surface of the host cell.
  • The viral DNA or RNA must have a sequence that is recognized by the ribosomes of the host cell.
An example of tumour inducing RNA virus is
  • Simian Virus $$40$$
  • Herpes virus
  • Adeno virus
  • Rous Sarcoma
The absence of cell wall but the presence of Golgi body and ribosomes in a unicellular organism indicates that it belongs to
  • Animalia
  • Eubacteria
  • Fungi
  • Protista
  • Archaea
Which of the following cannot be grown on artificial culture medium?
  • Escherichia coli
  • TMV
  • Aspergillus
  • Yeast
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 11 Medical Biology Quiz Questions and Answers