CBSE Questions for Class 11 Medical Biology Biological Classification Quiz 15 - MCQExams.com

A few organisms are known to grow And multiply at a temperature of $$100 - {105^ \circ }C$$ they belong to
  • Thermophilic sulphur bacteria
  • hot spring blue green agae
  • methanogenic archaebacteria
  • Marine archaebacteria
Methanogens and Thermococcus bacteria are similar in the presence of 
  • Red pigment in cell membrane
  • Cyclosis
  • Cell wall being cellulosic
  • Presence of introns
Sexual life cycle of toadstools is different from Albugo in the presence of
  • Flagellated gametes
  • Diplophase
  • (n+n) phase
  • Meiosis
Circular DNA molecule occurs in?
  • Viruses
  • Bacteria, Chloroplasts and mitochondria
  • Bacteria and chloroplasts only
  • Bacteria only
Most of the lichens consists of?
  • Brown algae & higher plants
  • Read algae & ascomycetes
  • Blue green algae & Ascomycetes
  • Blue green algae & basidiomycetes
Lichen and mosses do not grow in :-
  • $$CO_2$$ polluted area
  • $$NO_2$$ polluted area
  • $$CO$$ polluted area
  • $$SO_2$$ polluted area
Lichens are mutualistic relationship between:
  • Fungus and photosynthetic algae
  • Fungus and cyanobacteria
  • Fungus and roots of higher plants
  • Both (A) and (B)
Which of the following represents obligate anaerobes?
  • Spirogyra
  • Pisum sativum
  • Onion
  • Methane bacteria
Spermatization type of sexual reproduction found in-
  • Ustilago
  • Trichoderma
  • Nurospora
  • Yeast
Many blue-green algae occur in thermal springs (hot water springs). The temperature tolerance of these algae have been attributed to their?
  • Mitochondrial structure
  • Importance of homopolar bonds in their proteins
  • Cell wall structure
  • Modern cell organisation
The bacteria which lacks flagella and moves by gliding are included in?
  • Spirochetes
  • Rickettsia
  • Myxobacteria
  • Eubacteria
Which of the following is not true for glycocalyx covering of the bacterial cell?
  • It has inner S-layer and outer mucilage
  • S-layer is mostly made of polypeptides rich in acidic amino acids
  • It protects the cell from desiccation as well as from phagocytes
  • It is essential for the survival of bacteria
The lower thalloid plants like algae and fungi exhibit :
  • Pre-gametic meiosis
  • Post-zygotic meiosis
  • Pre-zygotic meiosis
  • Post-gametic meiosis
A lichen having much branched system of cylindrical or ribbon-like branches but a small thallus, is called as?
  • Foliose lichen
  • Fruticose lichen
  • Crustaceous lichen
  • Thallose lichen
Which is incorrect about E.coil?
  • It is diploid
  • It is found in human intestine
  • Transformation, Transduction, Conjugation can show
  • Can be used in Recombinant DNA technology
The genetic material of $$\phi \times 174$$ is
  • ssDNA
  • ssRNA
  • dsDNA
  • dsRNA
Which one of the following pairs was excluded from Whittaker's five kingdom classification ?
  • Virus and lichens
  • Algae and euglena
  • Lichens and algae
  • Euglena and viruses
BNHS is abbreviation of _____________
  • Banaras Natural history Society
  • Bombay Natural History Society
  • Botanical North Himalayan Survey
  • Biological Natural History Society
Which one of the following statements regarding viruses is not true ?
  • Viruses need living cells to reproduce.
  • All viruses are parasites.
  • Viruses can synthesize their food through photosynthesis.
  • Viruses are similar to chemical substances outside the host.
Whittaker proposed five kingdom classification.
  • True
  • False
Hair-like cilia or whip-like flagella for locomotion and feeding are present in Kingdom:
  • Monera
  • Protista
  • Fungi
  • Plantae
Factors responsible for the rapid spread of bread mould on slices of bread are:
(i) large number of spores
(ii) availability of moisture and nutrients in bread
(iii) presence of tubular branched hypae
(iv) formation of round shaped sporangia
  • (i) and (iii)
  • (ii) and (iv)
  • (i) and (ii)
  • (iii) and (iv)
Contagium vivum fluidum was proposed by-
  • D.J. Ivanowsky
  • M.W. Beijerinek
  • Stanley
  • Robert Hook
Mode of nutrition in yeast, mushroom and bread-mould is saprophytic.
  • True
  • False
Which of the following reproduces by spores?
  • Fungi
  • Virus 
  • Amoeba
  • Hydra
State whether the given statement is true or false:
There is a controversy about viruses whether they are truly alive or not.
  • True
  • False
Identify the fake moss.
  • Polytrichum
  • Sphagnum
  • Cladonia
  • Funaria
Choose the correct options with respect to sexual reproduction in fungi.
Statement 1 - Dikaryotic stage occurs during sexual reproduction in Phycomycetes and Basidiomycetes.
Statement 2 - It is an intermediate stage between plasmogamy and karyogamy.
  • Both statements are correct.
  • Both statements are incorrect.
  • Statement 1 is correct but statement 2 is incorrect.
  • Statement 1 is incorrect but statement 2 is correct.
Study the following characteristics about bacteria and select the correct answer.
1) Bacterial structure is very simple because they are unicellular and prokaryotic.
2) Bacteria as a group show most extensive metabolic activity.
3) Based on shape bacteria are grouped into two categories.
4) Most bacteria do not have cell wall.
  • 1 and 2 are correct, 3 and 4 are incorrect.
  • 3 and 4 are correct, 1 and 2 are incorrect.
  • 1 and 4 are correct, 2 and 3 are incorrect.
  • 2 and 3 are correct, 1 and 4 are incorrect.
Kingdom protista is not considered natural one because
  • It has diverse mode of form, structure and nutrition.
  • Of organisms like slime mould, which are totally different from all other organisms.
  • Its members are from different evolutionary lines.
  • All of the above.
A teacher was explaining about a constant physical contact involving almost equal physiological interdependence in two different thalloid forms. He was trying to explain, which one of the following?
  • Mycorrhizal association
  • Establishment of heterothallism
  • Operation of heterothallism
  • Advent of lichen formation
Yeast like budding of Oidia in Mucor / Rhizopus is called as
  • Palmella
  • Chantransia
  • Torula
  • Gongrosira
Short twisted strands of hyphae which serves as anchors for lichens are
  • Mycelium
  • Rhizines
  • Roots
  • Rhizoids
Parasexuality is involved with
  • Fusion of gamete and protoplast.
  • Fusion of male gamete with secondary nucleus.
  • Fusion of cytoplasm.
  • Fusion of male and female gamete.
Red rot of sugarcane and white rust of radish respectively are caused by
  • Albugo candida and Cercospora
  • Colletotrichum and Fusarium
  • Pythium and Phytophthora
  • Albugo candida and Puccinia graminis
  • Colletotrichum and Albugo candida
Asexual reproduction in fungi takes place by
  • Endospore
  • Gametangia
  • Conidiospore
  • None of the above
Branched chain of lipids occur in the cell membranes of
  • Archaebacteria
  • Mycoplasma
  • Actinomycetes
  • Streptomyces
Zygospore is formed from
  • Gametangial copulation
  • Gametic union
  • Zygote
  • Oogamy
Which of the following induces sexual reproduction in Mucor/Rhizopus?
  • Indole acetic acid
  • Trisporic acid
  • Gibberellic acid
  • Citric acid
Torula stage of Mucor is rich in which of the following medium?
  • Sugar
  • Pesticide
  • Antibiotic
  • All of the above
Which statement about the archaean genome is true? 
  • It is much more similar to the bacterial genome than to eukaryotic genomes.
  • More than half of its genes are never observed in bacteria or eukaryotes.
  • It is much smaller than the bacterial genome.
  • It is housed in the nucleus and no archaea genome has yet been sequenced.
Association between blue green algae and fungi is called as
  • Lichens
  • Xylem
  • Phloem
  • Predation
The symbiotic association between an alga and a fungus is called ________.
  • Moss
  • Lichens
  • Root nodules
  • Rhizopus
In lichens, medulla has
  • Endodermis
  • Hadrome
  • Hypodermis
  • Piliferous layer
Lichens grow at a very slow rate (1 mm per year). In how many years, a lichen matures?
  • 1 - 4 years
  • 4 - 8 years
  • 100 years
  • 20 - 25 years
The three domain system with six kingdom is the latest classification based on 
  • Mitochondrial genes
  • Nuclear genes
  • 16S rRNA gene
  • Chloroplast genes
The asexual spores of fungi produced at terminal ends or at intercalary places during extremely unfavourable conditions are
  • Zoospores
  • Chlamydospores
  • Conidia
  • Oidia
Archaebacteria can adjust to most adverse condition because of 
  • Straight chain lipids
  • Branched lipids of cell membrane
  • Unique glycoproteins
  • Pseudomurein
Spirochaete bacteria are exceptional in showing fast locomotion through thick mucus because of the presence of 
  • Flagellin in flagellum
  • Acidic proteins in flagellum
  • Additional bundles of elastic fibres
  • None of the above
Match the discoverers.
A. Bacteriophage               Adolf Meyr
B. Crystalization of virusStanley
C Reverse transcriptase
Temin and Baltimore
D. TMV4. Felix d'Herelle
  • A- 3, B- 2, C- 1, D- 4
  • A- 4, B- 2, C- 3, D- 1
  • A- 2, B- 3, C- 1, D- 4
  • A- 3, B- 1, C- 2, D- 4
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