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Biological Classification Test - 62

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Biological Classification Test - 62
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  • Question 1
    1 / -0
    Protozoan protists are differentiated on the basis of
    Solution
    • Phylum protozoa is classified on the basis of locomotory organelles. It is classified into four groups:-
    1. Mastigophora (Zooflagellata): They possess flagella for locomotion.
    2. Sarcodina (Rhizopoda): They develop pseudopodia which are temporary protoplasmic outgrowths.
    3. Sporozoa: All sporozoans are endoparasites. Locomotory organelles are absent. 
    4. Ciliata: They develop a number of cilia during a part or whole of the life cycle. 
  • Question 2
    1 / -0
    Bacteria are examples of
    Solution
    Prokaryotes are unicellular organisms. They have a cell wall. They have no membrane-bound organelles such as mitochondria, Golgi complex. They lack a true nucleus. Instead, they have nucleoid, a genetic material without a nuclear membrane. Examples include Bacteria, cyanophyceae (Blue-Green algae), Nitrogen-fixing organisms etc.
    Thus, the correct answer is 'Prokaryotic cells.'
  • Question 3
    1 / -0
    Oriental sore is caused by
    Solution
    Cutaneous leishmaniasis is characterized by ulcerative skin lesions and occasionally nodular, psoriasiform, and verrucous lesions. Old world cutaneous leishmaniasis (oriental sore) is caused mainly by L. tropica. Leishmania sps is a protozoan.
    So, the correct answer is 'Protozoan'

  • Question 4
    1 / -0
    Which of the following is not a moneran?
    Solution
    Monerans are prokaryotic unicellular organisms. Anabaena, nitrogen-fixing bacteria and blue-green algae are monerans. Amoeba is a protozoan.
    So, the correct answer is option D.
  • Question 5
    1 / -0
    The bacterium that helps in breakdown of cellulose in the rumen of cattle is ______________.
    Solution
    In the rumen of cattle methanogens act on the food ( act on carbon atoms present in it ) eaten by cattles and produce methane gas via normal fermentation process. This gas is released into the atmosphere when they exhale
  • Question 6
    1 / -0
    Match and find the correct combination
    III
    (a)HIV(i)Ghost
    (b)Pilus(ii)Prophage
    (c)Virus(iii)Retro viridae
    (d)Lysogeny(iv)Donor
    (v)Polyhedral virus
  • Question 7
    1 / -0
    In which bacteria, lipopolysaccharide is found as the main surface antigen?
    Solution
    Lipopolysaccharides (LPS), also known as lipoglycans and endotoxins are large molecules consisting of a lipid and a polysaccharide composed of O-antigen, outer core and inner core joined by a covalent bond they are found in the outer membrane of Gram-negative bacteria.
  • Question 8
    1 / -0
    Which one  is not correctly matched?
    Solution
    Nitrogen fixation is a process by which atmospheric nitrogen is converted into ammonium compound and is made available to plants. Azotobacter is a free living nitrogen fixing bacteria. Streptococcus thermophilus is widely used in the formation of Yogurt. It break down the lactose present in the milk. Hence, it is useful for lactose-intolerant people. Chlorobium is a genus of green sulfur bacteria. It is able to produce its own food by the process of photosynthesis. Streptomyces rimosus is a gram positive bacteria which produces antibiotics like Chloramphenicol.
    Thus, the correct answer is 'Streptomyces rimosus - Chloromycetin.'
  • Question 9
    1 / -0
    Organisms called methanogens are most abundant in
    Solution
    Methanogen belongs to Archaebacteria group. They are capable of producing methane gas or marshy gas or biogas. They produces methane gas in marshy areas. They are most abundant in marshy areas and cattle yard where cow sheds are present. The methange gas produces a peculiar odour in these areas.
    Thus, the correct answer is 'Cattle yard.'
  • Question 10
    1 / -0
    Which of the following is not true for Nostoc?
    Solution
    Nostoc is a genus of filamentous Blue green algae or Cyanobacteria. They are microscopic in nature. They are unicellular prokaryotic organism. They are autotrophic organism. They are capable of synthesizing their own food by the process of photosynthesis. They have ability to fix atmospheric nitrogen. 
    Thus, the correct answer is 'Macroscopic.'
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