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Cell The Unit of Life Test - 15

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Cell The Unit of Life Test - 15
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Weekly Quiz Competition
  • Question 1
    1 / -0
    SER and RER can be distinguished with it's presence in
    Solution
    The endoplasmic reticulum is a network of membranous sacs like structure, such as cisterns, vesicles, and narrow tubules. On the basis of presence or absence of ribosomes on it's surface, these are two types-
    Rough endoplasmic reticulum (RER) with ribosomes on it's surface prominently sites where the protein is synthesizing.Smooth endoplasmic reticulum (SER) lack ribosomes and the sites for synthesis of cholesterol and lipids. Thus the correct answer is option D.
  • Question 2
    1 / -0
    Which organelle of the cell is called the power house of the cell?
    Solution
    Mitochondria synthesize energy-rich molecules that is ATP. They are so-called because they carry out the process of aerobic respiration and generate the energy molecules (ATP or Adenosine Triphosphate) for cell operation. Therefore they are known as the powerhouse of the cell.
    Hence, option C is correct.
  • Question 3
    1 / -0
    Organelles which are regarded as 'power house' of the cell and in which the oxidative reactions of the respiratory process takes place are
    Solution
    Glycolysis occurs in cytoplasm and converts glucose into two molecules of pyruvic acids. Pyruvic acid molecules are oxidized completely inside the mitochondria in Kreb's cycle and ATP is produced. This production of ATP is called oxidative phosphorylation because it involves oxidation of food, i.e., glucose and hence, mitochondria is called as power house of the cell.
  • Question 4
    1 / -0
    Who first introduced the term 'mitochondria ?
    Solution
    Mitochondria was discovered by the Kolliker while study insect muscle cells but Carl Benda coined the word mitochondria in 1898. Thus, the correct answer is option C.
  • Question 5
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    Which of the following is a prokaryote?
    Solution
    Bacteria are prokaryotic, single-celled organisms, which, belong to the kingdom Monera. The bacterial cell has coiled DNA in a region called nucleoid and is devoid of membrane-bounded organelles. Bacteria do not have an organized cellular structure.
    Amoeba is a unicellular eukaryote and belongs to kingdom Protista.
    Spirogyra and Chlamydomonas are green algae and belong to the kingdom Plantae. They have a complex cellular structure with membrane-bounded organelles.
    So, the correct answer is option C.
  • Question 6
    1 / -0
    Intracellular compartments are not found in the cells of
    Solution
    Intracellular compartments are the membrane-bounded organelles present in the cytosol and separated from the extracellular compartment by the cell membrane. Prokaryotic cells are the primitive unicellular organism which has disorganized nucleus without a nuclear membrane and no membrane-bounded organelles. 
    So, the correct answer is option B.
  • Question 7
    1 / -0
    Mitochondria are non-existent in
    Solution
    The prokaryotes are the single-celled living organism that lacks membrane-bound nucleus and organelle e.g., bacteria. Mitochondria is the double membrane-bound organelle and thus it is absent in bacteria.
  • Question 8
    1 / -0
    Which structure is present in both prokaryotic and eukaryotic cells?
    Solution
    Unlike the eukaryotes, the prokaryotic organisms are devoid of membrane-bound organelles. Nucleus, chloroplast and mitochondria are membrane bound sub-cellular structures found in the eukaryotes only. Cell wall is found in the plants as well as bacterial cells, which are prokaryotes.
    Hence the correct option is A.
  • Question 9
    1 / -0
    Which one of the following is a prokaryote?
    Solution
    Salmonella is a bacteria which has unorganised nucleus without membrane and hence, it is a prokaryote. A bacteriophage is a virus and non-living particle. Agaricus is a fungus. Green algae are plants.
    So, the correct answer is option B.
  • Question 10
    1 / -0
    Single membrane bound organelles are
    Solution
    Eukaryotic cell has several membrane bound cell organelles. These cell organelles can be bound by a single or double membrane. Nucleus, plastids and mitochondria are bounded by double membrane whereas lysosomes, sphaerosome, glyoxysomes are bounded by a single membrane. Ribosomes are naked particles not bounded by any membrane. Thus, the correct answer is option D.
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