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Cell The Unit of Life Test - 70

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Cell The Unit of Life Test - 70
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following statement is INCORRECT regarding biological membrane?
  • Question 2
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    Plastids present in unilluminated cells are
    Solution
    A. Chlorophylls are chlorophyll-containing plastids. These are green coloured.
    B. Chromoplasts are the coloured plastids (other than green colour).
    C. Leucoplasts are the colourless plastids.
    D. Proplastids are the cell organelles in plants, which develop into plastids.
    Hence, plastids present in unilluminated cells are leucoplasts because they are colourless.
    So, the correct answer is 'Leucoplast'.
  • Question 3
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    Choose the correct answers from the alternatives given.
    Which of the following do prokaryotes possess?
    Solution
    The eukaryotic cells have a "true" nucleus containing their DNA, whereas prokaryotic cells do not have a nucleus. Both eukaryotes and prokaryotes contain large RNA/protein structures called ribosomes, which produce protein. But prokaryotic cell does not have mitochondria and Golgi body.
    So the correct option is 'Ribosome'.
  • Question 4
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    Which of the following best distinguishes a prokaryotic cell from a eukaryotic cell?
    Solution
    Prokaryotic and eukaryotic cells both have flagella but prokaryotic cells do not have a membrane-bound nucleus. Eukaryotic cells are generally larger than a prokaryotic cell.
    Hence, the correct answer is 'Prokaryotic cells do not have a membrane-bounded nucleus, but eukaryotic cells do not have such a nucleus'.
  • Question 5
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    Which is not true about prokaryotic cell?
  • Question 6
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    Choose the correct answer from the alternatives given.
    Active transport from outside to inside of molecules across a membrane requires:
    Solution
    Active transport, which is the movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is, from an area of lower concentration to one of higher concentration, requires the assistance of a type of protein called a carrier protein, using energy supplied by ATP. So, the correct option is 'ATP'.
  • Question 7
    1 / -0
    The endoplasmic reticulum is mainly concerned with:
    Solution
    The endoplasmic reticulum is a type of organelle which is found in the eukaryotic cell. It forms a continuous series of flattened sacs within the cytoplasm of eukaryotic cells. The main function of the ER is manufacturing and packaging system. Smooth endoplasmic reticulum (SER) is concerned with the synthesis of Cholesterol. SER is also involved in metabolism.
    Hence, the correct answer is 'Cholesterol synthesis'.
  • Question 8
    1 / -0
    Which one of the following is the smallest organelle in a cell?
    Solution
    Ribosome size:- 20-30nm
    lysosome size:- 100-500 nm
    peroxisome size:-100- 1000nm
    spherosome size:-500-1000nm
    So, the correct option is 'B
  • Question 9
    1 / -0
    Which one of the following organelles is associated with the hydrolysis of food in a cell?
  • Question 10
    1 / -0
    Synthesis of membrane lipids occurs:
    Solution
    The ER and Golgi apparatus together constitute the endomembrane compartment of eukaryotic cells. The endomembrane compartment is a major site of lipid synthesis and the endoplasmic reticulum is where not only lipids are synthesized but membrane-bound proteins are also made.
    Hence, the correct answer is 'In association with endoplasmic reticulum'.
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