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The Fundamental Unit of Life Test - 23

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The Fundamental Unit of Life Test - 23
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  • Question 1
    1 / -0
    Which of the following are amoeboid in shape?
  • Question 2
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    The number of daughter cells formed after mitosis is
    Solution
    The process of cell division by which most of the cells divide for growth is called mitosis. In this process, each cell called mother cell divides to form two identical daughter cells. The daughter cells have the same number of chromosomes as mother cell. It helps in growth and repair of tissues in organisms.
    Hence the correct option is B.
  • Question 3
    1 / -0
    A nervous system is comprised of ________ cells.
    Solution
    The nervous system is comprised of nerve cells which help in control and coordination in the body.
    The correct option is D.
  • Question 4
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    A spherical shaped structure present in the centre of an animal cell is known as_____.
    Solution
    • The nucleus is the centrally located small spherical structure in an animal cell. It regulates and coordinates various activities of the cell. 
    • The cytoplasm is the semi-liquid, colorless, and translucent part of the cell. It is found between the cell membrane and nucleus.
    • A vacuole is found in the cytoplasm and helps to transport a number of ions against the concentration gradient, excretion, etc. It may or may not be present in an animal cell, if present is very small.
    • Plastid is the largest cell organelle. Animal cell lacks plastids. They bear some specific pigments and imparting specific colours to the plant.
    Thus, Option B is correct.
  • Question 5
    1 / -0
    What makes the eukaryotic genome different from the prokaryotic genome?
    Solution
    Unlike the prokaryotic cells which have a single circular naked DNA without any histones (only a few exceptions exist), the eukaryotic cells have a linear DNA which exists in the form of several chromosomes. The DNA is arranged in the form of chromosomes; It starts with wrapping the DNA around histone proteins which are further folded in an ordered fashion to form a compact structure which is the chromosome. Thus, the correct option is D.
  • Question 6
    1 / -0
    How many number of mitotic divisions required for the formation of 128 cells?
    Solution
    Each mother cell produces two daughter cells after a mitotic division. By using, 2$$^n $$ we can find out the number of mitotic divisions.
    2$$^n $$ = 128
    $$n$$ = 7
    So, the correct answer is option C.
  • Question 7
    1 / -0
    Food is converted to energy in:
    Solution
    • Mitochondria are the sites of cellular respiration. They bring about the stepwise oxidation of food to release energy. The released energy is used for various energy-requiring activities inside the cell. Thus, they are also known as the powerhouses of a cell. 
    • Chloroplasts are present in plant cells. The pigment chlorophyll present inside the chloroplast helps in the synthesis of food, by the process called photosynthesis.
    • The nucleus is the main control center of the cell, which regulates the activities of the cell. It contains genes which are the units of inheritance. 
    So, the correct answer is option C. 
  • Question 8
    1 / -0
    If two solutions have the same concentrations, they are said to be:
    Solution
    Isotonic means two solutions having the same concentration which means there are an equal number of solute molecules and an equal number of solvent molecules. Thus the correct answer is option C. 
  • Question 9
    1 / -0
    Osmosis is the diffusion of:
    Solution
    Osmosis is the diffusion of water from a hypotonic solution into a hypertonic solution across a selectively permeable membrane.
    Thus, the correct answer is option C.
  • Question 10
    1 / -0
    In which type of cell division two identical daughter cells are formed?
    Solution
    • Mitosis creates two identical daughter cells each of which contains the same number of chromosomes as their parent cell.
    • Meiosis gives rise to four daughter cells, each of which has half the number of chromosomes than parent cells.
    • In amitosis, although only two daughter cells are produced, they are not always identical to each other as genetic material (Chromosomal or DNA material) is unequally distributed between the two newly formed cells. 

    So the correct answer is option A.
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