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Cell The Unit of Life Test - 52

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Cell The Unit of Life Test - 52
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  • Question 1
    1 / -0
    Lipid and hormone synthesis takes place in
    Solution
    The endoplasmic reticulum is of 2 types - rough and smooth. The rough ER is responsible for protein synthesis. The smooth ER is devoid of ribosomes and responsible for fats or lipids metabolism, lipids and steroid hormone production.
    So, the correct answer is option D.
  • Question 2
    1 / -0
    Prokaryotes contain
    Solution
    Prokaryotic cells are the primitive cells which lack membrane-bound organelles and nucleus. Ribosomes are the smallest cell organelles which are not bounded by the membrane and thus, found in prokaryotic cells. Ribosome plays a vital role in protein synthesis as they consist of protein and RNA. They are located freely in the cytoplasm and attached to the rough endoplasmic reticulum. Prokaryotic ribosomes are the 70s. So, the correct answer is option C.
  • Question 3
    1 / -0
    Choose the incorrect statement about cell structure.
    Solution
    Ribosomes are small organelles and are the site of protein synthesis. 
    Ribosomes are found in all cells. 
    Mitochondria are where energy from organic compounds is used to make ATP.
  • Question 4
    1 / -0
    The highest number of mitochondria are found in 
    Solution
    Mitochondria are filament-like cytoplasmic organelles which are found in all types of cells except prokaryotic cells and red blood cells of mammals. The cells with extensive metabolic activities will have a greater number of mitochondria. The number of mitochondria are high in muscles. because of greater activity and energy requirement of the muscle. Thus option D is the correct answer.
  • Question 5
    1 / -0
    The codes for the specific proteins produced by a cell lies in the ________.
  • Question 6
    1 / -0
    Which of the follwing are membrane bound structures?
    I. Ribosome
    II. Plasma membrane
    III. Endoplasmic reticulum
    IV. Golgi body
    Solution
    organelles are the membrane-bound structure embedded in the cytoplasm. Some organelles, which are not membrane bound to like the ribosome. The majority of the organelles like ER, Golgi body, lysosomes all have membranes.
    So, the correct answer is option E.
  • Question 7
    1 / -0
    Muscle cells contain large number of
    Solution
    Muscles cells contain a large number of mitochondria because muscle tissues require a large amount of energy for movement and especially during exercise. Since ATP is produced by mitochondria, muscles cells have a large number of mitochondria to fulfill the energy requirements.
  • Question 8
    1 / -0
    Which of these cell organelles stores starch grains and oil drops?
    Solution
    • Leucoplast - These are colourless organelle. in plant cells that is mainly used for starch or oil.
    • Mitochondria - It is a cell organelle that is used for the generation of energy for the cell.
    • Chloroplast - The organelle that contains chlorophyll, used for the synthesis of food(Glucose) in plant cells.
    • Ribosome - It is the organelle which is used for translation i.e., sythesis of protein from mRNA.
    So, the correct answer is (B).
  • Question 9
    1 / -0
    Which of the following is true of the colourless plastid and its function?
    Solution
    Plastid is the organelle that found only in plant cells. The three types of plastids are green plastid, nongreen chromoplast, and leucoplasts. The leucoplasts are the non-colored plastid which is used for the storage of the food. The oil, starch, and fats are generally stored in these plastids.
    Thus, the correct answer is option D. 
  • Question 10
    1 / -0
    Identify the function of ribosome.
    Solution
    The smallest organelle in the cell is the ribosome. The diameter of the ribosome is about 20 nm. It is made up of small and large subunits. It is the site for the manufacture of proteins within the cell. The small subunit is involved in reading the codons on the mRNA and the large subunit helps in the attachment of the amino acids to form a linear chain of the protein. 
    Thus, the correct answer is option D.
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