JCECE Medical JCECE Medical Solved Paper-2005

  • question_answer
    Cellular respiration occurs in:

    A)  chloroplast    

    B)  Golgi bodies

    C)  mitochondria  

    D)  nucleus

    Correct Answer: C

    Solution :

     Mitochondria are the seat for cellular respiration and produce energy in the form of ATP or (cellular currency), utilized for cellular functions. The respiratory assemblies known as oxysomes or \[{{\text{F}}_{\text{1}}}\]particles are located in the   inner membrane of mitochondria. These particles contains a ATPase     enzyme     involved     in oxidative-phosphbrylation. Due to production of energy, mitochondria are also called, 'Power houses? of the cell. Chloroplast are the important and common plastids found in all photosynthesizing cell except prokaryotes. It is composed of proteins (35-55%), lipids (20-30%), chlorophylls (9%), carbohydrates (3-7%), carotenoids (4-5%), RNA and DNA. Chloroplast has no role in  respiration. Golgi bodies also known as lipochondrion is composed of 60% protein and 40% lipids and polysaccharides. It functions in transportation and secretion of certain materials like proteins  and polysaccharides. It stores the secretory products, give rise to lysosomes, vacuoles and in formation of acrosome in sperm. Unlike mitochondria, Golgi bodies don't have any respiratory structures or enzymes. Nucleus is the largest organelle which regulates growth and reproduction of cell or the controller of all the activities of cell.


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