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NUCLEOLUS
(1) Fibrous part - Central part of nucleolus composed of fibers called nucleonema. Nucleonema mainly composed of r-DNA and proteins.
(2) Granular part - Peripheral part of nucleolus composed of granules (r-RNA + proteins) which represents maturing ribosomes.
(3) Amorphous matrix or Pars amorpha - A proteinaceous matrix which contains both fibers and granules. r-RNA 5.8s, 18s and 28s are synthesized in nucleolus. Ribosomal protein is synthesized in cytoplasm. Organisation of r-RNA and protein to form ribosomes occurs in nucleolus. Completely formed ribosomes then move to cytoplasm through nuclear pores. Nucleolus also play important role in initiation of cell division.
Properties of Receptors The receptors collect information concerning the change in the environment such as temperature, illumination etc. In lower animals, sensory perception
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Define Observation for Benedict Test - Carbohydrates? An insoluble reddish brown precipitate of cuprous oxide will be obtained. This is similar to Fehling's test. The reddis
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What are the physiological changes during pregnancy
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