The following points highlight the three main constituents of nucleus. The constituents are: 1. Nuclear Envelope 2. Nucleolus 3. Nucleoplasm. Constituent # 1. Nuclear Envelope: Under the electron microscope the nuclear envelope appears to consist of two membranes, the outer and the inner nuclear membranes, separated by a perinuclear space of 20 nm (Fig. 2.65). […]
3 Main Constituents of Nucleus | Cell Biology
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Relation among Nucleic Acids, Nucleotides and Nucleosides
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In this article we will discuss about the relations among nucleic acids, nucleotides and nucleosides. Nucleic Acids: These are defined as polynucleotides composed of repeating units ribonucleotides (in RNA) or deoxyribonucleotides (in DNA). The difference between the two structure is that in deoxyribonudeotides there is no-OH group in position 2′. The presence of three esterifiable-OH […]
Top 8 Constituents of an Animal Cell
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The following points highlight the top eight constituents of an animal cell. The constituents are: 1. Cell membrane 2. Nucleus 3. Mitochondria 4. Endoplasmic Reticulum 5. Ribosomes 6. Centrioles 7. Lysosomes 8. Cytosol. Constituents # 1. Cell Membrane: (i) The boundary of every cell has a thin membrane of thickness 75A units (although the thickness […]
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