In addition to organization of DNA in prokaryotes and lower eukaryotes, in eukaryotes the DNA helix is highly organised into the well-defined DNA-protein complex termed as nucleosomes. Among the proteins the most prominent are the histones. The histones are small and basic proteins rich in amino acids such as lysine and/or arginine. Almost in all […]
Organization of DNA in Eukaryotic Cell | Biochemistry
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Top 3 Filamentous Structures of Eukaryotic Cell
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The following points highlight the top three filamentous structures of eukaryotic cell. The filamentous structures are: 1. Actin Filaments 2. Microtubules 3. Intermediate Filaments. Filamentous Structure # 1. Actin Filaments: a. The G-actin protein of non-muscle cells has a molecular weight of about 43,000 and contains N-methylhistidyl residues. b. This actin spontaneously polymerizes in the […]
Hypothesis and the Origin of Eukaryotic Cell | Biology
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The following points highlight the top six types of hypothesis with respect to origin of eukaryotic cell. The hypothesis are: 1. Independent Hypothesis 2. Endogenous Theory (Filiation Theory) 3. Chimera Hypothesis 4. Endosymbiotic Theory 5. Serial Endosymbiotic Theory (Set) 6. Syntrophy Hypothesis. Type # 1. Independent Hypothesis: The unique nature of the eukaryotic nucleus with […]
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