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Whenever a chromosome is replicated the replication machinery passes by the nucleosomes without deleting the histones from the DNA. How this happens is since not fully understood. Together of the daughter DNA molecules in which result from replication have old histones bound to them but overall, as the amount of DNA has now doubled more histones are needed to package the DNA rightly into nucleosomes. Not surprisingly, therefore, the S phase of the cell cycle is also the time when enormous amounts of histones are synthesized.
figure: Replication of telomeric DNA. Telomerase has a bound RNA molecule that is used as template to direct DNA synthesis and as extension of the ends of chromosomal DNA.
Q. Define Osseointegration from patients, microscopic and biomechanical points of view. a) From the view of the patient . An implant fixture is osseointegrated if it provid
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Explain about the Brownian ratchets and molecular motors ? How work is carried out by molecules within biological cells is essential to understanding how cells function. A clue
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Q. How do biodiversity, the total number of living beings and the biomass respectively vary during the ecological succession? The Biodiversity, the biomass of an ecosystem and
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