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The genome is the entire complement of DNA in a cell. Some of this exists as unique DNA (most genes). Other parts exist as repeated stretches – maybe 50 to 1,000 copies. Repetitive DNA was originally found by denaturing genomic DNA (making it single-stranded) and then measuring the rate of …

According to Cohn (1964), the term chromatin refers to the Feulgen positive materials observed in the interphase nucleus and later during the division of the cell nucleus. they are long, fine thread-like structures 40 to 150 A0 in diameter.  Ris (1969) has observed that chromatin fibers contain only a single DNA molecule. The term …

Most eukaryotic genes are interrupted by non-coding or non-translatable sequences known as introns. The coding or translatable sequences are known as exons. Such genes are called split genes / interrupted genes. Both intron and exon sequences are transcribed to produce a primary transcript / precursor RNA / pre RNA. What …

In genetics, an operon is a functioning unit of genomic DNA containing a cluster of genes under the control of a single regulatory signal or promoter. The genes are transcribed together into an mRNA strand and either translated together in the cytoplasm or undergo trans-splicing to create monocistronic mRNAs that …

The cytoskeleton (likewise CSK) is a cellular “ scaffolding” or “ skeletal system” included within a cell’s cytoplasm and also is constructed of healthy protein. The cytoskeleton exists in all cells; it was when believed to be special to eukaryotes, yet the current research study has actually recognized the prokaryotic …

In 1898, Camillo Golgi, an Italian cytologist, discovered that when he treated the cells with silver salts, certain peculiar bodies showed up in the cytoplasm. The Camillo Golgi discovered, in 1898, by a Silver-impregnation method, a reticular structure in the nerve cells of the barn owl, which he called the ‘apparato reticular …