Question

Rita and Syan has done a comparative study of cells on basis of nucleus. They observed the cell of bacteria which is having only DNA as the hereditary material. It lies in the cytoplasm and is not arranged in chromatin net. They could not see any nuclear membrane. But when they observed the cell of an algae under compound microscope, they identified a nucleus with a nuclear membrane bounding chromatin material. Find out the true statement according to their study​

Answer 1

Answer:

Chromatin structure is regulated by families of proteins that are able to covalently modify the histones and the DNA, as well as to regulate the spacing of nucleosomes along the DNA. Over the years, these chromatin remodeling factors have been proven to be essential to a variety of processes, including gene expression, DNA replication, and chromosome cohesion. The function of these remodeling factors is regulated by a number of chemical and developmental signals and, in turn, changes in the chromatin structure eventually contribute to the response to changes in the cellular environment. Exciting new research findings by the laboratories of Sharon Dent and Steve Jackson indicate, in two different contexts, that changes in the chromatin structure may, in reverse, signal to intracellular signaling pathways to regulate cell fate. The discoveries clearly challenge our traditional view of ‘epigenetics’, and may have important implications in human health.