4. Eukaryotic DNA  is found as chromatin in the nucleus. Concisely describe what is the effect of replacing lysine and arginine in the highly conserved regions of histones with phenyl anime and tyrosine on DNA condensation.

The human genome encodes over 20,000 genes each of the 23 pairs of human chromosomes encodes thousands of genes. The DNA in the nucleus is precisely wound, folded, and compacted into chromosomes so that it will fit into the nucleus. It is also organized so that specific segments can be accessed as needed by a specific cell type

The first level of organization, or packing, is the winding of DNA strands around histone proteins. Histones package and order DNA into structural units called nucleosome complexes, which can control the access of proteins to the DNA regions. Under the electron microscope, this winding of DNA around histone proteins to form nucleosomes looks like small beads on a string. These beads (histone proteins can move along the string (DNA) and change the structure of the molecule

the overall balanced equation

6co2 + 6h2o > c6h12o6 + 6o2

sunlight energy

where: co2 = carbon dioxide

h2o = water

light energy is required

c6h12o6 = glucose

o2 = oxygen

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.