Histones are a family of basic proteins that associate with DNA in the nucleus and help condense it into chromatin. Nuclear DNA does not appear in free linear strands; it is highly condensed and wrapped around histones in order to fit inside of the nucleus and take part in the formation of chromosomes.he beads are called nucleosomes. Each nucleosome is made of DNA wrapped around eight histone proteins that function like a spool and are called a histone octamer.
The preparation of a ... The purpose of making a smear is to fix the bacteria onto the slide and to prevent the sample from being lost ... ... fixation is a critical step in the preparation of ... Heat fixation: After a smear has dried at ... are rarely used alone for fixing blocks unless ...
Purpose of the Thermocouple. A thermocouple is a device for measuring temperature. In a furnace, it is an important safety device. When a furnace turns on, it ignites the gas in one of two ways. Either an igniter creates a spark to light the gas, or else a pilot light which is always left on lights it.urpose of the Thermocouple. A thermocouple is a device for measuring temperature. In a furnace, it is an important safety device. When a furnace turns on, it ignites the gas in one of two ways. Either an igniter creates a spark to light the gas, or else a pilot light which is always left on lights it.