GENERAL HISTOLOGY

Detailed explanation-1: -DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.

Detailed explanation-2: -The Nucleus The nucleus is the control center of the cell. The nucleus contains nearly all of the DNA in the cell and, with it, the coded instructions for making proteins and other important molecules. In prokaryotic cells, there is no nucleus, and the DNA is found in the cytoplasm.

Detailed explanation-3: -Genes are small sections of DNA within the genome that code for proteins. They contain the instructions for our individual characteristics – like eye and hair colour.

Detailed explanation-4: -Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Detailed explanation-5: -A gene is usually defined as a segment of DNA that contains the instructions for making a particular protein (or a set of closely related proteins).