(a) Expand DNA and RNA. (b) In which part of the cell it is found? State its function. (c) In which form is DNA present in (1) dividing cell (2) non-dividing cell?

(a) DNA (Deoxyribonucleic Acid) is a group of molecules that is responsible for carrying and transmitting the hereditary materials or the genetic instructions from parents to offsprings.

(b) RNA is a ribonucleic acid that helps in the synthesis of proteins in our body. This nucleic acid is responsible for the production of new cells in the human body.

(c) DNA is present in the following form:

(1) In dividing cells: The DNA coils up, forming chromosomes, and each chromosome has a single molecule of DNA in it.

(2) In non-dividing cells, DNA is present in free form, called chromatin.

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