Final answer:
The form of DNA found in living cells is B-DNA, which is the common right-handed helical structure of DNA that carries genetic information within the nucleus of eukaryotic cells.
Step-by-step explanation:
The form of DNA found in living cells is B-DNA. This is the most common DNA helix found in nature, with a right-handed spiral structure. DNA is an organic molecule that carries genetic information, is found in the nucleus of eukaryotic cells, and takes the form of chromatin except when the cell divides. The double-helical structure of DNA brought to light by Watson and Crick is indeed B-DNA. During cell division, DNA is replicated and condensed into chromosomes. The B-form of DNA contains two antiparallel strands of nucleotides, which are joined together by hydrogen bonds between the nitrogenous bases.
DNA uses a code that consists of four types of nucleotides; adenine (A), thymine (T), guanine (G), and cytosine (C), with A pairing with T and G pairing with C. The sugar-phosphate backbone forms the structural framework of this helix. Among multiple forms of DNA, including A-DNA, Z-DNA, and more rare configurations, B-DNA is the biologically active form that participates in vital cellular processes.