Question

write the definitions for the following key terms: dna

Explanation:

DNA, or deoxyribonucleic acid, is a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses. It consists of two long polynucleotide chains composed of four types of nucleotide subunits. Each chain is known as a DNA strand. The two strands are held together by hydrogen bonds between the base portions of complementary nucleotides.

Answer:

DNA (deoxyribonucleic acid) is a double - stranded, helical molecule that encodes genetic information. It is composed of nucleotides (adenine, thymine, cytosine, and guanine) and serves as the blueprint for an organism's development, function, and reproduction.