What does DNA stand for?

• A. Deoxyribonucleic acid
• B. Deoxyribonucleotide acid
• C. Deoxyribo nucleic acid
• D. Deoxyribonucleaic acid

Answer: (A)

DNA stands for Deoxyribonucleic acid, which is the correct answer. This term specifically describes the molecular structure that carries genetic information in living organisms. "Deoxyribo-" refers to the sugar in the DNA backbone, which is deoxyribose, differentiating it from ribonucleic acid (RNA), which contains ribose. The "nucleic" part indicates that DNA is a nucleic acid, composed of nucleotides that contain a phosphate group, a sugar, and a nitrogenous base. Lastly, "acid" refers to the acidic properties of the phosphate groups in the nucleotides.

The other choices represent variations or incorrect structures. For instance, one mistakenly uses "nucleotide" instead of "nucleic," which alters the meaning. Others contain typos or errors in the structure of the term. Therefore, understanding the full term "Deoxyribonucleic acid" is essential for grasping the role of DNA in genetics and molecular biology.