Answer:
The correct answer will be option- the nucleic acid strands in a DNA molecule are oriented antiparallel to each other, meaning they run in opposite directions.
Explanation:
Deoxyribose nucleic acid or DNA is the molecule which acts as the genetic material of the organisms.
The structure of DNA suggests that DNA molecule is made of two strands of nucleotides which are oriented in the opposite direction with respect to each other.
Each nucleotide is composed of a five-carbon sugar called deoxyribose bonded with a phosphate group via ester bond and four types of nitrogenous bases bonded to complementary bases via hydrogen bond.
The sugar-phosphate backbone runs in the opposite direction with a free 5' carbon atom of phosphate group end a 3' OH group of sugar. The orientation of strands is that one strand run from 5' to 3' direction while another runs from 3' to 5' direction.
Thus, the selected option is the correct answer.
