Multiple choice Nucleoside is composed of one pentose carbon sugar and a nitogenous base a hexose sugar and a nitogenous base one pentose carbon sugar and two nitrogenous bases two pentose sugars and one base None of these Reveal answer Fill a bubble to check yourself A Correct answer Explanation Nucleosides are composed of a five membered pentose carbon sugar (2-deoxyribose sugar in DNA and ribose in RNA) and a nitrogenous base. Hence, this option is the correct answer.