BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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nitrogen base, phosphate group, and pentose sugar
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pentose sugar, nitrogen base
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nitrogen base and a phosphate group
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DNA, phosphate group, monosaccharide
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Detailed explanation-1: -A nucleoside consists of a pentose sugar to which a nitrogen base is attached by a glycosidic bond. The sugar may be ribose or deoxyribose. The nitrogenous bases are purines or pyrimidines. Nitrogen base is attached to the C-1 of the pentose sugar.
Detailed explanation-2: -Nucleosides consist of a purine or a pyrimidine base and a ribose or a deoxyribose sugar connected via a -glycosidic linkage. These compounds are associated with structures of RNA (ribose sugars) and DNA (deoxyribose sugars).
Detailed explanation-3: -The pentose sugar contains five carbon atoms. Each carbon atom of the sugar molecule are numbered as 1′, 2′, 3′, 4′, and 5′ (1′ is read as “one prime”). The two main functional groups that are attached to the sugar are often named in reference to the carbon to whch they are bound.
Detailed explanation-4: -A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base.
Detailed explanation-5: -A nucleotide is the basic structural unit and building block for DNA. A nucleotide has 3 components-a nitrogenous base, pentose sugar and a phosphate group.