BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Two
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Eight
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Three
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None of the above
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Detailed explanation-1: -Each nucleotide, in turn, is made up of a nitrogenous base, a pentose sugar, and a phosphate.
Detailed explanation-2: -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-3: -The 5’ and 3’ specifically refer to the 5th and 3rd carbon atoms in the deoxyribose/ribose sugar ring. The phosphate group attached to the 5’ end of one nucleotide and the hydroxyl group at the 3’ end of another nucleotide have the potential to form phospodiester bonds, and hence link adjacent nucleotides.
Detailed explanation-4: -The 3′-end (three prime end) of a strand is so named due to it terminating at the hydroxyl group of the third carbon in the sugar-ring, and is known as the tail end.