CELL STRUCTURES AND FUNCTION
BIO MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sugar
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phosphate
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nitrogen base
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phospholipid
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Detailed explanation-1: -Nucleotides that make the DNA strands contain deoxyribose sugar, phospate molecule and one nitrogenous base out of adenine, guanine, thymine and cytosine. Uracil is never a part of nucleotide of DNA.
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: -DNA nucleotides do not contain ribose sugar. Hence, ribose, thymine, and a phosphate group cannot represent a DNA nucleotide. Hence, option d is incorrect. DNA nucleotides comprise a deoxyribose sugar, any one of the nitrogenous bases-adenine, guanine, cytosine, or thymine and a phosphate group.
Detailed explanation-4: -Molecules called nucleotides, on opposite strands of the DNA double helix, that form chemical bonds with one another. These chemical bonds act like rungs in a ladder and help hold the two strands of DNA together. There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T).
Detailed explanation-5: -explanation:Nucleotides contain three things; A Nitogenous base, A 5 carbon sugar and a Phosphate group.