THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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deoxyribose
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nitrogenous base
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phosphate
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ribose
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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. It is present in RNA.
Detailed explanation-2: -Correct answer: Uracil is a nitrogenous base that is only found in single-stranded RNA-it is not found in DNA.
Detailed explanation-3: -A nucleotide is the basic building block of nucleic acids (RNA and DNA). 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. The bases used in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T).
Detailed explanation-4: -Complete answer: Ribose sugar is not a component of DNA. RNA constitutes ribose sugar which is a carbon sugar and is a monosaccharide. DNA consists of deoxyribose sugar which is linked to a nitrogenous base at the first carbon through a glycosidic bond.
Detailed explanation-5: -DNA contains deoxyribose as the sugar component and RNA contains the sugar ribose. Polynucleotides are formed by covalent linkages between the phosphate of one nucleotide and the sugar of another, resulting in phosphodiester linkages.