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, cytosine, and a lipid
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deoxyribose, thymine, and a phosphate group
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ribose, uracil, and a polypeptide
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ribose, adenine, and thymine
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Detailed explanation-1: -DNA nucleotides comprise a deoxyribose sugar, any one of the nitrogenous bases-adenine, guanine, cytosine, or thymine and a phosphate group. Therefore, deoxyribose, thymine, and a phosphate group represent a DNA nucleotide. Hence, option c is correct.
Detailed explanation-2: -A molecule consisting of a nitrogen-containing base (adenine, guanine, thymine, or cytosine in DNA; adenine, guanine, uracil, or cytosine in RNA), a phosphate group, and a sugar (deoxyribose in DNA; ribose in RNA).
Detailed explanation-3: -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). In RNA, the base uracil (U) takes the place of thymine.
Detailed explanation-4: -A DNA strand comprises four nucleotides: two purine bases, adenine (A) and guanine (G), and two pyrimidine bases, thymine (T) and cytosine (C). Each base is connected to a deoxyribose sugar and linked by phosphodiester bonds at the 5′ and 3′ carbon of the sugar.
Detailed explanation-5: -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). These bases form specific pairs (A with T, and G with C).