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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on one strand of the DNA
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in the center of the two strands
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on both strands of the DNA
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Detailed explanation-1: -The sugar-phosphate backbones of the DNA strands make up the outside of the helix, while the nitrogenous bases are found on the inside and form hydrogen-bonded pairs that hold the DNA strands together.
Detailed explanation-2: -Nitrogenous bases present in the DNA can be grouped into two categories: purines (Adenine (A) and Guanine (G)), and pyrimidine (Cytosine (C) and Thymine (T)). These nitrogenous bases are attached to C1’ of deoxyribose through a glycosidic bond. Deoxyribose attached to a nitrogenous base is called a nucleoside.
Detailed explanation-3: -The nitrogen bases are held together by hydrogen bonds: adenine and thymine form two hydrogen bonds; cytosine and guanine form three hydrogen bonds.
Detailed explanation-4: -Hydrogen bond (H-bond) binds the nitrogen bases between the two strands of DNA.
Detailed explanation-5: -The sugar and phosphate group make up the backbone of the DNA double helix, while the bases are located in the middle.