THE MOLECULAR BASIS OF INHERITANCE
GENE MUTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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amino acids and sugars
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nucleotide bases, including thymine
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nucleotide bases, including uracil
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sugar-phosphate molecules
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Detailed explanation-1: -The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladder’s rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder. An important property of DNA is that it can replicate, or make copies of itself.
Detailed explanation-2: -Other combinations of the atoms form the four bases: thymine (T), adenine (A), cytosine (C), and guanine (G). These bases are the rungs of the DNA ladder.
Detailed explanation-3: -The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is deoxyribose.
Detailed explanation-4: -It has an alternating chemical phosphate and sugar backbone, making the ‘sides’ of the ladder. (Deoxyribose is the name of the sugar found in the backbone of DNA.) In between the two sides of this sugar-phosphate backbone are four nitrogenous bases: adenine (A), thymine (T), cytosine (C), and guanine (G).