THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The 3 prime end is phosphorylated
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It is a double-stranded helix.
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It has a uniform diameter.
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It is a right-handed helix.
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Detailed explanation-1: -The sugar is the 3’ end, and the phosphate is the 5’ end of each nucleiotide. The phosphate group attached to the 5’ carbon of the sugar on one nucleotide forms an ester bond with the free hydroxyl on the 3’ carbon of the next nucleotide.
Detailed explanation-2: -Answer and Explanation: The correct option: The structure which is not true for a DNA molecule is B. Single-stranded. The structure of a DNA molecule is formed with the combining of two strands to form its characteristic double helix.
Detailed explanation-3: -A nucleic acid strand is inherently directional, and the “5 prime end” has a free hydroxyl (or phosphate) on a 5’ carbon and the “3 prime end” has a free hydroxyl (or phosphate) on a 3’ carbon (carbon atoms in the sugar ring are numbered from 1’ to 5’; ).
Detailed explanation-4: -Each end of DNA molecule has a number. One end is referred to as 5’ (five prime) and the other end is referred to as 3’ (three prime). The 5’ and 3’ designations refer to the number of carbon atom in a deoxyribose sugar molecule to which a phosphate group bonds.