GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The twisting nature of DNA creates nonparallel strands.
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One strand is positively charged and the other is negatively charged.
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The 5’ to 3’ direction of one strand runs counter to the 5’ to 3’ direction of the other strand.
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Base pairings create unequal spacing between the two DNA strands
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Detailed explanation-1: -DNA is composed of two strands of nucleotides held together by hydrogen bonding. The strands each run from 5’ to 3’ and run in antiparallel, or opposite, directions from one another.
Detailed explanation-2: -The term ‘antiparallel’ means that the strands run in opposite directions, parallel to one another. The antiparallel strands twist in a complete DNA structure, forming a double helix.
Detailed explanation-3: -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.
Detailed explanation-4: -The orientation of the two DNA strands is antiparallel. This means that the 3’ hydroxyl end of one strand is opposite the 5’ phosphate group of the other strand.