OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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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: -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-2: -DNA is made up of two strands. Each strand has a backbone made up of alternating sugars and phosphate groups. The two strands are linked by complementary nitrogenous bases. The strands are oriented in opposite directions, making the structure “antiparallel".
Detailed explanation-3: -A DNA double helix is always anti-parallel; in other words, one strand runs in the 5’ to 3’ direction, while the other runs in the 3’ to 5’ direction. This makes it necessary for the two new strands, which are also antiparallel to their templates, to be made in slightly different ways.
Detailed explanation-4: -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.