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 two strands of a DNA double helix are antiparallel. This means that ____
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they both run in the 3’ to 5’ direction
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one strand runs in the 5’ to 3’ direction, and the other runs in the 3’ to 5’ direction
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one strand is actually composed of RNA
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the two strands are mirror images
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Explanation:
Detailed explanation-1: -In biochemistry, two biopolymers are antiparallel if they run parallel to each other but with opposite directionality (alignments). An example is the two complementary strands of a DNA double helix, which run in opposite directions alongside each other.
Detailed explanation-2: -Note: The main reason why DNA strands are antiparallel is due to the high level of stability achieved in an antiparallel configuration. DNA can also exist in parallel configuration but the base pairing will be different (reverse Watson and Crick base pairing) and stability will be less.
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