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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3’-AATGCTAC-5’
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3’-CATCGTAA-5’
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3’-TTACGATG-5’
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3’-GTAGCATT-5’
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Detailed explanation-1: -Because of the complimentary base pairing rule, if the strand sequence is AATGCTAC, the complementary sequence will be TTACGATG.
Detailed explanation-2: -The sequence of the mentioned DNA strand is 5’-ATCAGC-3’. So, the sequence of the complementary strand will be 3’-TAGTCG-5’.
Detailed explanation-3: -The given strand has a sequence 5’-GAATTG-3’. Hence the complementary strand will have a sequence 5’-CAATTC-3’.
Detailed explanation-4: -So, the sequence of the complimentary strand in 5’ to 3’ direction is 5’-GCATGCATGCATGCATGCATGCATGCAT− 3’. Was this answer helpful?
Detailed explanation-5: -The need for accuracy probably explains why DNA replication occurs only in the 5′-to-3′ direction. If there were a DNA polymerase that added deoxyribonucleoside triphosphates in the 3′-to-5′ direction, the growing 5′-chain end, rather than the incoming mononucleotide, would carry the activating triphosphate.