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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A template strand of DNA is 3’TAGGCATTGCA 5’What is the complementary DNA strand that is created from this template during replication?
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5’ TGCAATGCCTA 3’
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5’ TAGGCATTGCA 3’
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5’ AUCCGUAACGU 3’
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5’ATCCGTAACGT 3’
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Explanation:
Detailed explanation-1: -The given strand has a sequence 5’-GAATTG-3’. Hence the complementary strand will have a sequence 5’-CAATTC-3’. Thus the correct answer is option A.
Detailed explanation-2: -So, the sequence of the complimentary strand in 5’ to 3’ direction is 5’-GCATGCATGCATGCATGCATGCATGCAT− 3’. Was this answer helpful?
Detailed explanation-3: -Adenine makes the double bond with thymine while guanine makes the triple bond with cytosine which means adenine and thymine are complementary base pairs and cytosine and guanine are complementary base pairs. The complementary sequence for the DNA strand 5’ ATCGAACGT 3’ is 3’ TAGCTTGCA 5’.
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