BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3’-TACGATCATAT-5’
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3’-ATGCTAGTATA-5’
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3’-AUGCUAGUAUA-5’
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3’-GCATATACGCG-5’
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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: -According to complimentary base pairing, A pairs with T and C with G. For the given sequence, the complementary strand will be 3’-TACGTACGTACGTACGTACGTACGTACG − 5’. So, the sequence of the complimentary strand in 5’ to 3’ direction is 5’-GCATGCATGCATGCATGCATGCATGCAT− 3’. Was this answer helpful?
Detailed explanation-3: -If one strand of a DNA molecule has the sequence of bases 5’ATTGCA3’, the other complementary, antiparallel strand of DNA would have the sequence: 5’TGCAAT3’.
Detailed explanation-4: -The correct answer is c. In addition, cytosine (C) will complement guanine (G), and adenine (A) will complement thymine (T). Therefore, the complementary strand to 5’ TAGAC 3’ will be: 3’ ATCTG 5’ which is the same as option c.
Detailed explanation-5: -Complementary Sequence: Since DNA has two strands, every DNA sequence has a complementary sequence running parallel. In the complementary sequence, Adenine (A) is always paired with Thymine (T), and Cytosine (C) is always paired with Guanine (G).