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 if given the base sequence for one strand: 5’-AGGTCCG-3’, the complimentary strand must have the sequence: 3’-TCCAGGC-5’.
Detailed explanation-2: -It synthesizes the RNA strand in the 5’ to 3’ direction, while reading the template DNA strand in the 3’ to 5’ direction. The template DNA strand and RNA strand are antiparallel. RNA polymerase always builds a new RNA strand in the 5’ to 3’ direction.
Detailed explanation-3: -A DNA strand is complementary. This means adenine pairs with thymine and cytosine pairs with guanine in the opposite strand. The given strand has a sequence 5’-GAATTG-3’. Hence the complementary strand will have a sequence 5’-CAATTC-3’.
Detailed explanation-4: -While the DNA template runs in the direction 3’ → 5’, the newly synthesised mRNA strand is in 5’ → 3’.