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Hello students.
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Now in this question they have given a short fragment of dna and in this dna all we need to find is the complementary strand of the dna.
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To find the complementary strand, that's one concept we need to know.
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What is that concept? it is the watson and crick base pairing, right? so in case of watson and crick base pairing, what do you observe? you observe that adinin always bonds with thymine.
00:30
And similarly, thymine always bonds with adenine.
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The next thing is that guanin.
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Guanin forms a triple hydrogen bond with cytosin and cytosin forms a triple hydrogen bond with guanin.
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Right? so these things we need to keep in mind before solving this question.
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Now, if we solve the question, let us write the structure again, that is acc, gtt, a, c, t, g.
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Right.
01:03
So this is the structure that they have given.
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Now, to find the complementary, always if you observe, if 5 prime is towards this side, the next strand will have 3 prime at this end and 5 prime at the other end, right? that's how you will observe the complementary strand to be present in case of the dna molecule.
01:23
In case of a, if a is here, what will be here? it will be t, correct? and if c is here, then you will observe g to be present, right? again, g is in the template strand, so the complementary strand will have c.
01:40
T is in the template strand...