Question

In the nitrogen-base sequence of one strand of DNA is CAT , TAG , GAC . Then the sequence of its complemtnry m-RNA will be -

(1) GUA , AUC , CUG
(2) GUA , UTC , CTG
(3) AUG , CUA , GUC
(4) AUG , CTU , GUC

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Answer 1

Answer:

in the place of cytosine, guanine comes and in the place of adenosine comes thymine in the case of DNA but in the case of mRNA in place of thymine comes uracil. ( that is why in place of adenosine, uracil comes)

so (a) is the answer

Explanation:

CAT, TAG and GAC are sequences in DNA

Answer 2

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HERE IS UR ANSWER

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$\fbox{option 1 is the correct answer }$

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If the base sequence of one strand of DNA is CAT, TAG, GAC, the base sequence of its complementary mRNA would be GUA, AUC, CUG because, in RNA, uracil binds to adenine via two hydrogen bonds.Each nucleotide in RNA contains a ribose sugar, with carbons, numbered 1' through 5'. A base is attached to the 1' position, in general, adenine (A), cytosine (C), guanine (G), or uracil (U). Adenine and guanine are purines, cytosine and uracil are pyrimidines