GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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5’-AUG A AUG-3’
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5’-UACUU AC-3’
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5’-CAUUCAU-3’
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5’-GUAAGUA-3’.
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Detailed explanation-1: -Solution. If the sequence of nitrogen bases of the coding strand of DNA in a transcription unit is 5’-A T G A A T G-3’ the sequence of bases in its RNA transcript would be 5’-A U G A A U G-3’.
Detailed explanation-2: -Except for uracil which replaces thymine in mRNA. A (Adenine) pairs with U (Uracil) instead of Thymine (T) and C (Cytosine) pairs with G (Guanine). Thus, the complementary RNA sequence will be: UAAGCUAC.
Detailed explanation-3: -By convention, the coding strand is the strand used when displaying a DNA sequence. It is presented in the 5’ to 3’ direction.
Detailed explanation-4: -mRNA strand is complementary to template strand of DNA, while coding strand has same sequence as RNA (except thymine at the place of uracil). Hence, the sequence of bases in mRNA will be AUUCGAUG.