THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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TGAGC
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UGAGC
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ACTCG
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ACUCG
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Detailed explanation-1: -Because transcription is the primary mechanism by which the cell controls which proteins are to be made and at what rate, it is a particularly significant phase in gene expression. Therefore, if DNA sequence is actcg it produces mRNA sequence UGAGC.
Detailed explanation-2: -DNA utilizes four bases, adenine (A), guanine (G), cytosine (C), and thymine (T), in its code. RNA also uses four bases. However, instead of using ‘T’ as DNA does, it uses uracil (U). Therefore, if your DNA sequence is 3’ T C G T T C A G T 5’, the mRNA sequence would be 5’ A G C A A G U C A 3’.
Detailed explanation-3: -After the transcription of DNA to mRNA is complete, translation-or the reading of these mRNAs to make proteins-begins. Recall that mRNA molecules are single stranded, and the order of their bases-A, U, C, and G-is complementary to that in specific portions of the cell’s DNA.
Detailed explanation-4: -The sequence for AACGTAACG in mRNA molecule synthesized after transcription from a DNA strand shall be UUGCAUUGC. In an RNA strand, the genetic code follows the sequence of A-U, G-C, and T-A. Thus, by this genetic coding, the correct answer is option B.