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DNA is considered a universal genetic code. Which statement is true of the genetic code?
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15. Gene Expression
Genetic Code
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What is the complementary mRNA codon for the DNA sequence 'ATG'?
A
TAC
B
UAC
C
AUG
D
GUA
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Understand that DNA sequences are transcribed into mRNA sequences during the process of transcription. Each DNA base pairs with a complementary RNA base.
Identify the DNA bases in the given sequence 'ATG'. These are Adenine (A), Thymine (T), and Guanine (G).
Recall the base pairing rules for transcription: Adenine (A) pairs with Uracil (U) in RNA, Thymine (T) pairs with Adenine (A), and Guanine (G) pairs with Cytosine (C).
Apply these rules to the DNA sequence 'ATG' to find the complementary mRNA sequence. Replace each DNA base with its corresponding RNA base: A -> U, T -> A, G -> C.
Combine the complementary RNA bases to form the mRNA codon. The sequence 'ATG' in DNA becomes 'UAC' in mRNA.
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