You inherit the dna that composes your chromosomes from your mother and your father. you have inherited a protein that stops the production of an enzyme, a protein, to you digest milk. scientists have figured out that this protein contains an amino acid that really does say stop whenever the enzyme starts to be produced. what nitrogen bases, found in your dna, could be arranged to produce this stop amino acid?
a) c, g, u
b) u, a, t
c) a, t, g
eliminate
d) a, t, and c

D. A, T, C

Explanation:

Three codons serve as stop codon. These are UAA, UGA and UAG. Stop codons leads to termination of protein synthesis. The nitrogen bases present in stop codons are A, U and G. The mRNA, which serves as template for protein synthesis, is complementary to DNA. Hence, the DNA bases that could produce stop codon are: A, T and C (A of mRNA pairs with T of DNA; U of mRNA pairs with A of DNA and G of mRNA pairs with C of DNA.)

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