Stop signal:
Correct answer: C. U ribonucleotide
- A. GC + AT base pairs
- B. 3' end
- C. U ribonucleotide
- D. Core enzyme
Explanation
Uridine (U) ribonucleotide, when found in messenger RNA (mRNA), can be related to a stop signal through the presence of a specific sequence known as a stop codon. In the genetic code, there are three stop codons: UAG, UAA, and UGA. When the ribosome encounters one of these stop codons during translation, it signals the termination of protein synthesis. Uridine (U) ribonucleotide is involved in the formation of these stop codons within the mRNA molecule, thus playing a crucial role in the regulation of protein synthesis.
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