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An mRNA sequence is divided into three nucleotide sequences called:
  1. Codons
  2. Anticodons
  3. Genes
  4. Alleles
  5. Splice sites
Explanation
Answer: A, Codons. Each codon codes for a single amino acid or as a stop signal to end translation.

Key Takeaway: Anticodons are three nucleotides sequences in tRNA that correspond to codons in mRNA. Genes and alleles are both only associated with DNA. A splice site is the point where a DNA or RNA transcript will be cut.
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