Genetic code is a _ code and out of 64 codons, _ are nonsense codons.
Correct answer: D. Triplet ; three
- A. Single ; two
- B. Single ; three
- C. Triplet ; two
- D. Triplet ; three
Explanation
The genetic code has a triplet base. Nonsense codons are those that terminate the translation process since there are no corresponding tRNA molecules with anticodons for them. Genetic code is a degenerate code, meaning that multiple codons can code for the same amino acid. Out of the 64 codons, 3 of them are nonsense codons or stop codons. These stop codons (UAA, UAG, and UGA in the standard genetic code) do not code for any amino acid but instead signal the termination of protein synthesis.
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Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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