Whose experiments cracked the DNA and discovered unequivocally that the genetic code is a "triplet"?
Correct answer: D. Nirenberg and Mathaei
- A. Hershey and Chase
- B. Morgan and Sturtevant
- C. Beadle and Tatum
- D. Nirenberg and Mathaei
Explanation
Marshall Nirenberg and J. Heinrich Matthaei were pioneering scientists who, in 1961, performed a landmark experiment that cracked the first piece of the genetic code, showing that the RNA sequence UUU codes for the amino acid phenylalanine, launching the race to decipher the full triplet code and revealing how DNA's instructions translate into proteins.
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About Chromosomes
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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