Firstly, who suggested that genetic codes are triplet.

Options

A. George Gamow
B. Crick
C. Ochoa
D. Nirenberg

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks who first suggested that genetic codes are triplet, meaning that three nucleotide bases correspond to one amino acid.

2. **Defining Genetic Code**: The genetic code is a set of rules that defines how the sequence of nucleotides in DNA or RNA is translated into the sequence of amino acids in proteins. A triplet code means that three nucleotides (bases) together form a codon that specifies a particular amino acid.

3. **Identifying Key Figures in Genetics**: The question provides multiple-choice options, including notable scientists in the field of genetics. It is essential to analyze their contributions to determine who made the triplet code suggestion.

4. **Reviewing Contributions**:
- **George Gamow**: A physicist who, in 1950, suggested that the genetic code is triplet. This is the correct answer.
- **Francis Crick**: Known for proposing the central dogma of molecular biology, but he did not suggest that the genetic code is triplet.
- **Nirenberg**: He worked on the genetic code and studied codons but did so based on Gamow's suggestion.

5. **Conclusion**: The correct answer to the question is George Gamow, who first proposed that the genetic code is triplet.

**Final Answer**: George Gamow suggested that genetic codes are triplet.

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