Select the incorrect option w.r.t. salient features of genetic code.

Options

A. One codon overlaps the next codon
B. The code is nearly universal
C. The codon is read in mRNA in a contiguous fashion
D. The codon is triplet

Answer

To solve the question regarding the incorrect option with respect to the salient features of the genetic code, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the 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.

2. **Identify the Features of the Genetic Code**:
- **Triplet Nature**: Each codon consists of three nucleotides.
- **Start Codon**: AUG is the start codon that codes for Methionine.
- **Stop Codons**: There are three stop codons (UAA, UGA, UAG) that signal the end of protein synthesis.
- **Universality**: The genetic code is nearly universal across all organisms.
- **Non-ambiguous**: Each codon specifies only one amino acid.
- **Non-overlapping**: Codons do not overlap; the reading frame is continuous.
- **Comma-less**: There are no gaps between codons.
- **Polarity**: The code is read in the 5' to 3' direction.

3. **Analyze the Options**: The question asks to select the incorrect option regarding these features.
- If one of the options states that "1 codon overlaps the next codon," this is incorrect because codons are non-overlapping.

4. **Conclusion**: The incorrect option is the one that states that codons overlap. Therefore, the answer is the option that claims "1 codon overlaps the next codon."

### Final Answer:
The incorrect option with respect to the salient features of the genetic code is: **1 codon overlaps the next codon.**

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