A polypeptide of five amino acids is synthesized during protein synthesis in eukaryotic cells. Which one of the following can be the correct polypeptide?

Options

A. Glycine-valine-methionine-histidine-lysine
B. Methionine-glycine-histidine-lysine-valine
C. Valine-methionine-glycine-histidine-lysine
D. histidine-lysine-methionine-valine-glycine

Answer

To solve the question regarding the correct polypeptide synthesized during protein synthesis in eukaryotic cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Protein Synthesis**:
- Protein synthesis in eukaryotic cells involves two main processes: transcription and translation.
- Transcription is the process where DNA is transcribed into mRNA, and translation is where mRNA is translated into a polypeptide chain (protein) at the ribosome.

2. **Identifying the Start Codon**:
- The translation process begins with a start codon, which is typically AUG.
- AUG codes for the amino acid Methionine, which is the first amino acid in the polypeptide chain.

3. **Codons and Amino Acids**:
- There are a total of 64 codons, of which 61 code for amino acids and 3 are stop codons (UAA, UAG, UGA).
- Each codon consists of three nucleotides and corresponds to a specific amino acid.

4. **Constructing the Polypeptide**:
- Since the question specifies a polypeptide of five amino acids, we need to ensure that the first amino acid is Methionine (AUG).
- The remaining four amino acids can be any of the 20 standard amino acids, as long as they are coded by the remaining codons.

5. **Evaluating Options**:
- The options provided in the question will contain different sequences of amino acids.
- We need to identify which option starts with Methionine and consists of a total of five amino acids.

6. **Selecting the Correct Option**:
- After evaluating the options, we find that the correct polypeptide sequence is the one that begins with Methionine and has a total of five amino acids.

### Conclusion:
The correct polypeptide synthesized during protein synthesis in eukaryotic cells is the one that starts with Methionine (AUG) and contains a total of five amino acids.

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