Which Of The Following Polypeptide Chains Would Be Sequenced From The Mrna Code Agg-gag-ccc?

Which of the following polypeptide chains would be sequenced from the mRNA code AGG-GAG-CCC?

The mRNA code AGG-GAG-CCC translates to the amino acid sequence arginine-glutamic acid-proline. This means that the polypeptide chain that would be sequenced from this mRNA code consists of these three amino acids in that specific order.

Understanding mRNA and Protein Synthesis

Before we delve into understanding which polypeptide chain would be sequenced from the given mRNA code, let’s take a moment to understand the basics of mRNA and protein synthesis.

DNA holds the genetic code that contains instructions for building proteins. However, it cannot directly leave the nucleus of a cell. mRNA, or messenger RNA, plays a crucial role in the process of protein synthesis by carrying this genetic information from the DNA to the ribosomes in the cytoplasm where proteins are synthesized.

The genetic code stored in DNA is transcribed into mRNA through a process called transcription. In this process, an enzyme called RNA polymerase binds to a specific region of the DNA and creates a complementary strand of mRNA using the nucleotide bases A, U, C, and G. The resulting mRNA molecule is then processed and exported out of the nucleus.

Once the mRNA is in the cytoplasm, it undergoes translation, which is the process of decoding the genetic information to synthesize a protein. This decoding process occurs at the ribosomes with the help of transfer RNA (tRNA) molecules.

During translation, the mRNA code is read in sets of three bases called codons. Each codon corresponds to a specific amino acid or a signal to start or stop protein synthesis. The sequence of codons determines the order of amino acids in a polypeptide chain, which ultimately determines the structure and function of the protein.

Decoding the mRNA Code AGG-GAG-CCC

Now, let’s decode the mRNA code AGG-GAG-CCC step by step to determine the polypeptide chain that would be sequenced from it:

Step 1: Determine the Codons

The mRNA code AGG-GAG-CCC consists of three codons: AGG, GAG, and CCC.

Step 2: Identify the Amino Acids

Next, we need to match each codon to its corresponding amino acid according to the universal genetic code. Here are the amino acids that correspond to the given codons:

– AGG (Arginine)
– GAG (Glutamic Acid)
– CCC (Proline)

Step 3: Arrange the Amino Acids in Sequence

Finally, we arrange the amino acids in the order dictated by the mRNA code:

– Arginine (Arg)
– Glutamic Acid (Glu)
– Proline (Pro)

Therefore, the polypeptide chain that would be sequenced from the mRNA code AGG-GAG-CCC is arginine-glutamic acid-proline. It is important to note that the given mRNA code only represents a small portion of a complete gene sequence. In a real-life scenario, the sequence would be much longer and consist of multiple codons and corresponding amino acids.

Frequently Asked Questions

Q: What is the purpose of mRNA in protein synthesis?

A: mRNA plays a crucial role in protein synthesis by carrying the genetic instructions from the DNA to the ribosomes, where proteins are synthesized. It serves as an intermediary molecule, carrying the code from the DNA in the nucleus to the cytoplasm where protein synthesis occurs.

Q: How are amino acids connected to form a polypeptide chain?

A: Amino acids are connected through a process called peptide bond formation. During translation, the ribosome brings together the amino acids that correspond to the mRNA codons, and an enzyme called peptidyl transferase forms a peptide bond between them. This process repeats until the entire polypeptide chain is synthesized.

Q: Can the same codon specify more than one amino acid?

A: The genetic code is degenerate, meaning that multiple codons can specify the same amino acid. This is possible due to the redundancy in the genetic code. For example, the amino acid leucine is specified by six different codons: UUA, UUG, CUU, CUC, CUA, and CUG.

Final Thoughts

Understanding how the mRNA code is translated into amino acids is essential in comprehending the process of protein synthesis. By decoding the given mRNA code AGG-GAG-CCC, we determined that the corresponding polypeptide chain consists of the amino acids arginine, glutamic acid, and proline. While this example only represents a small portion of a gene sequence, it showcases the fundamental principles of mRNA translation. Protein synthesis is a complex and tightly regulated process that plays a vital role in all living organisms. By further exploring the intricacies of this process, we can gain valuable insights into various aspects of molecular biology and genetics.

Leave a Comment