Read the passage given below and answer the following questions:The se...
Each codon specifies one amino acid. Many amino acids possess more than one codons.
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Read the passage given below and answer the following questions:The se...
Introduction:
The passage explains the process of how the sequence of bases in mRNA is read and how it determines the amino acids in a protein. It also discusses the role of tRNA in bringing the amino acids to the mRNA.
Explanation:
- Codons:
- The sequence of bases in mRNA is read in groups of three, known as codons.
- Each codon specifies one amino acid.
- Therefore, each codon is responsible for specifying a single amino acid.
- Specificity:
- Each codon has a specific sequence of bases that determines the amino acid it codes for.
- Multiple codons can code for the same amino acid.
- This is known as degeneracy or redundancy in the genetic code.
- tRNA:
- Another type of RNA called tRNA brings the amino acids to the mRNA during protein synthesis.
- Each amino acid has at least one corresponding tRNA molecule.
- The tRNA molecule contains a trinucleotide base sequence at one end, which is complementary to the trinucleotide base sequence on the mRNA.
- This complementary base pairing ensures that the correct amino acid is added to the growing protein chain.
Conclusion:
In summary, each codon in mRNA specifies one amino acid. The sequence of bases in the codon determines the specific amino acid it codes for. Multiple codons can code for the same amino acid, providing redundancy in the genetic code. The tRNA molecules, with their complementary trinucleotide base sequences, bring the corresponding amino acids to the mRNA, ensuring the accurate synthesis of proteins.