While mRNA strands are being created a sequence is sometimes miscopied. What is the best possible outcome for the cell should this take place? (4 points)
1.The miscopied sequence codes for the same amino acids as the original sequence.
2.The new sequence creates a protein that serves a different function from the original.
3.The ribosomes will correct the mistake before the tRNA matches an amino acid to it.
4.The mRNA will only be used to create non-critical proteins for the cell.
Answers
Answer:
b
Explanation:
Protein synthesis is the process of synthesis of protein chain from mRNA that contains the information in the form of codon (three letter genetic code that codes for a specific amino acid each). During the process of translation, amino acids are not recognized by mRNA. Each amino acid has a particular tRNA for it. tRNA is charged with an amino acid, i.e., covalently bound to the amino acid at its amino acid acceptor end. tRNA then is pairs with the mRNA through hydrogen bonds between the codon in mRNA and anticodon loop in tRNA. There are some amino acids (18 among 22) which are encoded by more than one codon. Because of this reason only the genetic code is termed as degenerate. Every amino acid has only one amino acid attachment side called as amino acid acceptor end. It is present at 3'end of tRNA chain with CCA sequence and has terminal OH group. It combines with the specific amino acid and is common in all tRNA molecules. The third base of a codon shows less stringent and less specific base pairing. It shows wobble pairing with tRNA anticodon loop such that there the same tRNA can pair with more than one codons. Thus, the correct answer is option B.