One of the benefits of the degeneracy of the genetic code is that it conserves o

Question

One of the benefits of the degeneracy of the genetic code is that it conserves on material, as the same codon can be used over and over in different genes. it lessens the chance of deleterious mutations. it makes possible the use of a nonoverlapping, unpunctuated code. it allows for the tRNA to proofread the mRNA sequence and correct any mistakes. it ensures that methionine will be used only at the start of translation. The genetic code is said to be degenerate. This means that an amino acid may be specified by more than one codon. a codon may specify more than one amino acid. a codon may code for no amino acid. all amino acids are represented by an equal number of codons. the third base of the codon is irrelevant in determining the amino acid it codes for. Termination of protein synthesis occurs when a stop or termination codon is in the A site. This occurs because the stop codons recognize specific termination tRNAs that do not have amino acids attached to them. as the stop codon moves from the A site to the P site the tRNA containing the newly synthesized protein is released. these codons are recognized by specific proteins which also release the newly synthesized protein chain from the ribosome. there are no tRNAs that base pair with stop codons, so translation stalls and the ribosome dissociates. EF-G binds to the empty A-site and pushes the P-site tRNA with attached peptide out of the ribosome. During translation, the mRNA is read in the direction and protein synthesized in the direction. 5'-to-3'; amino-to-carboxyl 3'-to-5'; carboxyl-to-amino 5'-to-3'; carboxyl-to-amino 3'-to-5'; amino-to-carboxyl Which of the following is NOT true of tRNA? tRNA contains an amino acid attachment site. tRNA stands for transfer RNA. tRNA contains a codon. tRNA contains unusual bases. G tRNA is L-shaped.

Explanation / Answer

1 It lessens the chance of deleterious mutations

2 an aminoacid may be specified by more than one codon

3 These codons are recognized by specific proteins wich also release the newly synthesized protein chain from the ribosome

4 5´to 3´; amino-to-carboxyl

5 tRNA contains a codon, FALSE because it contains an ANTICODON

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