What would happen to a human if this biosynthesis of amino acid pathway became disabled in a cell. Would anything not get made? Would anything build up?

why are all 20 amino acids important for protein synthesis

Which of these mutations would you predict to be most detrimental?  Explain your answer.  (Refer to a chart of amino acid structures as necessary.)     Asp to Glu     Asn to Glu     Cys to Lys     Pro to Gly     Val to Thr

Anfinsen studied protein folding using RNaseA. In one experiment we didn’t discuss in class, he heated RNase in the presence of BME, then he transferred the protein out of water into benzene, and cooled the protein in the presence of O2. Under these conditions, did Anfinsen find the protein was active? Justify your answer.

Which of the following is true about amino acyl tRNA synthetase? O It binds both an ATP molecule and an amino acid within its active site. Each amino acyl tRNA synthetase is specific for a given a amino acid. O It links AMP to the COOH end of an amino acid. It links an amino acid to the 3' end of the correct tRNA molecule. O All of the above are true.

A protein had the amino acids leu-gly at codons 10 and 11. A deletion of the 5’ base of the leu codon (i.e. the first base) changed the protein so that it now reads ser-ala at codons 10 and 11. The original Leu codon must have been: (hint: make use of a codon table to answer this question)   CUG AUG CUA CUC      CUU

What characteristic of the genetic code explains why a substitution mutation in a codon contained within a protein coding gene does not always result in a replacement of one amino acid for another?

For each amino acid added to a polypeptide which of the following must happen?   a a charged tRNA must bind at the A site of a ribosome   b a peptide bond must be made   c the mRNA must move down three bases   d all of the above

What feature of RNA would allow it to function as a ribozyme? Why are there no naturally occurring DNA enzymes?