True/False: the trp is found in humans.

True/False: the trp is found in humans.

• A. True
• B. False
• C. Not applicable
• D. Not found in humans

Answer: (B)

The concept here is that operons are regulatory units used by bacteria to coordinate the expression of a group of genes, often for a linked biosynthetic pathway. The trp operon specifically controls the enzymes needed to make tryptophan in prokaryotes like E. coli. Humans, on the other hand, do not organize genes for biosynthesis of amino acids into operons. We obtain essential amino acids such as tryptophan from our diet, and our gene regulation operates through more complex, dispersed mechanisms rather than a single operon on/off switch for an entire biosynthetic pathway. So the statement is false because the trp (tryptophan) operon is a bacterial feature and is not present in humans. Note that tryptophan itself is a real amino acid found in humans as part of proteins, but the regulatory system for its synthesis in bacteria does not occur in our cells.

The concept here is that operons are regulatory units used by bacteria to coordinate the expression of a group of genes, often for a linked biosynthetic pathway. The trp operon specifically controls the enzymes needed to make tryptophan in prokaryotes like E. coli. Humans, on the other hand, do not organize genes for biosynthesis of amino acids into operons. We obtain essential amino acids such as tryptophan from our diet, and our gene regulation operates through more complex, dispersed mechanisms rather than a single operon on/off switch for an entire biosynthetic pathway.

So the statement is false because the trp (tryptophan) operon is a bacterial feature and is not present in humans. Note that tryptophan itself is a real amino acid found in humans as part of proteins, but the regulatory system for its synthesis in bacteria does not occur in our cells.