Why Would Bacteria Evolve So That the Presence of Tryptophan

question 39

Multiple Choice

Why would bacteria evolve so that the presence of tryptophan inhibits its own production?

• A)Producing the enzymes that synthesize tryptophan is metabolically expensive,so it is wasteful to make them when tryptophan levels are high and its synthesis is not necessary.
• B)Producing high levels of tryptophan inhibits the production of other amino acids,so inhibiting its production allows all amino acids to be synthesized at equal concentrations.
• C)High levels of tryptophan causes cells to become unresponsive to external stimuli,so its production must be regulated.
• D)High levels of tryptophan inhibit cellular respiration and the synthesis of ATP,so its production must be regulateD.
• E)All of these choices are TRUE.

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Definitions:

Predominant Form

The most abundant or common form of a substance under specified conditions.

L-Phenylalanine

An essential amino acid with the formula C9H11NO2, used in the biosynthesis of proteins.

Biological pH

The pH range maintained in biological systems and fluids critical for the proper functioning of cells and biochemical processes.

Isoelectric Point

The pH at which a particular molecule carries no net electrical charge, often referenced in the context of amino acids and proteins.